RUKO KEB-HM-Weldon-27.0mm SK40 Weldon Tool Holder for 27mm End Mills

For CNC machinists and manufacturing professionals who need a rigid, precise connection between the machine spindle and large-diameter solid carbide end mills, this SK40 Weldon tool holder is built for heavy-duty milling operations. It clamps tools with a 27 mm shank using a side-lock screw, ensuring a secure hold even under high cutting forces.

Key specifications

• Tool holder type: Weldon (side lock)
• Taper interface: SK40 (DIN 69871 AD/B)
• Clamping diameter: 27 mm
• Overall length: 100 mm
• Body diameter: 63 mm
• Material: alloyed case-hardening steel, case hardened 58 ± 2 HRC
• Run-out accuracy: < 3 µm
• Balancing grade: G2.5 at 25,000 rpm
• Coolant supply: internal (AD/B)
• Clamping screw included: M10

Why choose it

The precision-ground body and tight run-out tolerance reduce vibration and improve surface finish, while the case-hardened steel extends service life in demanding production environments. Internal coolant channels direct cutting fluid to the tool tip, enhancing chip evacuation and tool life.

Ideal use cases

• CNC milling machines and machining centers
• Holding solid carbide end mills with Weldon flats
• Heavy roughing and finishing operations

Good to know

This holder conforms to DIN 69871 and is suitable for spindles with SK40 taper. The included M10 clamping screw allows quick tool changes without removing the holder from the spindle.