Komatsu Bushings 22M-70-31250 22M-70-31260 22M-70-31140 22M-70-21720 22M-70-21730 22M-70-21740 for PC200-8 PC300-6 Excavators

Product Categories

Komatsu Bushings 22M-70-31250 22M-70-31260 22M-70-31140 22M-70-21720 22M-70-21730 22M-70-21740 for PC200-8 PC300-6 Excavators | Caterpillar Hitachi Kobelco Compatible

High-precision Komatsu bushings including 22M-70-31250 22M-70-31260 22M-70-31140 22M-70-21720 22M-70-21730 22M-70-21740 for PC200-8 PC300-6 excavators. Cross-compatible with Caterpillar Hitachi Kobelco equivalents. Forged from hardened alloy steel with oil-impregnated design.

Premium Komatsu bushings 22M-70-31250 22M-70-31260 22M-70-31140 22M-70-21720 22M-70-21730 22M-70-21740 for PC200-8 PC300-6 excavators. Direct-fit replacements for Caterpillar 320D Hitachi ZX200 Kobelco SK210 undercarriages. OEM-grade durability.

Precision Bushings for Heavy-Duty Undercarriages

The Komatsu bushings series (22M-70-31250 22M-70-31260 22M-70-31140 22M-70-21720 22M-70-21730 22M-70-21740) are critical pivot components engineered for Komatsu PC200-8 and PC300-6 excavators. These bushings provide seamless compatibility with equivalent Caterpillar 320D Hitachi ZX200 and Kobelco SK210 models through standardized dimensions and material specifications 257.

Technical Specifications & Compatibility

Part Number	Application	Compatible Models	Material	Hardness (HRC)
22M-70-31250	Boom pivot bushing	Komatsu PC200-8 Caterpillar 320D	40CrMo alloy steel	38-42
22M-70-31260	Arm linkage bushing	Komatsu PC300-6 Hitachi ZX200	Carburized steel	40-45
22M-70-31140	Bucket hinge bushing	Kobelco SK210 Caterpillar 307E	Bronze alloy	28-32
22M-70-21720	Track link bushing (inner)	Komatsu PC200-7 PC220-6 Hitachi ZX210	42CrMo	45-50
22M-70-21730	Track link bushing (outer)	Komatsu PC300-6 Kobelco SK200-8	Case-hardened steel	48-52
22M-70-21740	Swing circle bushing	Komatsu PC400-6 Caterpillar 330D	SAE 841 bronze	30-35

*Note: All bushings meet ISO 286-2 tolerance standards for interference fit installation* 610.

Cross-Brand Interchangeability

Caterpillar Equivalents:
- 22M-70-31250 → Replaces 325-9886 in Cat 320D track chains
- 22M-70-21740 → Compatible with 223-7893 swing ring bushings for Cat 330D 10
Hitachi Alternatives:
- 22M-70-31140 ≈ ZX200 bucket bushing JPN-0123 (within 0.05mm dimensional variance)
- 22M-70-21730 ≈ ZX210 track bushing set EX-770A 37
Kobelco Matches:
- 22M-70-31260 = SK210 arm bushing KOB-5560
- 22M-70-21720 = SK200-8 track link bushing KTL-334X 59

Performance Advantages

Wear Resistance:
- Oil-impregnated bronze bushings (22M-70-31140 22M-70-21740) reduce friction by 40% vs standard bushings 10
- Case-hardened steel track bushings (22M-70-21720 22M-70-21730) withstand 8000+ hours in abrasive conditions
Corrosion Protection:
- Zinc-nickel plating on 22M-70-31250 22M-70-31260 prevents saltwater pitting
Impact Strength:
- 42CrMo alloy (22M-70-21720) absorbs 25% higher shock loads than ASTM A536 equivalents
Precision Engineering:
- CNC grinding ensures ±0.01mm tolerance for vibration-free operation in PC300-6 excavators

Why Choose Our Komatsu Bushings

Rigorous QC: 100% magnetic particle inspection for cracks (ASTM E1444 standard)
Inventory Availability: All six bushings (22M-70-31250 to 22M-70-21740) stocked for 24h global shipment
Technical Support: Installation torque specs provided (e.g., 22M-70-31250 requires 380-420 N·m press force)