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Top pick: Gugxiom 100 mm actuator Best value: DTGN 125 mm mini actuator – A complete 125 mm, 128 N spec at about £21.99, the lowest price here. Score 60. The star line is 4.0 from one review, and the box had no instructions. Updated 22.10.2026.
A linear motor on amazon.co.uk is an electric linear actuator, not a magnet-track drive. A small DC motor turns a screw that extends a rod, or a crank shuttles. In the UK, people buy one to lift a hatch, open a vent, move a camper bed, or tilt a ground-mounted panel.
A usable listing states stroke, retracted length, force in newtons, speed, voltage and an ingress mark together. Those checks are set out in the [linear motor buying guide](/hub/electrical-equipment/linear-motor/sub/linear-motor-buying-guide).
A screw ram extends, stops, and is often claimed to hold. A reciprocating unit will not hold a hatch. Match 12 V or 24 V to the supply you already have. Under IEC 60529, IP65 is dust-tight and protected against water jets, not immersion. IP54 is dust-protected and splash-proof. If the closed length does not fit the gap, the stroke does not matter. A title that disagrees with a bullet on force is a weaker buy than a listing whose figures agree. A high-force ram is not a powered-gate kit and not a device that lifts a person.
A linear motor on amazon.co.uk is an electric linear actuator, not a magnet-track drive. A small DC motor turns a screw that extends a rod, or a crank shuttles.
A linear motor on amazon.co.uk is an electric linear actuator, not a magnet-track drive. A small DC motor turns a screw that extends a rod, or a crank shuttles. In the UK, people buy one to lift a hatch, open a vent, move a camper bed, or tilt a ground-mounted panel.
A usable listing states stroke, retracted length, force in newtons, speed, voltage and an ingress mark together. Those checks are set out in the [linear motor buying guide](/hub/electrical-equipment/linear-motor/sub/linear-motor-buying-guide).
A screw ram extends, stops, and is often claimed to hold. A reciprocating unit will not hold a hatch. Match 12 V or 24 V to the supply you already have. Under IEC 60529, IP65 is dust-tight and protected against water jets, not immersion. IP54 is dust-protected and splash-proof. If the closed length does not fit the gap, the stroke does not matter. A title that disagrees with a bullet on force is a weaker buy than a listing whose figures agree. A high-force ram is not a powered-gate kit and not a device that lifts a person.
A linear motor on amazon.co.uk is an electric linear actuator, not a magnet-track drive. A small DC motor turns a screw that extends a rod, or a crank shuttles. In the UK, people buy one to lift a hatch, open a vent, move a camper bed, or tilt a ground-mounted panel. A usable listing states stroke, retracted length, force in newtons, speed, voltage and an ingress mark together. Those checks are set out in the linear motor buying guide. A screw ram extends, stops, and is often claimed to hold.
The Gugxiom ram is £33.29 at 24 V, with a 100 mm stroke and 750 N in the title, and the star line is 5.0 from three reviews. Speed, ingress rating, closed length, and a duty percentage are not in the file, so you cannot tell how long the body is when the rod is in. The only saved review is labelled Germany, calls it inexpensive, and says it fitted that project, with no fault named. Holders and retaining pins are included. The page asks whether it works in the cold and does not answer. Electric beds are named as a use, and there is no medical-device mark. A 5.0 from three reviews, one of them outside the UK, does not fill in the missing speed. You would only shortlist it if your supply is already 24 V and 100 mm is the travel you measured.
Pros
24 V, 100 mm, and 750 N printed on the title
Two holders and four retaining pins included
The saved review names no fault
Cons
Speed, IP rating, and closed length are absent
5.0 from three reviews, with one saved text labelled Germany
No answer on the listing to the cold-weather question
No duty figure
Best for: Your supply is already 24 V and you have measured a 100 mm travel with room for an unknown body length.
Less suitable: You need a speed, an IP mark, or a closed length before you order.
