Product Description
CMT Hook Head Insert for ER32 Collet Nuts - 50-55mm (14x18mm Shank) is a precision-engineered torque wrench insert head designed for use with ER32 clamping nuts and compatible interchangeable torque wrench systems in the 20-200 Nm range. This insert gives machinists and CNC router operators a reliable, purpose-built interface for tightening ER32 collet nuts to exact torque specifications - eliminating guesswork and protecting both tooling and workpieces during setup.
Key Features
- Diameter compatibility of 50mm - 55mm - fits ER32 collet nut sizes in that range, ensuring a secure and precise engagement with the nut during tightening without risk of slippage or damage to the nut face.
- 14x18mm square drive shank - mates with the interchangeable torque wrench drive, providing a rigid, play-free connection that transfers torque accurately from wrench to collet nut.
- Hook head insert design - the hook profile wraps around the collet nut for positive engagement, reducing the chance of the tool slipping off and allowing controlled, repeatable tightening in tight machine envelopes.
- Compatible with interchangeable torque wrench systems rated 20-200 Nm - covers the full torque range needed for ER32 clamping applications, giving operators the right tool for everything from light finishing passes to heavy material removal setups.
- Interchangeable insert system - allows a single torque wrench body to serve multiple collet nut sizes by swapping heads, reducing the need to purchase and store multiple complete wrenches.
Why This Product
- Operators working with ER32 collet systems need consistent, calibrated torque on clamping nuts - this insert head provides a dedicated interface for that task, helping to prevent under-tightening (which can cause tool pull-out) or over-tightening (which can damage collet seats and nuts).
- The 50-55mm hook head covers the standard ER32 collet nut outside diameter range, making it a direct fit without adapters or improvised solutions that can compromise torque accuracy.
- Because the insert is part of an interchangeable torque wrench system, shops that use multiple collet sizes can invest in a single calibrated wrench body and add inserts as needed - a cost-effective approach to maintaining proper torque control across different toolholder sizes.
- The 14x18mm drive shank is purpose-matched to the compatible wrench system, meaning torque readings from the wrench translate directly to the nut without mechanical losses that would occur with makeshift adapters.
Specifications
- Manufacturer Part Number: TW-5055
- Brand: CMT Orange Tools
- Description: HOOK HEAD INSERT Diameter = 50-55mm (ER32) S=14x18mm
- Diameter: 50mm - 55mm
- Shank: 14x18mm
- Compatible Collet System: ER32
- Torque Wrench Compatibility: Interchangeable Torque Wrench 20-200 Nm
- Product Class: Router Cutter
What's Included
- 1x Hook Head Insert TW-5055 (50-55mm, ER32, 14x18mm shank)
- Protective case
- Instruction manual
Frequently Asked Questions
What collet nut size does this hook head insert fit?
The TW-5055 is designed to fit ER32 collet nuts with an outside diameter in the 50mm - 55mm range. It is intended for use with ER32 clamping nuts specifically and should not be used with other collet nut standards that fall outside that diameter range.
What drive size does this insert use to connect to the torque wrench?
The insert uses a 14x18mm square drive shank, which is the standard interface for the compatible interchangeable torque wrench system in the 20-200 Nm range. This ensures a solid, play-free connection between the insert and the wrench body for accurate torque transfer.
Can this insert be used as a standalone torque wrench, or does it require a separate wrench body?
This is an insert head only - it is designed to work as part of an interchangeable torque wrench system in the 20-200 Nm range. A compatible torque wrench body with a 14x18mm drive is required separately. The insert allows one wrench body to service multiple collet nut sizes by swapping heads as needed.
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