Torx screwdriver bit set 4-970

Phillipsfor hexagonal-head screwsfor slotted screws

Product overview

The 4-970 bit set combines five preset torque adapters (0.1–0.6 Nm) with a comprehensive 42-piece C4 bit set and accessories, delivered in a plastic case with foam insert for safe storage and transport. The torque adapters provide an audible click at the preset torque to prevent overtightening; they are primarily intended for manual use and may be used with power tools at a maximum speed of 100 rpm with limited click repetition.

Key features

• Preset torques included; tolerance ±10% (factory certificate available on request)
• Adapter Ø 8 mm, length 22 mm (without shank); max. speed with power tool: 100 rpm
• Drive: 4.0 mm hex shank, magnetic 4.0 mm bit holder
• Material: stainless steel and high-quality tool steel
• Extension: aluminum with 4 mm bit holder
• ESD-handle (dissipative, 10^6 to 10^9 ohm)
• Delivered in plastic case with foam insert
• Case measures: 175 x 160 x 45 mm; Weight: 427 g

Area of application

Convert a 4 mm C4 bit and a holder into a precise torque tool. The audible click indicates when the preset torque is reached and prevents overtightening. When loosening screws there is no torque unlocking (blocked core shaft) — no additional loosening tool is required (approx. 30% higher torque when loosening). Primarily suitable for manual operation; when used with power tools, a maximum speed of 100 rpm with minimal click repetition is recommended.

Technical description

The adapters are tested according to DIN EN ISO 6789 (manually operated torque screwdriving tools) and maintain a tolerance of ±10% for at least 20,000 clicks. The torque value should be checked periodically by the user with a torque meter. The adapter locks the ratchet in the bushing sleeve; the patented system consists of a hollow core shaft and a damping cylinder. When applied torque exceeds the preset value the core shaft becomes inactive so continuous tension on the screw is no longer increased.

Content

• 4-971 torque adapter 0.1 Nm for 4 mm bits
• 4-972 torque adapter 0.2 Nm for 4 mm bits
• 4-973 torque adapter 0.3 Nm for 4 mm bits
• 4-974 torque adapter 0.4 Nm for 4 mm bits
• 4-975 torque adapter 0.5 Nm for 4 mm bits
• 4-976 torque adapter 0.6 Nm for 4 mm bits
• 6-340-3 C4 bit set 42 pcs (slot 1.0–3.0; PH000–PH1; Torx T3–T15; Hex 0.9–3.0; Wrench 2.5–5.0; Triangle; Square S0–S1; Pentalobe P2/P5/P6; SIM-eject; Tri-Point 0–1)
• 6-340-2 bit extension for 4 mm (5/32") hex bits
• 6-340-1 ESD bit holder dissipative for 4 mm (5/32") hex bits
• 4-564 bit adapter 1/4" to 4 mm bits, length 42.5 mm

Technical specifications

• Article / model: 4-970
• Torque adapters: 0.1 — 0.6 Nm (five preset values)
• Tolerance: ±10% (factory certificate available on request)
• Standards: tested to DIN EN ISO 6789 (manually operated torque screwdriving tools)
• Durability: tolerance maintained for at least 20,000 clicks (user should re-check torque periodically)
• Adapter dimensions: Ø 8 mm, length 22 mm (without shank)
• Drive / holder: 4.0 mm hex shank, magnetic 4.0 mm bit holder
• Extension: aluminum with 4 mm bit holder
• Materials: stainless steel and high-quality tool steel
• Handle: ESD-dissipative (10^6 — 10^9 ohm)
• Case: plastic case with foam insert
• Dimensions (case): 175 x 160 x 45 mm
• Weight (set): 427 g
• Recommendation for power tools: max. speed 100 rpm (minimum click repetition)
• Function: adapters cannot be overtightened; no torque unlocking when loosening (increased loosening torque)