Figure-Eight Oil Grooves

The steel bushing is primarily made of materials such as 45#, 40Cr, 20CrMo, 20CrMnTi, 16Mn, and GCr15. The inner surface is machined with various oil groove patterns. After heat treatment, the surface hardness and wear resistance are enhanced, making it suitable for heavy-duty joint applications in construction machinery such as excavators, rotary drilling rigs, large loaders, and diaphragm wall grabbers. From raw materials to finished products, every process step is strictly controlled to ensure product quality, producing bushings with high wear resistance, high surface hardness, and strong internal toughness.

The figure-eight oil groove design forms a continuous lubricating film, providing wear resistance and resistance to misalignment.

High-load-capacity alloy material, suited for heavy-duty working conditions - Precision tolerances for a snug fit, reducing noise.

Excellent self-lubricating performance, reducing maintenance costs.

SN-H Steel Bushing

The inner surface of the SN-H steel bushing is machined with various oil groove patterns. After heat treatment, its surface hardness and wear resistance are enhanced, making it suitable for heavy-duty joint applications in construction machinery such as excavators, rotary drilling rigs, large loaders, and diaphragm wall grabbers.

Our company's steel bushing bearings use 45#, 40Cr, 20CrMo, GCr15, and other materials as the base. From raw materials to finished products, every process step is strictly controlled to ensure product quality, producing bushings with high wear resistance, high surface hardness, and strong internal toughness.

SN-H-1

Through-Hardened Steel Bushing

Material: GCr15 bearing steel

Surface: None

Process: Through hardening, hardness 58~62 HRC.

SN-H-2

Carburized and Hardened Steel Bushing

Material: Low-carbon or low-carbon alloy steels such as 20CrMnTi, 20CrMo

Surface: Phosphated, inner surface coated with molybdenum disulfide

Process: Surface carburizing and hardening
　　　Surface hardness 58~62 HRC
　　　Carburized layer depth 0.8~1.2 mm.

SN-H-3

Induction-Hardened Steel Bushing

Material: 45, 40Cr

Surface: Phosphated, inner surface coated with molybdenum disulfide

Process: Quenched and tempered, hardness 201~275 HB
　　　Inner surface induction hardening
　　　Surface hardness 52~60 HRC
　　　Effective hardened layer depth 1.0~2.0 mm.

Available Materials

42CrMo - Ultra-high-strength steel
40Cr - Medium-carbon quenched and tempered steel
20CrMo/20CrMnTi - Low-carbon alloy steel
GCr15 - Bearing steel
45# - Carbon steel
Customizable material options are available to meet your diverse product requirements.