Knipex 49 31 A0 External Retaining Ring Pliers

Product Description

The KNIPEX 49 31 A0 is a straight-head external retaining ring pliers designed for installing and removing external snap rings with a ring diameter range of 1/8 to 25/64 inches. Built with a steel body and non-slip plastic-coated handles, this tool delivers controlled grip during repetitive fastener work. The 0.90 mm tip diameter and 0 degree tip angle make it well-suited for straight-on access in tight assemblies. A built-in limiter feature prevents over-expansion of rings, reducing the risk of ring distortion or tip slippage. Overall tool length is 140 mm (approximately 5.5 inches). Licensed technicians and mechanics working on motors, pumps, shafts, and rotating assemblies will find this pliers a dependable single-purpose tool.

The 49 31 A0 is used in applications where external retaining rings must be seated or removed from shafts, bores, or housings in HVAC equipment, pump assemblies, motors, and general mechanical systems. The straight head style provides direct tip engagement when working with components that have adequate clearance around the snap ring groove. It is appropriate for residential and light commercial service work where small-diameter external rings in the 1/8 to 25/64 inch range are common.

Key Features

• External ring pliers designed for snap rings in the 1/8 to 25/64 inch diameter range
• Straight head style with 0 degree tip angle for direct access to ring grooves
• 0.90 mm tip diameter (0.0313 inch) for precise engagement with small snap ring holes
• Built-in limiter prevents over-expansion and protects ring integrity
• Steel body construction with non-slip plastic-coated handles
• Integrated spring for automatic tip return between uses
• Conforms to DIN 5254 A standard

Compatibility

Designed for external retaining rings in the 1/8 to 25/64 inch diameter range. Suitable for use with DIN 5254 A compliant external snap rings on shafts and rotating components in mechanical assemblies.

Installation Notes

This tool is used by HVAC technicians, plumbers, electricians, and general mechanics during motor, pump, and shaft service. Always relieve system pressure and de-energize equipment before disassembling components that use retaining rings. Use eye protection when compressing or expanding snap rings, as rings under tension can release unexpectedly. Inspect ring grooves for wear or damage before reseating a ring.