LÖSNING Tool Locking Device (Retention Knob) — BT40 / BT50

Genuine LÖSNING tool locking devices (pull studs / retention knobs) for BT40 and BT50 taper tool holders, stocked by San Tools in the UAE. These thread into the rear of the tool holder and are gripped by the machine spindle's drawbar mechanism to pull the holder home and lock it in the taper during machining.

Features

• BT40 & BT50 Sizes — matched to the two most common BT taper standards used on Asian-spec machining centres
• Hardened Construction — through-hardened steel body withstands repeated drawbar clamping cycles without deforming
• Precision Thread — accurately cut thread seats fully home in the holder for a secure, repeatable grip point
• Balanced Profile — standard retention-knob geometry keeps spindle balance and ATC (auto tool changer) compatibility
• Direct Fit — drop-in replacement for worn or missing pull studs on existing BT40/BT50 holders

How to Use

• Match Taper Size — confirm BT40 or BT50 to suit your tool holder before ordering
• Thread In Fully — screw the locking device into the holder's rear thread until fully seated
• Torque to Spec — tighten to the holder manufacturer's recommended torque to prevent loosening in use
• Check ATC Clearance — verify the knob profile clears your machine's tool changer gripper
• Inspect Regularly — replace any locking device showing thread wear or deformation from drawbar clamping

Specifications

Type: Tool Locking Device / Retention Knob
Sizes: BT40, BT50
Material: Hardened steel
Brand: LÖSNING
Origin: Imported, distributed by San Tools UAE