The JQDML 450 mm ram is £67.99 for 1500 N at 10 mm/s on 12 V, closed at 590 mm and open at 1040 mm. The star line is 5.0 from two reviews, and the file has no review text, so the stars do not say what was moved. IP65, end stops, a hold claim, and two brackets are stated. Duty percentage is not in this file, unlike the 300 mm sibling that prints 10%. Maximum current is 5 A and working power is also given as 40–50 W, which do not agree at 12 V. A controller is not included. The stroke is long for a mid force, and you are buying the printed pair rather than a crowd of UK reports. You would skip it if you need either the 3000 N push or a review that describes months of use.
Pros
450 mm stroke, 590 mm closed, 1040 mm open
1500 N at 10 mm/s on 12 V
IP65, end stops, and a hold claim
Two brackets included
Cons
5.0 from two reviews and no saved text
No duty percentage in this file
5 A and 40–50 W are both printed
No controller in the box
Best for: You have measured a 590 mm shut length and 1500 N at 10 mm/s is the pair you want.
Less suitable: You want 3000 N, a stated duty cycle, or review text before you pay £67.99.
This JQDML mini is £28.99 for a 200 mm stroke, 188 N, and 5 mm/s on 12 V, closed at 263 mm and open at 463 mm. The star line is 5.0 from one review, and the saved listing has no review text, so the five stars do not describe a job. Load current is printed at 0.3 A and no-load current at 0.1 A, which is more electrical detail than the cheaper mini. IP54 is the code, while the title says waterproof. The bullet weight is 0.225 lb including a bracket and the technical details say 127 g, so the mass is not a single figure. Two brackets are in the box and a controller is not. You get a longer stroke than the £21.99 mini, though you still have a one-review line and a weight conflict to live with.
Pros
200 mm stroke with 263 mm closed and 463 mm open
188 N at 5 mm/s, and 0.3 A on load
IP54, end stops, and a hold claim
Two mounting brackets included
Cons
5.0 from one review and no saved review text
Title says waterproof while the spec says IP54
Bullet weight and technical-details weight disagree
No duty percentage
Best for: You want about 200 mm of light 12 V travel and you can accept a single unpublished review.
Less suitable: You need UK review text, a settled weight, or more than 188 N.
The JQDML 550 mm ram is £74.99 for 400 N at 34 mm/s on 12 V, closed at 700 mm and open at 1250 mm. That speed is several times the 5 mm/s of the 3000 N ram, and the force is a small fraction of it. The star line is 5.0 from one review, with no review text in the file. IP65, end stops, a hold claim, and two brackets are stated. Duty percentage is not in this file. Maximum current is printed as 5 A and working power as 40–50 W, the same mismatch as on the slower siblings. A light panel or a vent that must cross half a metre quickly is the job the numbers describe. A heavy hatch that needs the 3000 N figure will stall this rod, whatever the single five-star line suggests.
Pros
550 mm stroke at 34 mm/s no load
Closed length 700 mm and open length 1250 mm are printed
IP65, end stops, and a hold claim
Two brackets included
Cons
400 N, far below the 3000 N ram in the same brand
5.0 from one review and no saved text
No duty percentage
5 A and 40–50 W are both printed
Best for: The load is within 400 N and you need a long, fairly quick 12 V stroke with IP65 printed.
Less suitable: You are lifting against a heavy hatch or you wanted the 3000 N figure at a higher speed.
Why is the force so much lower than the 3000 N ram?
This listing pairs 400 N with 34 mm/s no-load speed and a 550 mm stroke. The 3000 N listing in the same brand is 5 mm/s. Both figures are the seller's numbers.
What has to fit when it is closed?
Retracted length is 700 mm and extended length is 1250 mm. Weight is 1.86 kg. Two brackets are included.
Is the 5.0 based on review text in the file?
The star line is 5.0 from 1. The saved listing has no review text.
The JQDML 700 mm ram is £89.99, the dearest screw ram in the set, for 300 N at 45 mm/s on 12 V. Closed length is 820 mm and open length is 1520 mm, so the body is long before the rod moves. The title says waterproof and the spec says IP54, which is splash protection, and the duty line is 10% with no time window. It is the only listing here that names wire colours: blue to positive and brown to negative to extend. Load current is 4.5 A, working power is 40 W, and the page suggests a 12 V 10 A supply. The star line is 5.0 from one review and there is no review text. A controller is not included. You are paying more than the 3000 N ram for speed and stroke, at about a tenth of that push, and the waterproof word does not upgrade IP54.
