Knipex 4421J41 Internal Retaining Ring Pliers Bent Nose

Product Description

The KNIPEX 4421J41 is a bent-nose internal retaining ring pliers designed for installing and removing internal snap rings in bores and housings. Built to DIN 5256 D standards, this tool features a 90-degree tip angle and a 3.20 mm tip diameter, making it well-suited for reaching into deep or obstructed bores where straight-nose tools cannot reach. The forged steel body is oil-hardened for durability under repeated load, and the plastic handles provide a non-slip grip during use. At 12.5 inches overall length, it offers the reach and leverage needed for medium to large bore applications. Licensed tradespeople and industrial mechanics rely on this style of plier for drivetrain, bearing, and housing assemblies.

This tool is used in applications requiring internal retaining ring service on shafts, gearboxes, hydraulic cylinders, motors, pumps, and similar assemblies. The 90-degree bent nose is the appropriate choice when axial access to a bore is blocked or when the ring groove is recessed well inside a housing. It is commonly found in automotive, HVAC, industrial maintenance, and heavy equipment repair environments. The solid-style forged construction is suited for both light production work and field service use.

Key Features

• 90-degree bent tip angle for accessing recessed or obstructed internal ring grooves
• Tip diameter of 3.20 mm (0.1260 inches) for positive engagement with ring holes
• Forged steel body, oil-hardened for long service life under repeated stress
• Non-slip plastic handles for secure grip during installation and removal
• Meets DIN 5256 D standard for retaining ring pliers
• Solid-style construction — no interchangeable tips to lose or misplace in the field

Compatibility

Designed for use with internal retaining rings in bores and housings where a bent-nose approach is required. Consult ring and bore sizing charts to confirm tip diameter and nose geometry match the specific ring being serviced.

Installation Notes

Internal retaining ring pliers should be used by qualified mechanics or tradespeople familiar with snap ring hazards. Always wear eye protection — retaining rings can release under tension and become a projectile. Confirm tip diameter matches the ring holes before applying force, as mismatched tips can slip and damage the ring or bore. Keep tips clean and inspect for wear before each use.