KRONTRA

ER collet range

Choose the ER series first

Review ER11 through ER40, then send the nominal bore size, quantity and machining application for exact product confirmation.

Choose your ER series

ER11 to ER40 at a glance

Compare the reference body size, then open the relevant series page to send the nominal bore and application.

View size guide →
KRONTRA ER11 through ER40 reference overall body size guide
Reference overall diameter × overall length. Confirm the exact specification before ordering.

Series directory

Open the matching family

Body size helps identify the series. The nominal bore, tolerance request and holder compatibility are confirmed separately.

01ER11 Collets11.5 mm × 18 mm reference body02ER16 Collets17 mm × 27.5 mm reference body03ER20 Collets21 mm × 31.5 mm reference body04ER25 Collets26 mm × 34 mm reference body05ER32 Collets33 mm × 40 mm reference body06ER40 Collets41 mm × 46 mm reference body
Send your ER requirement →

Not sure which series?

Send the current collet or chuck reference

A model number, photo, drawing or product list can help identify the requested ER family. Do not rely on appearance alone for final compatibility.

Useful information: current ER series, nominal bore, tool diameter, quantity, application, destination and any tolerance or packaging requirement.

Ask for matching support →

ER collet inquiry

Ready to request ER collets?

Send the ER series, bore size and quantity. Add a drawing or product list when useful.

Request an ER quote →Email KRONTRA