Pros
700 mm stroke at 45 mm/s, the fastest no-load speed here
Closed and open lengths printed, 820 mm and 1520 mm
Wire colours stated for extend and retract
10% duty and a 12 V 10 A supply suggestion are printed
Cons
300 N only
Title says waterproof and the spec says IP54
£89.99, above the 3000 N ram, on a 5.0 from one review with no text
4.5 A and 40 W do not agree at 12 V
Best for: You need a long, fast, light 12 V stroke and you will follow the blue and brown note on this listing only.
Less suitable: You need 3000 N, jet protection, or a price below the slower heavy ram.
The Justech 12 V ram is £28.99, and the amazon.co.uk line is 4.4 from 146 reviews, the largest count in this set. The title says 1000 N and 12 in, while a bullet says 3000 N or 660 lb and does not restate the stroke, so you cannot pick one force from the page. No-load speed is 5 mm/s and the loaded speed is printed at 3.5 mm/s, which is the only loaded speed in this comparison. IP65, limit switches, and a manual are stated, and closed length is not. In the saved text the two reviews labelled United Kingdom are both short and negative: one says it would lift a couple of feathers, and one says it worked for a day. The rest of that file is labelled Germany, France, the United States, and elsewhere, so 146 is not a UK-only sample. At this price the conflict on force is the reason to leave it, unless you already know which figure is on the unit you will receive.
Pros
£28.99 with IP65, end stops, and a manual in the box
4.4 from 146 reviews, the largest count here
Both a no-load speed (5 mm/s) and a loaded speed (3.5 mm/s) are printed
Mounting stents and pins are included
Cons
Title says 1000 N and a bullet says 3000 N
Closed and open lengths are not in the file
Both saved UK-labelled reviews are negative
The 146 reviews are not a UK-only set
Best for: You have already confirmed which force is on the unit in your hand and you only need the 12 in title stroke.
Less suitable: You are choosing between 1000 N and 3000 N from the listing text, or you want a UK review that describes a successful fit.
The title says 1000 N. A bullet says 3000 N / 660 lb. Both are printed. The page does not choose between them.
Are the 146 reviews a UK-only set?
The star line is 4.4 from 146 on the amazon.co.uk page. In the saved text, two reviews are labelled United Kingdom and both are negative. The others are labelled Germany, France, the United States, and elsewhere.
What protection does the bullet claim?
IP65, limit switches, self-locking, and over-current, overload, and over-voltage protection. One non-UK review says it did not cut out on overload.
The JQDML 300 mm ram is £57.99 for a stated 3000 N push at 5 mm/s on 12 V, closed at 430 mm and open at 730 mm, and the amazon.co.uk line is 4.2 from 40 reviews. UK texts in the file describe a solar tilt and a camper bed, and more than one of them calls the rod slow. One buyer timed about a minute for full extension, which matches 300 mm at 5 mm/s as arithmetic from the listing. The same file includes a UK buyer who reports three units that died while the power was off. IP65 is printed, and the listing still says to add protection for long-term outdoor use. Duty is 10% with no time window, a remote and a 12 V 5 A adapter are not included, and the page also prints brass against an aluminium-alloy bullet plus 5 A beside 40–50 W. It is the least incomplete heavy ram here, if you can accept the pace and that failure report.
Pros
3000 N push, 300 mm stroke, and 5 mm/s on one listing
Closed length 430 mm and open length 730 mm
4.2 from 40 reviews, with UK texts on solar tilt and a camper bed
IP65, end stops, a hold claim, and a 10% duty line
Brackets included
Cons
UK reviews repeatedly call it slow
One UK buyer reports three units that failed while powered off
Brass versus aluminium, and 5 A beside 40–50 W
Remote and 12 V 5 A adapter are not in the box
Best for: You need a slow, high-force 12 V push over 300 mm and you have read the powered-off failure review.
