Circlip pliers Knipex 44 31 J42 — steel, plastic handles, 310 mm, 465 g

Knipex 44 31 J42 is a 310 mm circlip pliers engineered for fitting and removing external and internal circlips on shafts, bearings and housings. Manufactured from forged chrome vanadium steel and oil-hardened for durability, this solid-style tool features non-slip, solid tips and plastic handles to provide controlled operation during workshop and maintenance tasks. The tool supports a range of application from 8 to 140 mm diameter and weighs 465 g.

Advantages

The forged chrome vanadium steel body and tips offer resistance to wear and deformation under repeated use, while oil hardening improves toughness and service life. Non-slip solid tips provide reliable engagement with circlips to minimise slippage when installing or removing retaining rings. The 45° bent jaws improve access in confined spaces and the plastic handles deliver a balance of grip comfort and control for precision tip movement.

Suitable for

• Installing and removing external circlips on shafts and axles
• Installing and removing internal circlips in bores and housings
• Maintenance and repair work in workshops and service garages
• Mechanical assembly and disassembly where controlled tip precision is required

Key specifications

• Overall length: 310 mm
• Weight: 465 g
• Material: forged chrome vanadium steel, oil-hardened
• Handle: plastic-coated for non-slip grip
• Tip design: solid, non-slip tips, bent 45°
• Application range: suitable for circlip diameters from 8 mm to 140 mm

How to use

Select the correct orientation for internal or external circlips and position the tips onto the circlip ends. Apply even pressure to open or compress the circlip as required, keeping the tool axis aligned with the shaft or bore to maintain control. For internal circlips, insert the tips into the bore and expand the ring carefully; for external circlips, compress the ring evenly and guide it into or out of the groove. After use, wipe the pliers clean and store in a dry place to protect the oil-hardened steel.

Usage recommendations

Use the pliers only for circlips within the specified 8–140 mm range and avoid applying excessive torque or using the tool as a general-purpose lever. Regularly inspect the tips for wear or damage and replace the tool if tips become deformed to ensure safe and reliable operation.