< ER Collet Extensions

Collet Extensions ER - Set of 2

Regular price £50.00
Regular price £0.00Sale price £50.00
These precision machined extensions, in 1/4” and 1/2” shanks, provide 50mm of additional height, computer balanced to minimize vibration and ensure perfect concentricity. The multi slit ER collets securely grip over a 1mm range, allowing 6mm, 1/4", 12mm and 1/2" shank router bits to be used.
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Collet Extensions ER - Set of 2
Regular price £50.00
Regular price £0.00Sale price £50.00
  • 3 Year Warranty
  • Multi slitted collet fully grips around the router bit shank for safe, secure routing
  • Engineered from precision ground steel with unrivalled accuracy less than 0.01mm
  • Computer balanced to minimize vibrations ensuring the router bit runs perfectly true
  • Transform router tables, bases and jigs, instantly adding 50mm of height to any router bit
  • 1/4" & 1/2" shank extensions for use with 1/4" & 1/2" shank bits
A router collet extension is perfect to use when an increased height of router bits is needed on router tables, routing jigs or router bases. These extensions give 50mm of additional height and allows you to easily change router bits above your router table. Simply insert the extension into your router, then insert the router bit into the ER engineering collet and secure it by tightening the collet nut.

The 1/4" extension is supplied with a standard 1/4" multi slit ER16 engineering collet and the 1/2" extension is supplied with standard 1/4" & 1/2" multi slit ER20 engineering collets. These collets fully grip around the router bit shank for safer routing with less vibration. The collets are made from heat treated precision ground spring steel which gives a runout accuracy of less than 0.01mm. The 1/4" collets have been specifically designed to grip over a 1mm range from 6.5mm down to 5.5mm meaning both 1/4" imperial and 6mm metric shank router bits can be used in the extension. The 1/2" collet has been designed in the same way to grip over a range from 13mm down to 12mm meaning both 1/2" imperial and 12mm metric shank router bits can be used. The extension body has been precision machined from a single piece of high-quality steel which has been computer balanced to minimize vibrations to ensure the extension and therefore router bit will run perfectly true.

The precision machined bodies alongside the ER16 & ER20 collets are the ideal combination to give extra height to your router bits while maintaining complete accuracy. The set comprises of two extensions, one with a 1/4" shank and one with a 1/2" shank, both have an overall length of 90mm. ©
  • BrandRutlands®
  • Product CodeR5117
  • R5092Collet Extension ER - 1/4" to 1/4"
  • ColletER16 6.5mm – 5.5mm
  • Extension50mm
  • Overall Height90mm
  • Collet Nut Diameter22mm
  • R5093Collet Extension ER - 1/2" to 1/4" & 1/2"
  • 1/4" ColletER20 6.5mm – 5.5mm
  • 1/2" ColletER20 13mm – 12mm
  • Extension50mm
  • Overall Height90mm
  • Collet Nut Diameter28mm

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Customer Reviews

Based on 10 reviews
Michael P.
Collet extensions

Bought these to give me more scope with router bits for my CNC and router table, these are of very high quality they arrived pretty quickly well worth the money another great product from Rutlands

Tim N.

I bought the half inch and the quarter inch set. The half inch version was perfect but the quarter inch version had significant run out. I returned it to Rutlands and they replaced it very quickly with a unit that had no run out. Really useful tools and very handy to have the ER16 and ER20 collets allowing you to purchase different sized collets easily for 6 mm or 8 mm cutters. Would recommend.

Michael L.
Bought these when they were on offer...

Bought these when they were on offer. They are of good quality and well balanced. Very handy when I use the router table to get extra height. It is a shame they do not come with the collet spanners . I had to purchase elsewhere as they were out of stock here at Rutlands

Dana R.
Superb piece of kit - far more versatile than trad...

Superb piece of kit - far more versatile than traditional extensions which only allow one size of shank to be used, as I frequently switch between my 1/2" and 12mm shank bits

Paul S.
Great quality item...

Great quality item. So useful for routing at depth and the collets give superb grip.

Collet Extensions ER - Set of 2

Precision machined bodies

Computer balanced to minimise vibrations and ensure the router bit runs perfectly true.

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2

Collet Extensions ER - Set of 2