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+86-17692703999
+86-17692703999 No. 6, West Side Auxiliary Road,
Sunshine Street, Linxi County, Xingtai
City, Hebei Province
Sunshine Street, Linxi County, Xingtai
City, Hebei Province
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21K-70-12161
The 21K-70-12161 excavator bushing is a high-performance OEM replacement component engineered exclusively for KOMATSU PC200 and KOMATSU PC220 excavators, serving as a critical part of heavy machinery bushing systems. It directly replaces original parts with OEM codes 21K-70-12161 and 21K7012161, addressing core operational challenges of excavators—reducing component wear, buffering vibration, and protecting high-value key parts. Crafted from premium alloy steels (45#/40Cr/42CrMo), this OEM excavator bushing ensures seamless compatibility with KOMATSU’s 20-ton class models, eliminating installation modifications and quickly restoring equipment performance. Whether used in construction, mining, or infrastructure projects, it delivers consistent durability that meets the demands of heavy-duty operations.
Made from 42CrMo steel and 40Cr steel, the 21K-70-12161 excavator bushing undergoes precision heat treatment (quenching and tempering) to achieve a surface hardness of HRC 55-6This process converts direct friction between excavator pins and joints into friction between the bushing and components, reducing wear rates by up to 30% compared to standard steel bushings. It effectively extends the service life of related parts (e.g., pins, boom joints) and cuts maintenance frequency.
Excavators like the KOMATSU PC200/PC220 often face rough conditions—such as digging hard soil or breaking rocks—with frequent vibration and impact. The heavy machinery bushing leverages the inherent elasticity of its alloy structure to absorb and dissipate destructive energies, reducing impact on adjacent components (e.g., hydraulic cylinders, frame connections). This prevents issues like loose fasteners and fatigue cracks, boosting equipment stability and operational safety.
As a replaceable "sacrificial" part, the 21K-70-12161 excavator bushing bears most operational friction and impact, shielding expensive key components (e.g., excavator pins, bucket joints) from damage. When wear occurs (typically after 1,500-2,000 hours of use), only the bushing needs replacement—avoiding the high cost of repairing or replacing entire core parts.
Every KOMATSU PC200 bushing undergoes CNC precision machining, with radial runout errors controlled within 0.02mm. This ensures a perfect fit with the original mounting positions of KOMATSU PC200 and PC220 excavators, eliminating installation gaps that cause abnormal noise or accelerated wear. No additional modifications are required, saving maintenance time and enabling quick equipment return to service.
In earth-moving tasks (e.g., foundation digging, trench backfilling) with KOMATSU PC200/PC220 excavators, the 21K-70-12161 bushing resists wear from sand, soil, and small gravel. Its wear-resistant surface prevents sediment intrusion into hinges, maintaining smooth bucket rotation and boom movement—critical for meeting tight construction schedules.
For light mining tasks (e.g., coal or limestone extraction), the bushing’s high impact resistance handles occasional collisions with ore blocks. Its 42CrMo steel construction withstands repeated loading/unloading stress, ensuring stable performance during 8-12 hour continuous operation shifts.
In road and bridge projects (e.g., roadbed excavation, concrete placement), the KOMATSU PC220 bushing performs reliably in variable weather—from high humidity to dust. Its corrosion-resistant surface treatment (phosphating or chrome plating) prevents rust, ensuring consistent performance in long-term outdoor use.
When handling mixed construction waste (e.g., concrete chunks, steel scraps), the bushing’s buffering capacity reduces impact from irregular materials. This protects the excavator’s bucket and arm joints, minimizing unplanned downtime for repairs.
The 21K-70-12161 excavator bushing is a high-performance OEM replacement component engineered exclusively for KOMATSU PC200 and KOMATSU PC220 excavators, serving as a critical part of heavy machinery bushing systems. It directly replaces original parts with OEM codes 21K-70-12161 and 21K7012161, addressing core operational challenges of excavators—reducing component wear, buffering vibration, and protecting high-value key parts. Crafted from premium alloy steels (45#/40Cr/42CrMo), this OEM excavator bushing ensures seamless compatibility with KOMATSU’s 20-ton class models, eliminating installation modifications and quickly restoring equipment performance. Whether used in construction, mining, or infrastructure projects, it delivers consistent durability that meets the demands of heavy-duty operations.
Made from 42CrMo steel and 40Cr steel, the 21K-70-12161 excavator bushing undergoes precision heat treatment (quenching and tempering) to achieve a surface hardness of HRC 55-6This process converts direct friction between excavator pins and joints into friction between the bushing and components, reducing wear rates by up to 30% compared to standard steel bushings. It effectively extends the service life of related parts (e.g., pins, boom joints) and cuts maintenance frequency.
Excavators like the KOMATSU PC200/PC220 often face rough conditions—such as digging hard soil or breaking rocks—with frequent vibration and impact. The heavy machinery bushing leverages the inherent elasticity of its alloy structure to absorb and dissipate destructive energies, reducing impact on adjacent components (e.g., hydraulic cylinders, frame connections). This prevents issues like loose fasteners and fatigue cracks, boosting equipment stability and operational safety.
As a replaceable "sacrificial" part, the 21K-70-12161 excavator bushing bears most operational friction and impact, shielding expensive key components (e.g., excavator pins, bucket joints) from damage. When wear occurs (typically after 1,500-2,000 hours of use), only the bushing needs replacement—avoiding the high cost of repairing or replacing entire core parts.
Every KOMATSU PC200 bushing undergoes CNC precision machining, with radial runout errors controlled within 0.02mm. This ensures a perfect fit with the original mounting positions of KOMATSU PC200 and PC220 excavators, eliminating installation gaps that cause abnormal noise or accelerated wear. No additional modifications are required, saving maintenance time and enabling quick equipment return to service.
In earth-moving tasks (e.g., foundation digging, trench backfilling) with KOMATSU PC200/PC220 excavators, the 21K-70-12161 bushing resists wear from sand, soil, and small gravel. Its wear-resistant surface prevents sediment intrusion into hinges, maintaining smooth bucket rotation and boom movement—critical for meeting tight construction schedules.
For light mining tasks (e.g., coal or limestone extraction), the bushing’s high impact resistance handles occasional collisions with ore blocks. Its 42CrMo steel construction withstands repeated loading/unloading stress, ensuring stable performance during 8-12 hour continuous operation shifts.
In road and bridge projects (e.g., roadbed excavation, concrete placement), the KOMATSU PC220 bushing performs reliably in variable weather—from high humidity to dust. Its corrosion-resistant surface treatment (phosphating or chrome plating) prevents rust, ensuring consistent performance in long-term outdoor use.
When handling mixed construction waste (e.g., concrete chunks, steel scraps), the bushing’s buffering capacity reduces impact from irregular materials. This protects the excavator’s bucket and arm joints, minimizing unplanned downtime for repairs.
