Haimer Collet Chuck ER 11 Ultra short, HSK-E50 Tool Holder E50.025.11 (0840285)

Haimer Part Number: E50.025.11

HAIMER is a global leader in tool holding, balancing, and presetting technology. Founded in 1977 and headquartered in Igenhausen, Germany, HAIMER offers premium shrink fit chucks, tool balancing machines, and precision tool holders trusted in high-performance machining environments worldwide.

This product is priced singly and comes in packs of 1.

Please note that the actual item may not be/look exactly the same as shown in the item picture(s).

Product Features:

- Collet Chuck Type ER, DIN 69893-5, HSK-E50

- Chuck body fine balanced G2.5 at 25.000 rpm or U < 1 gmm

- All functional surfaces fine machined

- More accurate than DIN

- For clamping tools with cylindrical shank in ER collets according to ISO 15488.

- DIN 69882-6

- Without thread for back-up screw

- With locknut type HS (High-Speed, fine balanced, with slide coating for higher clamping forces)

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Background Information:

The HSK system was invented in Germany in the 1990's and is now very commonly found in European machine tools and spindles. HSK stands for "Hohl Shaft Kegel" - "Hollow Shank Taper", and as the name implies this type of interface has a cavity running through it. Unlike classical 'pull-stud' designs (CAT, BT, SK etc), HSK uses an internal drawbar mechanism which results in clamping force increasing with rotational speed. Additionally, the form features dual contact; on an axial face and the cone (1:10), which puts HSK in the upper echelons of tool holder performance.

The HSK-E form is designed for extreme speeds; with all sources of unbalance removed. This type still has a ring feature for automatic tool changing, but does not have any feature for integrating RFID chips

The ER tool holder system was invented by Fritz Weber, founder of Rego-Fix, and released in 1972. The ER-type system was originally used as a broom head to handle interface! The R in "ER" stands for Rego-Fix, and represents the company's modification to common "E" collet design of the early 20th century. Specifically, the modification was adding a groove to the collet which keeps it captive in the nut while installing/removing; eliminating the problem of collets getting stuck in the holders. Upon patent expiry the system was standardized in 1993 under DIN 6499 and is today the most recognizable and commonly used collet system worldwide.

The classic ER interface, tried and true.

Company History:

Family-owned since 1977, HAIMER has grown from a precision parts specialist into a global tooling solutions supplier with operations across Europe, North America, and Asia.