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250mm blade in a 254mm saw: depth, reach, and what still has to match

Updated: October 2026

The packet says 250 mm and the saw was sold as 254 mm, 255 mm, or 10 inches. A 250mm blade in a 254mm saw is sometimes a small loss of depth and sometimes a cut that misses the deck. It depends on the machine, and it is not a clearance certificate. The Products Compared editorial team wrote this on 16 October 2026 from UK threads, two Axminster manuals, DIYnot, HSE guidance, and these amazon.co.uk listings. We did not measure your saw. The set is the [250 mm x 30 mm circular saw blade comparison](/hub/saw-accessories/250mm-x-30mm-circular-saw-blade). A qualifying purchase can earn a commission at no extra cost to you.

The packet says 250 mm and the saw was sold as 254 mm, 255 mm, or 10 inches. A 250mm blade in a 254mm saw is sometimes a small loss of depth and sometimes a cut that misses the deck.

Our top picks

Saxton Blades Saxton 250 mm 100T

Best overall

Saxton Blades Saxton 250 mm 100T
9.4/10about £21.99
View offer
Saxton Blades Saxton 250 mm 80T

Alternative

Saxton Blades Saxton 250 mm 80T
9.2/10about £19.99
View offer
Tech Traders Tech Traders 250 mm 80T

Best value

Tech Traders Tech Traders 250 mm 80T
9.2/10about £13.99
View offer
On this page
  1. 1.250 mm, 254 mm, and 255 mm are three figures
  2. 2.On a table saw the loss is mostly depth
  3. 3.On a mitre saw the arm may stop short
  4. 4.What still has to match

250 mm, 254 mm, and 255 mm are three figures

254 mm is the 10 inch figure. 250 mm is 4 mm under it. 255 mm is a further millimetre, and on a mitre saw that is often the groove. A title that says the blade fits 255 mm saws is a claim, not a measurement of your arm. Read the plate. The Axminster AP254TS name says 254 and the manual allows 250 mm. The AC254TS is a different model. Saxton 80-tooth and Tech Traders titles say they fit 255 mm saws. The DeWalt DT1957 title says 250 mm and the dimensions cell says 25.4 by 25.4 cm. Leave both. HSE treats a blade under 60 percent of the largest permitted diameter as a kickback risk. 250 mm is about 98 percent of 254 mm, so this gap is not that warning. Teeth sit on the buying guide.

On a table saw the loss is mostly depth

Four millimetres of diameter is about 2 mm of radius. An October 2020 UK Workshop thread, an AC254TS owner on Freud 250 mm blades, drew that reply: about 2 mm less depth is usually not the knife trouble of a drop to 200 mm. Kerf versus knife is still the check. The thread is not a certificate for every saw. At the same rpm a smaller rim is slightly slower. The original poster had that backwards. We quote the direction and invent no speed figure. You still stay at or below the marked speed. 4,150 rpm is that Axminster's mark. If the manual already caps the blade at 250 mm, the remaining job is the knife. A blank listing still has to be measured. The fitting page sets the knife with the power off.
Saxton Blades Saxton 250 mm 100T

Testsieger

Saxton Blades Saxton 250 mm 100T
9.4/10about £21.99
View offer

On a mitre saw the arm may stop short

The head travels on an arc and the teeth have to meet the groove. A 250 mm blade on a 255 mm mitre saw can stop short. DIYnot replies on a Makita of that size say a smaller blade may miss the bed, and the knife gap remains. One UK review of the Saxton 80-tooth says the missing 5 mm left the cut short of the deck groove, against a title that claims a 255 mm fit. One review is not a survey. It is enough to test the claim. With the power off and the bore already matched, lower the head and look. If the teeth stop short, the diameter is wrong for that stroke. Leave the guard and the knife as the saw was built. Tech Traders makes the same 255 mm claim, and the UK texts we used do not test it. Which listing is for which job is the best blade page.

What still has to match

The bore is still 30 mm, or a ring for 16, 20, or 25 mm that is in the box. Saxton and Tech Traders name those rings. The DT1957 does not. Toolzone never prints the bore. The knife still has to be thicker than the plate and thinner than the kerf, within 8 mm. Only one listing prints 6,000 rpm. When the teeth reach, the knife fits, and the bore is proved, a 250 mm blade on a table saw whose manual allows it is the small depth change those replies describe. When a 255 mm mitre saw misses the groove, you want the diameter the manual states. This page does not call 250 mm safe in every 254 mm or 255 mm saw, and it does not claim these listings meet BS EN 847-1.

Common questions

Is 250 mm the same as 254 mm or 10 inches?
254 mm is the 10 inch figure. 250 mm is 4 mm smaller, and 255 mm is a third figure. The AP254TS name says 254 and the manual allows 250 mm. Read the plate.
How much depth do you lose?
On a table saw, one UK Workshop thread discusses about 2 mm less depth. That is not a subtraction for every machine. On a mitre saw the loss can be the bottom of the cut if the arm stops before the groove.
Does a smaller disc spin faster?
At the same rpm the rim is slightly slower, because the circumference is shorter. You still must not exceed the marked speed. Slightly slower is not a reason to turn the saw up.
Why does a 254-named saw allow only 250 mm?
On the AP254TS the parameters are maximum blade 250 mm, arbor 30 mm, 4,150 rpm, knife 2.5 mm, body 1.8 to 2.4 mm, kerf 2.6 to 3.2 mm. The AC254TS lists 254 mm by 30 mm and is a different model. The badge loses when the parameter page disagrees.
Will a 250 mm blade reach a 255 mm mitre groove?
It might not. DIYnot replies on a 255 mm Makita warn that the teeth may miss the bed. One Saxton 80-tooth review says the missing 5 mm stopped short of the deck groove. Lower the head with the power off. If the teeth miss, that blade is the wrong diameter.
What if the cut is already short?
Use the diameter the manual states, or a saw whose manual already allows 250 mm. Leave the guard and the knife fitted. Forcing the head, or removing the knife to gain the millimetres, is outside this method. An unprinted bore, as on Toolzone, is settled before the last 2 mm of depth.

Related pages

250 mm blade for laminate

250mm x 30mm circular saw blade

Best 250mm circular saw blade for the job you have

250mm x 30mm circular saw blade: match bore, then kerf

How to fit a circular saw blade: bore, ring, knife

Sources

Public UK sources and the amazon.co.uk listings used for this comparison; last retrieved on 17 October 2026.

  1. HSE WIS16, circular saw blades (retrieved 17 October 2026)
  2. HSE, circular rip saws (retrieved 17 October 2026)
  3. HSE, wood dust (retrieved 17 October 2026)
  4. HSE, woodworking standards (retrieved 17 October 2026)
  5. HSE, PUWER ACOP L114 (retrieved 17 October 2026)
  6. Axminster AP254TS manual (retrieved 17 October 2026)
  7. UK Workshop, 250 mm blade in a 254 mm saw (retrieved 17 October 2026)
  8. Saxton UK, negative-rake 250 mm 100 tooth blade (retrieved 17 October 2026)
  9. amazon.co.uk listings for the seven blades (retrieved 17 October 2026)