CAT 1W-7020 47.15mm Outer Diameter Retainer Ring

CAT 1W-7020 is a Caterpillar outer diameter elastic retaining ring (bore retaining ring) used for axial positioning of bearings, gears, and other components. It fits a 47.15mm outer diameter mounting groove and is commonly found in precision transmission parts such as hydraulic pumps and gearboxes in mini excavators and loaders. Its core function is to prevent axial movement of bearings, gears, and other parts. The following is the structured core information:

Core Parameters
Item Details
Basic Attributes
Model 1W-7020, Bore Retaining Ring (Outer Diameter Retaining Ring), Cut-out Design, Installed in the bearing housing bore groove, Fits a 47.15mm (1.856in) outer diameter groove, Used for axial positioning and anti-dislodgement, Suitable for low-to-medium speed rotation conditions (≤3000rpm)

Compatible Models
CAT 305/306/307 Mini Excavators, 906/907 Loaders, Fits positioning grooves for hydraulic pump output shaft bearings, gearbox second shaft gears, drive axle half shaft bearings, etc.

Material and Process
65Mn Spring steel base material, quenched and tempered, hardness HRC 48-52, galvanized and passivated surface for corrosion protection, uniform thickness, excellent elasticity and toughness, dimensional tolerances conform to GB/T 893.1 standard.

Key Dimensions: Outer diameter 47.15mm (1.856in), free diameter 45.80mm, thickness 1.5mm, notch width 2.0mm, fitting groove diameter 47.15mm, groove width 1.6mm, weight approx. 0.012kg

Functional Parameters: Axial load ≤5kN, operating temperature -40℃ to +120℃, elastic deformation ≤0.5mm, radial tension force after installation ≥200N, suitable for bearing outer ring or gear end face positioning.

Matching Components: Fits bearing outer diameter 47.15mm, bearing seat hole groove diameter 47.15mm, matching installation tool (circlip pliers), compatible with seal ring 4T-0522, bearing… 608-7313 and other compatible components

Installation and Maintenance Points

Preparation before installation: Clean the bearing housing hole groove, removing burrs, oil, and rust; check that the groove diameter tolerance is H7 and the width tolerance is +0.1mm to ensure the retaining ring can be smoothly inserted and reliably tightened; use dedicated internal retaining ring pliers to avoid deformation or breakage of the retaining ring caused by ordinary tools.

Installation steps: Clamp the two ends of the retaining ring cut with internal retaining ring pliers, compress the retaining ring to reduce its outer diameter, and smoothly place it into the groove; release the retaining ring pliers to allow the retaining ring to naturally tighten and fit against the inner wall of the groove; check that the end face of the retaining ring fits tightly against the outer ring of the bearing, without looseness or misalignment, and the axial clearance is ≤0.1mm.

Maintenance and replacement: Check the elasticity and wear of the retaining ring every 2000 hours. Replace it when deformation, breakage, or severe surface corrosion occurs; avoid overload impacts that may cause the retaining ring to fall off. Do not strike during installation to prevent damage to the retaining ring and groove.