Less suitable: You need a fast rod, a controller in the box, or a ram with no reported sudden failures.
Retracted length is 430 mm and extended length is 730 mm, for a 300 mm stroke. No-load speed is 5 mm/s.
Does IP65 mean leave it out in all weathers?
The listing says IP65 and also says to add protection for long-term outdoor use. It mentions dust, splashing, and light humidity.
What do the UK reviews repeat?
The star line is 4.2 from 40. Saved UK reviews praise limit switches and strength on solar tilt and a camper bed, and they repeatedly call it slow. One buyer reports three units that died while powered off.
This JQDML unit is £59.99 and it shuttles rather than extending and staying there. Stroke adjusts from 30 mm to 150 mm, the title speed is up to 120 rpm on 24 V, and a speed regulator is in the box. The star line is 4.2 from 15 reviews, and the saved texts are labelled United Kingdom. Buyers describe a chapel bell, an arts lab, and a push that stayed useful through the cam. One of them says the potentiometer on the supply was unwired, so the actuator started at full speed, and they treated that as an injury risk and replaced the supply. There is no single newton rating, no IP mark, and no claim that it holds a load when you switch it off. Another buyer wanted more stroke and more torque than this range gives. It belongs in a workshop motion job, and it is the wrong part if a hatch has to stay open.
Pros
Adjustable stroke from 30 mm to 150 mm
Speed regulator included, up to 120 rpm
4.2 from 15 reviews, with UK texts that describe real jobs
£59.99 for a shuttle rather than a holding ram
Cons
Will not hold a hatch or a panel
No newton figure and no IP mark
One UK review: the potentiometer was unwired and it started at full speed
The supplied power supply was called poor
Best for: You want a 24 V crank that keeps moving, with a stroke you can set between 30 mm and 150 mm.
Less suitable: You need the rod to stop and hold, or you need a printed force in newtons.
No. The listing is a reciprocating actuator with an adjustable stroke from 3 cm to 15 cm and a maximum of 120 rpm. A speed regulator is included.
What force is printed?
No single newton rating. The bullet says torque changes with stroke and speed: shorter stroke, higher torque; higher speed, higher torque.
What did UK reviews say about the supply?
The star line is 4.2 from 15. One UK review says the actuator was fine for an arts lab but the potentiometer was unwired, so it started at full speed. Another wanted more stroke and torque.
This JQDML crank is £68.99, with an adjustable stroke from about 30 mm to 150 mm, thrust printed as 3–40 lb, and a maximum of 120 rpm at 24 V. A speed regulator is included, and the star line is 4.0 from 10 reviews. One UK review says the motor was too weak for that job. Another describes a mains lead that looked too thin, with both cores grey, a fuse without quartz sand, and a Kitemark with a backwards S. The spec block does not state an AC input for this ASIN, so that plug is a review report rather than a printed supply. There is no IP mark and no hold claim, which is what you would expect from a shuttle. A sibling listing states the opposite relationship between speed and torque, so the thrust rule is not consistent across the brand page. Treat the plug description as a reason to inspect any mains lead before you use it, not as a lab finding.
Pros
Thrust stated as 3–40 lb, with stroke adjustable to 150 mm
Speed regulator in the box
4.0 from 10 reviews, three of them saved as UK texts
A 775 motor with a cooling fan is named
Cons
One UK review says the motor is too weak
One UK review describes a mains plug with a dubious mark
The spec does not state an AC input
No IP mark, and it will not hold a static load
Best for: You want a 24 V shuttle in the 30–150 mm band and you will check any mains lead before you plug it in.
Less suitable: You need a holding ram, or you will not inspect a plug that a review has already queried.
Stroke adjusts from 1.18 in to 6 in. Thrust is 3–40 lb, with a stated maximum of 40 lb. Maximum no-load speed is 120 rpm at 24 V.
Does the spec say the supply is mains?
No AC input is printed for this ASIN. The package is the actuator and a speed regulator. A UK review describes a mains lead and rejects the plug.
What did that UK review say about the plug?
