AccessoriesMade in USA

ER11-04-L

Name: RobbJack ER11-04-L — ER Style Integrated Collet and End Mill Extension Holder
Brand: RobbJack
SKU: ER11-04-L
Price: 283.40 USD
Availability: MadeToOrder

ER Style Integrated Collet and End Mill Extension Holder

ER11 End Mill Extension Holder, 0.125in Hole Diameter, 0.315in Extension Diameter, 0.787in Extension Length

OrderingER11-04-L·Uncoated·$283.40

ER Style Integrated Collet and End Mill Extension Holder — ER11-04-L — Series photo — representative of the ER family

Dimension diagram of an ER solid mill extension: body diameter, extension length, and hole diameter — Dimension reference — labels match the specifications below

Speeds & FeedsDialed to this exact tool — free

Free CAD & DataSTEP 3D DXF 2D ISO CSV CAM library

Cutaway of a RobbJack ER solid mill extension showing the precision-ground ER taper and triangular set-screw grip

Solid ER-mill extensions

Reaches micro tools past fixturing that a standard holder can't clear
Holds exceptional runout at extended reach — TIR under .0002″ at full extension
Beats deflection and chatter on long, small-diameter work
Set screws grip the shank in a triangular arrangement for repeatable accuracy
Internal stop adjusts from both ends with a standard hex key
Precision-ground ER taper twists and snaps into most standard ER clamping nuts — available ER8 through ER25
Coolant-Thru versions available in ER16

From the RobbJack Applications Guide.

About this series

ER Solid ER-Mill Extensions

Reach deep into fixtures without giving up accuracy.

Integrated ER collet-and-extension holders that let miniature and standard end mills clear fixturing and run at extended length while holding exceptional runout — solving the deflection and chatter that come with long, stacked tool assemblies.