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Whole piece hot forging blank forming, compact internal metal grain, no loose pore inside, avoid expansion jamming under long heavy load.
Multi-level quenching & tempering treatment: outer surface wear-resistant hardening, inner core retains strong toughness, not easy bending or break under frequent impact.
CNC precision milling flat side & end face, tolerance controlled within ±0.02mm, tight fit with front head pin hole, no clearance shaking after installation.
Anti-rust black oxide surface treatment, anti-rust & anti-corrosion in humid mine, rainy open-air construction environment.
Optimized chamfer design on two ends, convenient quick assembly & disassembly during on-site overhaul maintenance.
Distinguish from low-cost steel-cut flat pin, our forged craft effectively prevent early deformation and rapid abrasion.
Direct replacement spare part for worn/bent original flat pin during SB121 hydraulic breaker routine overhaul.
Fix typical failure: chisel shaking & abnormal banging noise, fast abrasion of front bushing.
Regular standby spare for 28~35t excavator fleet with SB121 hammer in quarry mining, road demolition, municipal foundation breaking.
Bulk stocking consumable for global breaker spare parts wholesaler & local machinery repair workshop.
Suitable for granite mining, concrete dismantling, frozen soil crushing, roadbed construction heavy-duty scenarios.
Product Competitive Advantages
Forged 42CrMo material service life 2.2~3 times longer than ordinary 45# steel cutting flat pin, reduce frequent replacement cost for end user.
OEM identical dimensional precision, plug-and-play without on-site grinding modification.
Strict factory sampling shear test, ultra-low early bend failure rate after installation.
Factory direct sale without middleman markup, improve distributor profit margin.
Constant spot inventory, 1pc sample available, bulk purchase enjoys tiered discount & 1~7 working days fast delivery.
6-month quality warranty for manufacturing defect, free replacement for qualified claim.
FAQ
Q1: What material is your SB121 flat pin made of?
A1: Premium forged 42CrMo chrome molybdenum alloy steel with full heat treatment.
Q2: Why original flat pin bend easily in construction?
A2: Low carbon steel raw material, no formal heat treatment or long-time overload striking operation.
Q3: Can I buy single piece sample before bulk order?
A3: Sample order is acceptable, large quantity gets preferential price & priority shipment.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2008
Total Annual:
20000000-25000000
Employee Number:
90~100
Ecer Certification：
Verified Supplier
Guangzhou Liantuo Machinery Trading Company is a professional cross-border supplier specializing in full-series excavator and construction machinery spare parts. We cover a complete product range, including hydraulic parts, undercarriage components, engine core parts, electrical control parts, sle...
Guangzhou Liantuo Machinery Trading Company is a professional cross-border supplier specializing in full-series excavator and construction machinery spare parts. We cover a complete product range, including hydraulic parts, undercarriage components, engine core parts, electrical control parts, sle...