One of three saved UK reviews says the lead looked too thin, both cores were grey, the fuse had no quartz sand, and the Kitemark had a backwards S. Another review says the motor is too weak. The star line is 4.0 from 10.
The DTGN mini ram is listed at £21.99 for a 125 mm stroke, 128 N, and 4 mm/s on 12 V, with the body at 188 mm closed and 313 mm open. The only amazon.co.uk review, which makes the 4.0 line, calls it powerful for the size and says 12 V was easy to power. That same review says the box had no instructions, so the wiring came from videos. IP54 is the printed mark, splash protection rather than a soak, and the bullet still names indoor and outdoor use. Brackets, screws, and nuts are included, and a controller is not. At 128 N this is a light job, and one review is too thin to treat as a durability record. You would move on if the hatch needs more than 125 mm of travel.
Pros
£21.99 with stroke, closed length, 128 N, and 4 mm/s all printed
IP54, built-in end stops, and a hold claim
Two brackets, screws, and nuts in the box
The only review says 12 V was easy to power
Cons
4.0 from a single review
No instructions, so that buyer used videos for the wiring
128 N and 125 mm only suit a light, short movement
No current or duty figure
Best for: You need a short 12 V ram for a light hatch or panel and 125 mm of travel fits the shut gap.
Less suitable: You need hundreds of newtons, a documented duty cycle, or a review sample larger than one.
This JQDML kit is £133.99, the top price in the set, and the saved listing has no Customer Reviews line, so there is no star rating to lean on. You get a reciprocating actuator, a stand that adjusts from 0 to 180 degrees, a speed controller, and a 100 mm suction cup. Input is stated as AC 100–240 V with output DC 1–24 V, and the title also says 24 V. Thrust is 3–40 lb and speed is up to 120 rpm, which is the same band as the cheaper cranks, plus the stand. A bullet says non-stop running and does not give a duty percentage. Item weight is 3.7 kg and a motor net weight of 3.32 lb is also printed, so the mass is two figures. There is no IP mark and no hold claim. You are paying for the bench hardware, and you have no review text to say whether the plug or the cup behaved.
Pros
Stand, speed controller, and a 100 mm suction cup in the box
AC 100–240 V input is stated, unlike the cheaper crank
Stroke about 30–150 mm and thrust 3–40 lb are printed
Cons
No amazon.co.uk star line and no saved review text
£133.99 for the same thrust band as cheaper shuttles
Two weight figures, and a continuous-running claim with no duty percentage
It will not hold a static load
Best for: You want a bench shuttle with a stand and a stated mains input, and you accept a listing with no reviews.
Less suitable: You need review evidence, a holding ram, or a lower price for the same 3–40 lb band.
One reciprocating actuator, an upgraded stand with a 0–180 degree adjustment, a speed controller, and a 10 cm suction cup.
What supply does the listing state?
Input AC 100–240 V and output DC 1–24 V. The title also says 24 V. Thrust is 3–40 lb and maximum no-load speed is 120 rpm.
Is there an Amazon star rating in the saved listing?
No Customer Reviews line is present, so there is no star rating and no saved review text.
How we compared
Eleven amazon.co.uk listings were scored from the shelf on 19 October 2026, with notes applied on 21 October 2026. This is not a lab test. A newton figure, an IP mark, a duty percentage, or a waterproof word in a title is a listing claim. These rows are screw rams or crank shuttles, not direct-drive linear motors. A one-review 5.0 does not outrank a larger count, and a title that disagrees with a bullet does not get full marks for fit.
1
Amazon evidence
25%
The amazon.co.uk star rating is divided by 5, then multiplied by 25 and by a count factor. The factor is 1.0 at 40 reviews or more, 0.75 from 15 to 39, 0.50 from 8 to 14, 0.25 from 3 to 7, and 0.12 for one or two reviews. No star line scores 0. Half values round up.
2
Listing fit
40%
A clear mechanism, stroke with a closed and open length, a force figure, a speed, a voltage, an IP mark, and a duty line you can read as printed. A title that fights a bullet, a current and a wattage that do not agree, or a missing speed or IP mark, lowers this part.
