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How to set a glue joint router bit

Updated: October 2026

The bit is in the collet and the scrap is on the bench. How to set a glue joint router bit depends on which cutter you bought. An edge bit uses one height, with one board face up and the mating board face down. A finger bit uses two heights. Close the joint on scrap of the same thickness before you touch the boards you mean to keep. If the shank is bent, the tips are loose, or the bit vibrates, you stop. Listings and prices are on the [glue joint router bit comparison](/hub/routers/glue-joint-router-bit). Products Compared did not run this setup. A qualifying purchase can earn a commission at no extra cost to you.

The bit is in the collet and the scrap is on the bench. How to set a glue joint router bit depends on which cutter you bought. An edge bit uses one height, with one board face up and the mating board face down.

Our top picks

Mesee Mesee 1/4 inch finger bit

Best overall

Mesee Mesee 1/4 inch finger bit
8.8/10about £13.99
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Newdeli Newdeli 1/2 inch finger bit

Rank 2

Newdeli Newdeli 1/2 inch finger bit
7.3/10about £21.23
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YONICO Yonico 15136q

Rank 3

YONICO Yonico 15136q
8.1/10about £19.99
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On this page
  1. 1.One height or two
  2. 2.Centre the edge bit
  3. 3.Two heights on a finger bit
  4. 4.Stop

One height or two

Yonico’s bullet is the edge pattern: an edge-to-edge glue joint, and the listing says table-mount. Freud’s UK listing does not name a machine, but review texts from outside the UK describe a router table and a fence. Those two are the one-height cutters. You centre the profile on the stock thickness, then flip one board. You do not cut a second height for the mating edge. A UK review of Mesee says the second cut needs a different bit height. One setting makes one half of the corner. The mating half is a second setting. Which profile you should have bought is on the finger joint versus edge glue joint page.

Centre the edge bit

For Yonico or Freud, centre the profile on that one thickness. Run one piece face up and the mating piece face down, then dry-fit before any glue. If one face sits proud, move the bit by about half the step and cut fresh scrap. A 1 mm step means a move of about 0.5 mm. That half-step rule comes from setup guides. A US review of Yonico says the cut depth changed when the feed pressure was uneven. Freud’s 1.5 inch cutting diameter is the size of the cutter, not a board thickness.
Mesee Mesee 1/4 inch finger bit

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Mesee Mesee 1/4 inch finger bit
8.8/10about £13.99
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Two heights on a finger bit

Set the first height, cut one half of the corner on scrap, then change the height and cut the mating half. The Mesee UK review is the concrete version: the second pass needs a different bit height, and hobby boxes worked once both were set. The bullet’s window is 7/16 inch to 1-1/4 inch, on a table-mounted or CNC router. Vearter and Newdeli put a bearing in the title. A bearing is not a fence on thin stock. One Newdeli review from the United States says the gap from the bearing to the cutter is about 1/4 inch.

Stop

Stop before the first cut if the shank is bent. Mesee’s UK reviews include a shaft bent on arrival and a bit that bent at first use. A bent shank is not a second pass. Consumer Rights Act 2015 section 9 is the contract route. Do not straighten a shank in the collet. The Health and Safety Executive sets a hardwood dust limit of 3 mg/m³ and a softwood limit of 5 mg/m³. A hobby shed with no employees is outside PUWER 1998 regulation 9.

Common questions

Do I centre the bit or change the height for the second piece?
Centre an edge bit, Yonico or Freud, and flip one board so one face is up and one is down. Change the height for a finger bit. A Mesee UK review says the second cut needs a different setting. Using the edge method on a finger bit leaves a step. Using two heights on an edge bit is the wrong pattern for a panel.
Why do I need scrap of the same thickness?
The centre of the cutter has to sit on the centre of the edge you are gluing. Scrap that is thinner or thicker than the real boards will close on the bench and open on the panel. Freud’s review texts, which are not from the UK, repeat that a small height error leaves one board proud. Cut a fresh pair after each height change.
Which way do I move the bit if one face sits proud?
Move it by about half the step, then cut new scrap. If one face stands 1 mm proud, a move of about 0.5 mm is the rule of thumb from the setup guides, not a measurement made on your bit. Check the dry fit again. Chasing the error twice in the same direction puts the step on the other face.
Can I use the bearing instead of a fence on thin stock?
Not on the evidence in the Newdeli extract. One US review says the bearing sits about 1/4 inch back from the cutter, so thin stock never reaches it. Vearter also has a bearing in the title and does not print a gap. Use a fence until the scrap tells you the bearing is actually touching the face.
What do I do if the shank is bent before the first cut?
Do not cut. A bent shank will not true itself, and it can damage the guide, which is what one Vearter text describes. Contact the seller under the Consumer Rights Act 2015. The same applies if you find the bend after a short first cut. A second pass on good timber is how a bent bit becomes a ruined board.
Does the Newdeli 1.26 inch line apply to every bit?
No. That bullet says at least 1.26 inch of the Newdeli shank should be inserted and tightened. The other seven extracts do not print that figure. Trend’s three-quarter rule is for a Trend T5 collet, not a depth for these ASINs. Seat as much straight shank as the collet will close on, and stop if the cutter is hanging out.

Related pages

Glue joint router bit shank size

Glue joint router bit buying guide

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Best glue joint router bit for the collet you have

Finger joint router bit vs glue joint bit, panels or boxes

Sources

Public UK sources for wood dust, employer training, milling-tool safety and satisfactory quality. Prices, stars and review counts are from the amazon.co.uk extracts dated 15 October 2026.

  1. HSE — Wood dust (retrieved 15 October 2026)
  2. PUWER 1998, regulation 9 (retrieved 15 October 2026)
  3. HSE — PUWER overview (retrieved 15 October 2026)
  4. HSE leaflet INDG291(rev1) (retrieved 15 October 2026)
  5. Consumer Rights Act 2015, section 9 (retrieved 15 October 2026)
  6. BSI — BS EN 847-1:2017 milling tools (retrieved 15 October 2026)
  7. General Product Safety Regulations 2005 (retrieved 15 October 2026)