Product Description
CMT Hook Head Insert for ER16 and ER20 Collet Nuts (28-36mm) by CMT is a precision-machined insert tool designed for use with ER16 and ER20 clamping nuts, delivering accurate and repeatable torque application during tool holding operations. With a diameter range of 28-36mm and a 14x18mm drive shank, this hook head insert is built to work with interchangeable torque wrench systems in the 20 to 200 Nm range, making it a dependable solution for CNC machining setups, router cutter installations, and collet nut tightening tasks that demand consistency and control.
Key Features
- Diameter range of 28-36mm - fits both ER16 and ER20 collet nut sizes within a single insert, reducing the number of tools needed for multi-size setups
- 14x18mm shank drive - provides a secure, positive fit with compatible interchangeable torque wrench heads, ensuring accurate torque transfer without slippage
- Compatible with interchangeable torque wrench systems rated 20-200 Nm - supports a broad torque range so operators can apply the correct clamping force for ER16 and ER20 nuts without over-tightening or under-tightening
- Designed for use with ER16 and ER20 collet nut standards - ensures proper engagement geometry with industry-standard collet nut profiles, protecting both the nut and the spindle from damage
- Compatible torque wrench supplied in a protective case with calibration certificate - keeps the calibrated instrument protected and its documentation on hand
Why This Product
- If your shop runs both ER16 and ER20 collet systems, this single insert covers both nut sizes in the 28-36mm diameter range, eliminating the need to purchase and manage separate dedicated inserts for each collet standard.
- The 14x18mm drive interface is engineered to pair with the CMT interchangeable torque wrench system rated from 20 to 200 Nm, giving machinists a complete, matched solution for accurate clamping nut torque without guesswork.
- Using a calibrated, hook-style insert to tighten ER collet nuts - rather than conventional spanners - helps achieve consistent clamping force, which directly supports tool concentricity and reduces runout in router cutter and CNC tool holding applications.
Specifications
- Manufacturer Part Number: TW-2836
- Brand: CMT Orange Tools
- CMT Part Number: CMT-TW-2836
- Description: HOOK HEAD INSERT Diameter = 28-36mm (ER16 and ER20) S=14x18mm
- Product Class: Router Cutter
- Diameter: 28mm - 36mm
- Shank: 14x18mm
- Compatible Collet Standards: ER16 and ER20
- Torque Wrench Compatibility: 20-200 Nm interchangeable torque wrench
What's Included
- Hook Head Insert, 28-36mm, 14x18mm shank (ER16 and ER20 compatible)
- Protective carrying case (when supplied as part of the interchangeable torque wrench system)
- Instruction manual
Frequently Asked Questions
Which collet nut sizes does this hook head insert fit?
This insert is designed to fit ER16 and ER20 collet nuts. Its 28-36mm diameter range covers the hex nut sizes used on both ER16 and ER20 collet chucks, allowing a single insert to serve both standards without switching to a separate tool.
Why is it important to use a calibrated torque wrench when tightening ER collet nuts?
Applying the correct and consistent clamping force to ER collet nuts directly affects tool concentricity and minimizes runout in router cutter and CNC tool holding applications. Using an insert paired with a calibrated torque wrench - rather than a plain spanner - removes the guesswork from tightening and helps protect both the collet system and the cutting tool from damage caused by over-tightening or under-tightening.
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