3
Review outcome
20%
UK themes about whether the rod did the job, how slow it felt, and whether it failed. One or two reviews, or a star line with no saved text, cannot take the full 20. A large count that is mostly labelled outside the United Kingdom is not a UK sample.
4
Value
15%
Shelf price against the job the listing actually supports. The lowest price does not win when the force line contradicts itself. The dearest kit does not win with no star line. A complete mini spec at the bottom of the set can still be the value row.
Independent review
Last updated: 22.10.2026
8 sources checked
Linear motor buying guide
Start with the mechanism, then stroke and closed length, then force and speed as a pair. Voltage, ingress and duty come after. The notes below follow that order for these 11 amazon.co.uk listings, checked on 19 October 2026. None of the scores is a lab test.
What is a linear motor?
On amazon.co.uk, a linear motor in this category is an electric linear actuator. A DC motor drives a screw that pushes a rod, or a crank shuttles. It is not a direct-drive magnet-track motor. UK buyers use these parts for hatches, vents, camper beds and occasional panel tilt. A usable listing states stroke, retracted length, force in newtons, speed, voltage and an IP mark together.
Best for
A camper or hatch where you can fit brackets and you accept a slow, high-force 12 V push
A workshop motion that must keep shuttling, with a speed regulator in the box
A short, light panel or hatch where 125 mm and about 128 N are enough
Not ideal for
A powered gate, a barrier, or anything that lifts a person
A buyer who reads waterproof into IP54 or IP65, or who needs two rams to stay level
A joint into the fixed 230 V installation, which is work for a competent person
Mistakes to avoid
1
Reading waterproof into the IP mark
IP65 is dust-tight and protected against water jets. IP54 is dust-protected and splash-proof. Neither mark is immersion. A title that says waterproof does not raise an IP54 line, and one IP65 listing still says to add protection outdoors.
2
Buying the fast ram for a heavy push
In this 12 V family, 3000 N is listed at 5 mm/s and 300 N at 45 mm/s. The printed newtons assume a guided, axial load. The fast rod will not do the heavy job.
3
Ignoring retracted length or a one-review 5.0
If the closed length does not fit, the stroke does not matter. A 5.0 from one review, with no saved text, is weaker than 4.2 from 40. A 10% duty line with no time window is not a pump.
What to weigh up
Stroke, force and speed
High
Decide whether the rod must hold. The screw rams here run from the DTGN 125 mm at 128 N and 4 mm/s to the JQDML 300 mm at 3000 N and 5 mm/s, the 450 mm at 1500 N and 10 mm/s, the 550 mm at 400 N and 34 mm/s, and the 700 mm at 300 N and 45 mm/s. Closed length is printed on those JQDML rams and on the DTGN. The Justech title says 12 in and does not print a closed length, and it says 1000 N in the title and 3000 N in a bullet.
Voltage, ingress and the review file
High
Match 12 V or 24 V to the supply you already have. The JQDML 300 mm, 450 mm and 550 mm rams print 5 A and 40 to 50 W together, which do not agree at 12 V. The 700 mm listing is the only one with wire colours: blue to positive and brown to negative to extend. IP65 is printed on the 300 mm, 450 mm, 550 mm and Justech rams. IP54 is printed on the minis and on the 700 mm, whose title still says waterproof. A 10% duty line, with no time window, is printed on the 300 mm and the 700 mm.
Which option suits you?
Three typical situations, each with a recommendation from this comparison.
🚐
A camper bed or a heavy hatch
You can fit brackets and a reversing switch, and you have measured a 430 mm closed length. The JQDML 300 mm ram is about £57.99, with 4.2 from 40 reviews, at 3000 N and 5 mm/s. UK reviews call it slow, and one reports three failures while the power was off.
You want a crank that shuttles, not a ram that holds a hatch. The JQDML reciprocating actuator is about £59.99, with 4.2 from 15 reviews, stroke from 30 mm to 150 mm, and a speed regulator in the box. One UK review says the potentiometer was unwired, so it started at full speed.
You need about 125 mm of travel and the load is within 128 N. The DTGN mini is about £21.99, with IP54, brackets and screws in the box. The only review is 4.0, and that buyer had no instructions.
