Guide Bushings & Adaptors
for your Router

All Leigh Dovetail & Box Joint Jigs require a router with a 1/2" collet, fitted with a Leigh guide bushing. Your router may need a guide bushing adaptor.
Click on the selector below to determine your router adaptor requirements.

Leigh Guide Bushings

Leigh guide bushings are designed around the industry standard — a threaded bushing and nut having the dimensions shown. Some routers accept these bushings directly or come with an adaptor. For those that don’t, Leigh offers several adaptors shown in the Guide Bushing Adaptors chart below.

To determine if your guide bushing fits directly to your router, measure the opening in the bottom of your router.
The widest part, or counter bore, of the opening must be 1-3/8" and the inner hole must be 1-3/16". If the opening matches these dimensions, you do not need an adaptor. For all other opening sizes, refer to the guide bushing adaptor selector.


• e7 elliptical guide bushing, 7/16” OD [11,1mm]
Included with Leigh D4R Pro, Super Jigs and Box/Finger Joint Templates for routing dovetails and box joints. Also use with the RTJ400 for routing half pitch through dovetails.

• 711C guide bushing 7/16” OD [11,1mm])

Alternative to e7, but only for routing through and half-blind dovetails on Leigh D4R Pro, D-series and Super Jigs.

• e8 elliptical guide bushing, 1/2" OD [12,7mm]
Use only on Leigh F3, F24 and F18 Box/Finger Joint Templates.

• e10 elliptical guide bushing, 5/8” OD [15,9mm]
Use on the Leigh RTJ400, B975 and F3, F24 and F18 Box/Finger Joint Templates.

• 716C guide bushing, 5/8” OD [15,9mm]
Use for 1/2" [12,7mm] shank through dovetail bits on Leigh D4R Pro and D-series jigs.


711TP (7/16” OD) and 716TP (5/8” OD) guide bushings were discontinued and have been replaced by the 711C and 716C.

Guide Bushing Adaptors
for your Router

Because the router industry isn’t standardized, you may need an adaptor to fit your Leigh guide bushing to your router. Leigh offers several adaptors as shown. To determine the correct adaptor for your router, use the Guide Bushing Adaptor Selector in the next section.

To see a full list of routers and guide bushing adaptors
click on this chart

Use this Selector to determine your router adaptor requirements.

Guide Bushing Adaptor Selector

Select your Router Brand and Model:
  • Select Router Brand:
  • Select Router Model:

If your Router Isn't Listed, Click here.



7/16" OD Elliptical Guide Bushing
Item e7



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7/16" OD Guide Bushing
Item 711C



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1/2" OD Elliptical Guide Bushing
Item e8



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5/8" OD Guide Bushing
Item 716C



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5/8" OD Elliptical Guide Bushing
Item e10



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702 GBS Adaptor
Item 702



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705R GBS Adaptor
Item 705R



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702R GBS Adaptor
Item 702



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706R GBS Adaptor
Item 706R



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703 GBS Adaptor
Item 703



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710 GBS Adaptor
Item 710



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704R GBS Adaptor
Item 704R



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721 GBS Adaptor
Item 721



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RA1129 Template
Guide Set
Item RA1129
Includes template
guide adaptor RA1100
and adaptor (holder)



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730V Pin Wrench
Item 730v
For use with Leigh
guide bushings.



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Leigh 709 – 3/8” OD
Guide Bushing
Item 709
For general template
routing, not for use on
Leigh Jigs. Fits adaptors
702 and 703 only.



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2 for 1 offer!
Reg. $12 each

Router Requirements

What Router Should I Use?

Leigh recommends a midsize router, from 1-1/2 to 2-1/4 HP (9-13 amps) with a 1/2" collet. This size provides great power to weight ratio. Fixed base routers are ideal because they have a lower center of gravity with handles mounted to the router base rather than the motor, as with plunge routers. However, if you are proficient with the use of a plunge router, it works just as well. A plunge router is recommended for Isoloc Templates and is required for the M2 Attachment. When buying a router, also consider ergonomics, switch location, a good plunge mechanism and easy, accurate adjustment of bit height.
Router Collets

3/8", 8mm and 1/4" bits require the use of a collet reducer, or a collet that matches the bit size. See video >

Guide Bushing Adaptors for your Router

All Leigh Dovetail & Box Joint Jigs need a router fitted with a Leigh guide bushing. Because the router industry isn't standardized, you may need an adaptor to fit the guide bushing to your router. Learn more >

If your Router isn’t Listed

Router Size Review these router variations to accurately measure your router base.

Distance between screws and centers
Inside diameter

Email the following to [email protected]

  • A photo of the router base
  • The brand/model of your router
  • Inside diameter of the recess for the adaptor
  • Distance between the screw hole centers
  • Depth of recess that the adaptor fits into


More on Guide Bushings

Why does Leigh use guide bushings, not bearings? Conventional guide bushings are much more versatile than shank mounted bearings. Bearings severely limit the range of board thicknesses, joint sizes and pin/tail spacing. Shank mounted bearings cannot provide the precise fit adjustments possible with Leigh’s elliptical guide bushings and the VGS.
Why does the barrel length matter? Some manufacturer’s guide bushings have very short barrels and are not recommended for Leigh dovetail jigs. The barrel length on Leigh guide bushings is .265" (just over 1/4"). Shorter barrels or barrels recessed in the router base may cause the router bit to come in contact with the finger assembly.
What is the Leigh VGS?
Leigh’s Variable Guide Bushing System was designed for use only on Leigh Isoloc Templates and F1 and F2 Finger Joint Templates, for accurate adjustment of joint fit. Learn more about the VGS.