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High hardness 20CrMo forged SB121 middle cylinder for Soosan SB121 excavator rock breaker, OEM replacement center cylinder with, wholesale price available.
Core Product Features
Integral die forging blank forming, compact internal metal grain, no internal shrinkage cavity or sand hole, anti-deformation under long period alternating pressure.
All internal oil passage CNC one-step drilling, smooth inner channel without burr, stable hydraulic oil circulation to avoid pressure loss.
All through bolt installation hole, valve mounting hole precise tapping, consistent OEM hole spacing, direct assembly without field reaming.
Stress relief tempering after finish machining, eliminate processing internal stress, effectively prevent cylinder body crack under cold-hot alternating construction environment.
Black anti-rust finish on outer surface, anti-corrosion for muddy, damp open-air mine working condition.
Independent solid wooden case packaging, avoid collision deformation during long-distance sea & land transportation.
Advanced Production Technology
20CrMo alloy steel bar incoming spectrum inspection, chemical composition & mechanical performance test to reject inferior recycled steel.
High-temperature integral die forging, multiple forging compaction to optimize internal metal structure.
Rough machining outer outline + pre-drill all oil passage and mounting holes.
Fine boring inner cylinder bore to guarantee precision tolerance matching with piston.
Inner wall high-frequency surface quenching + low temperature tempering to lock hardness and remove quenching stress.
Full finish tapping for all thread holes, strict OEM dimension calibration.
Full dimensional inspection + hydraulic pressure leakage test before finished storage.
Product Application
Core overhaul replacement spare for SB121 breaker when original cylinder inner bore scratch crack, oil channel blockage, body crack happen.
Regular heavy maintenance spare for 20~30t excavator equipped SB121 hammer in quarry mining, rock excavation, road demolition, municipal foundation construction.
Bulk stocking core spare parts for global construction machinery spare parts wholesaler and local professional breaker repair factory.
Adapt to heavy-load continuous working in granite mine, reinforced concrete breaking, frozen soil excavation harsh working scenarios.
FAQ
Q1: Which hydraulic breaker fits this SB121 middle cylinder?
A1: Specially for Soosan SB121, SB121TS, SB121TR hydraulic breaker for 20~30 ton excavator.
Q2: What material is your SB121 cylinder made of?
A2: Integral forged 20CrMo chrome molybdenum alloy steel with inner wall surface quenching treatment.
Q3: Why original cylinder easily crack in mining work?
A3: Inferior cast iron blank without standard heat treatment, poor toughness against frequent impact load.
Q4: Can I buy one piece sample before bulk purchase?
A4: Sample purchase is available, big bulk order enjoys preferential price and priority delivery.
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...