On amazon.co.uk this search returns electric linear actuators: a DC motor and a screw, or a crank that shuttles. It is not a direct-drive magnet-track linear motor. A usable listing states stroke, retracted length, force, speed, voltage and an IP mark together. UK buyers use them for hatches, vents, camper beds and occasional panel tilt. A 5.0 from one review is weaker evidence than a larger count. A newton figure on the page was not measured for this comparison.
Which listing is the top pick?
The top pick is the JQDML 300 mm ram, about £57.99, with 4.2 from 40 amazon.co.uk reviews and a score of 81. It states a 3000 N push at 5 mm/s, a closed length of 430 mm, IP65 and a 10% duty line. UK reviews describe solar tilt and a camper bed, and they call the rod slow. One buyer reports three units that failed while powered off. The score is not a lab test.
Which listing is best value?
The best value is the DTGN 125 mm mini at about £21.99, with a score of 60. Stroke, a closed length of 188 mm, 128 N, 4 mm/s and IP54 are all printed, and brackets and screws are in the box. The star line is 4.0 from one review, and that buyer had no instructions. At 128 N it suits a light, short movement. It is the wrong row if you need hundreds of newtons or a larger review sample.
When should you buy a screw ram instead of a crank?
A screw ram extends, stops, and is often claimed to hold a hatch or panel. A reciprocating unit shuttles and will not hold a load. In this set the crank stroke is about 30 to 150 mm, up to 120 rpm, with a speed regulator in the box. Choose the crank when the motion must keep going. Choose a screw ram when the rod has to stay out. One UK review of a crank says the speed control was unwired, so it started at full speed.
Does IP65 mean the ram can be left underwater?
No. Under IEC 60529, IP65 means dust-tight and protected against water jets. It does not mean immersion. IP54 means dust-protected and protected against splashing. A title that says waterproof, while the spec says IP54, has not upgraded the mark. One IP65 listing in this set still tells you to add protection for long-term outdoor use. Do not read a soak test into either code.
How do you reverse a 12 V ram?
Most of these rams reverse by swapping the two supply wires, and a controller is not in the box. Only the 700 mm listing names colours: blue to positive and brown to negative to extend. Those colours do not apply to the other listings. Several rams print 5 A and 40 to 50 W, which do not agree at 12 V. The how to wire a linear motor page covers polarity, the fuse and what is missing. A joint into the fixed 230 V installation is for a competent person.
Can one of these rams drive a gate or tilt a solar panel?
HSE guidance on powered gates means a 1500 N or 3000 N ram is not a gate kit, and it is not a care-bed device. Call a professional for a powered gate or barrier, for anything that lifts a person, and for a lid whose wind or fall load you cannot calculate. Two UK reviews on the 300 mm ram describe a ground-mounted panel tilt, and neither calculates wind. Panel listings are a separate job on the solar panel comparison. This page claims no solar yield gain.
What if the title and a bullet disagree on force?
The Consumer Rights Act 2015, sections 9 and 11, covers goods that are not as described. The Justech listing says 1000 N in the title and 3000 N in a bullet, at about £28.99. Both figures are printed, and this comparison does not pick 3000 N over 1000 N. The star line is 4.4 from 146 reviews, and the two saved UK-labelled reviews are negative, so 146 is not a UK-only sample.
Our verdict
In this set of 11 amazon.co.uk listings, the top pick is the JQDML 300 mm ram at about £57.99, with 4.2 from 40 reviews and a score of 81. It states 3000 N at 5 mm/s, a closed length of 430 mm, IP65 and a 10% duty line. The best value is the DTGN 125 mm mini at about £21.99, score 60, with stroke, 128 N, 4 mm/s and IP54 printed at the lowest price. The star line is 4.0 from one review, and that buyer had no instructions. Neither score is a lab test, and these rows are screw rams or crank shuttles, not direct-drive linear motors.
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Updated: 22.10.2026
8 sources checked
Guides to linear motors
Guides on what to look for, how to use a product, and common mistakes.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the UK listings checked on 19 October 2026. We did not lab-test these linear motors.