Inner Bushing and outer bushing for HB20G/HB30G
Product Description
Certified Alloy Steel: We use high-grade 40Cr or 42CrMo forged alloy steel as raw materials to ensure supreme impact toughness and fatigue resistance.
High-Precision CNC Machining: Every front cover bush and thrust ring is machined under strict dimensional tolerance control, guaranteeing a 100% perfect OEM fitment.
2. Advanced Thermal Processing
Computerized Quenching & Tempering: Our specialized heat treatment process optimizes the grain structure of the steel, significantly increasing its overall wear resistance and core toughness.
Anti-Cracking Structure: This precise thermal processing prevents structural cracking and uneven wear even under extreme pressure, such as heavy-duty bedrock demolition.
3. Full Range of Specifications & Availability
To meet the urgent replacement demands of global fleets, SLYM Machinery maintains a massive inventory of standardized dimensions and mainstream brand models. Whether you need a standard flat bush or a stepped collar bush, we have you covered.
Bushing Dimensions (Inner Diameter * Outer Diameter * Height)
(We support custom sizing according to your drawings or samples)
| Size(mm) | Size(mm) | Size(mm) | Size(mm) |
| 30*50*30 | 65*80*80 | 90*100*100 | 110*135*100 |
| 35*45*45 | 70*80*80 | 100*115*70 | 110*135*120 |
| 40*50*45 | 70*90*90 | 100*115*100 | 120*135*110 |
| 45*60*50 | 71*86*60 | 100*116*90 | 120*140*100 |
| 50*60*60 | 75*90*90 | 100*130*100 | 120*140*120 |
| 55*70*50 | 80*95*70 | 100*130*120 | 125*140*90 |
| 60*75*60 | 80*100*85 | 110*130*120 | 45*55*50 |
Outer Bush Compatible Models & Weight Reference
| No. | Compatible Model | Weight (kg) | Design / Mark |
| 1 | HB10G | 13 | Standard |
| 2 | HB20G | 31/14 | Available WITH COLLAR or WITHOUT COLLAR |
| 3 | HB30G | 44/19 | Available WITH COLLAR or WITHOUT COLLAR |
| 4 | HB40G | 59 | Standard |
| 5 | F22 | 28 | High-Wear Resistant |
| 6 | F35 | 38 | High-Wear Resistant |
| 7 | F45 | 53 | High-Wear Resistant |
| 8 | FS37 | 27 | Standard |
| 9 | DMB140 | 8 | Standard |
| 10 | DMB210 | 16 | Heavy Duty |
| 11 | SB50 | 11.5/8 | Available WITH COLLAR or WITHOUT COLLAR |
| 12 | SB70 | 25/14 | Available WITH COLLAR or WITHOUT COLLAR |
| 13 | SB81 | 25/14 | Available WITH COLLAR or WITHOUT COLLAR |
| 14 | SB121 | 30 | Standard |
4. Specialized Internal Engineering
Optimized Oil Grooves: Precision-milled internal lubrication channels maximize grease retention, lowering heat generation and reducing friction during high-frequency piston temperature cycles.
Lateral Stress Absorption: Specially designed to handle the heavy grinding and side-thrust forces common in mining and trenching.
About SLYM Machinery
As a specialized, professional hydraulic breaker and excavator attachment factory, SLYM Machinery prioritizes manufacturing capacity and quality consistency over everything else. We showcase our engineering strength through every power cell, triangle hammer, and spare part arranged in our production line.
Our parts have been field-tested in complex heavy-duty applications—including challenging subway construction projects—proving their durability where standard components fail. By choosing SLYM, you are backing your business with reliable B2B supply chains, shortened delivery times, and expert technical support.
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