Screwdriver Bit Torx T40 Wera 867/1 BDC SB SiS, diamond-coated, alloy tool steel, D 6.3, 1 pc

Wera Torx bit T40 867/1 BDC SB SiS is a single Torx T40 screwdriver bit with a 25 mm working length and a 6.3 mm (D6.3) shank diameter. Manufactured from alloy tool steel, this BiTorsion Diamonad Coated (BDC) bit combines a softer torsion zone with a diamond coating to reduce slip and extend service life. It is intended for use with bit holders, screwdrivers and power tools for assembly, maintenance and repair tasks.

Advantages

The BiTorsion design reduces the shaft hardness by roughly 20% relative to the driving tip, which limits twisting of the tip under peak loads and reduces premature wear. The diamond coating provides improved bite into the screw head to reduce cam-out without damaging the fastener. As a result, the bit offers longer lifetime and increased productivity during machine-assisted or manual fastening operations.

Suitable for

• Assembly and production fastening with Torx T40 screws
• Maintenance and repair work requiring reliable torque transfer
• Use with bit holders, hand screwdrivers and power screwdrivers/drills

Key specifications

• Type: TORX® bit, T40
• Manufacturer / model: Wera 867/1 BDC SB SiS
• Coating: Diamond-coated (Diamonad)
• Material: Alloy tool steel
• Working length: 25 mm
• Shank diameter: 6.3 mm (D 6.3)
• Quantity: 1 pc

How to use

Insert the bit into a compatible 6.3 mm bit holder or screwdriver chuck until it locks. Select appropriate torque and speed settings on the power tool to match the screw and material. Apply steady axial pressure while driving the screw to maintain contact between the diamond-coated tip and the fastener head. Inspect the bit periodically for wear and replace when tip geometry deteriorates.

Usage recommendations

For best results, use the Wera 867/1 BDC bit at controlled torque settings and avoid excessive impact that can exceed the torsion zone design limits. Store the bit dry and clean to preserve the diamond coating and check compatibility with coated or soft fasteners before extended use.