Expert advice available from time served engineers.
Click to view our current special offers.
We offer free carriage on all orders over £39 to mainland UK.
Click to view our current special offers.
Chat with us either by phone, online or email.
Click to view our current special offers.


Product SKU: ...MT3-ER40-75
£33.36 ex VAT £40.032 incl. VAT

1-2 days
subject to


subject to availability

Features: more

Product Information


  • ER40 Collets available in standard, high and ultra-high precision (<15, <10 and <5 micron runout, respectively)
  • G6.3 Balanced at 15,000 RPM
  • MT3 (DIN228) - 75mm gauge length
  • Suitable for use with coolant sealed collets
  • Stocked for next day delivery
  • ER Collet Size: ER40
  • Morse Taper: MT3
  • Gauge Length: 75mm

ER40 collet chuck for use in Morse taper 3 (MT3 - DIN 228) spindle tooling systems - 75mm gauge length with standard nut. Balanced to G6.3 at (15,000RPM). ER collets are the world's most widely used clamping system, owing to their exceptional precision and strength when clamping cylindrical objects. Due to the manner in which the clamping force is exerted evenly around the tool from all directions, clamping using ER collet chucks does not suffer anything like the level of runout inherent with the use of most other tool holding systems and can be used in a wide array of high precision machining applications.


The series number is the opening diameter of the tapered receptacle, in millimetres. ER collets collapse to hold parts up to 1mm smaller than the nominal collet internal size in most of the series (up to 2mm smaller in ER-50, and 0.5mm in smaller sizes) and are available in 1mm or 0.5mm steps. Thus a given collet holds any diameter ranging from its nominal size to its 1mm-smaller collapsed size, and a full set of ER collets in nominal 1mm steps fits any possible cylindrical diameter within the capacity of the series.


Tool Holding:Spindle Tooling
Category:Tool Holding
ER Collet Size:ER40
Morse Taper:MT3
Gauge Length:75mm
Spindle Tooling:ER Collet Chucks
Taper:Morse Taper
ER Collet Size:ER40
Gauge Length:75mm

Service & Delivery Information

What delivery options are available?

We offer free shipping to mainland UK on all orders over £79 ex VAT.

Delivery to Ireland, Northern Ireland, Scottish Highlands etc may incur additional charges.

Please see our delivery page for a full breakdown

Can I cancel or return the goods?

You are able to cancel or return the goods of items that we stock. Goods which are ordered in from supplies specifically for your order will be subject to a restocking fee.

Can I apply for a credit account?

We are able to offer businesses trade accounts subject to a soft credit check.

Please contact us if you would like to set up a trade account.

How do I track my order

Tracking details will be emailed for all orders sent tracked once the goods have been shipped. This will include a link to the relevant couriers website.

Alternatively, you can also contact us who can track the order for you.

I still have a query, how can I get in touch?

Please contact us if you have any questions regarding this product or any other product or service

You can contact us by:

  • Phone: 01274 872822
  • Email:
  • Online chat

Have a query?

Speak to one of our advisers today for expert advise.

01274 Online Now!