CAT 320-7384 BUSHING

CAT 320-7384 is a Caterpillar genuine straight-tube, single-metal, hardened, wear-resistant bushing, suitable for medium-load pivot joints in excavators, loaders, and other equipment. The following are precise original factory specifications and application information, excluding replacement parts (Cat®…).

Core Technical Parameters

Item Details
Part Model: CAT 320-7384 (Straight Cylindrical Monometallic Hardened Bushing)

Product Type: Monometallic wear-resistant bushing, carbon steel base material with hardening treatment, suitable for medium load, oscillating/rotating conditions

Material: 42CrMo alloy steel, integral hardening treatment, surface hardness 58–62 HRC, core hardness 30–35 HRC, uniform wear-resistant layer thickness

Key Dimensions: Inner diameter 65 mm (2.559 in), outer diameter 75 mm (2.953 in), length 70 mm (2.756 in), chamfered ends 1×45°, wall thickness 5 mm

Rated Parameters: Applicable pressure ≤ 20 MPa, operating temperature -30℃ ~ +120℃, linear velocity ≤ 1.0 m/s

Single Weight: Approx. 0.68 kg (1.50 lbs)

Lubrication Adapter: With axial lubrication groove, compatible with lithium-based grease (NLGI) 2) Compatible with centralized lubrication systems

Tolerance Standards: Inner diameter tolerance H8, outer diameter tolerance m7, surface roughness Ra ≤ 0.8 μm

Structure and Core Characteristics

Single-metal hardened structure: 42CrMo alloy steel integrally hardened, high surface hardness ensures wear resistance, core toughness absorbs impact, suitable for oscillating and rotating motions under medium load conditions.

Medium load adaptation optimization: 5 mm wall thickness design can withstand medium radial loads, suitable for non-main load-bearing connecting rods, balance bars, and other pivots, preventing direct wear between pins and structural components.

High-efficiency lubrication design: Axial lubrication grooves ensure uniform grease coverage of the contact surface, reducing friction and wear, and extending the life of bushings and pins.

High-performance, cost-effective universal components: The single-metal structure balances performance and cost, adaptable to medium load joints of various machine models, highly versatile, and easy to maintain.

Compatible Models and Application Scenarios

Compatible Equipment: Cat®® connecting rods, stabilizer bars, bucket pins, and other medium-load pivot joints in CAT 312D2/313D2 excavators, 938K/950GC loaders, etc.

Core Application: Installed between the pivot and structural components, it provides low-friction support, absorbs shocks and vibrations under medium-load conditions, prevents wear on the pivot and structural components, ensures flexible pivot joint operation, and reduces maintenance costs.