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SM40/TB20
TANK/SLYM
China
1PC
L/C, T/T
standard export packaging
3-5 working days
12 months
avalible
0.7-1.3t
Precision Metallurgy for 0.7–1.3 Ton Micro Diggers
The SLYM SM40/TB20 mini rock hammer is built to deliver maximum breakout force without overloading ultra-mini carriers. Backed by over 10 years of precision manufacturing expertise, SLYM Machinery implements rigorous metallurgical standards across every component:
⚙️ Key Technical Features & Manufacturing Protocols
1. Micro-Flow Hydraulic Circuit Optimization
Micro excavators in the 0.7–1.3T class utilize low-capacity hydraulic reservoirs. The SM40/TB20 valve spool is micro-honed (Ra ≤ 0.1μm) within 0.005 mm tolerances. This precision prevents internal oil bypass and allows rapid spool actuation under auxiliary flows as low as 18 L/min, preventing hydraulic pump cavitation.
2. The SLYM Metallurgical Advantage
Piston Armor: Forged from 20CrNiMo alloy steel and subjected to -196℃ sub-zero cryogenic treatment, converting residual austenite into stable martensite to guarantee zero thermal expansion inside the cylinder bore.
Post-Cured Sealing System: High-density polyurethane seal kits and accumulator diaphragms undergo secondary oven baking, ensuring zero gas leakage and fluid isolation at temperatures up to 120°C under 800–1230 BPM high-frequency operation.
️ Primary Application Scenarios
Residential & Backyard Demolition: Compact 70 kg footprint easily maneuvers through standard doorway openings and narrow garden gates.
Indoor Concrete & Slab Removal: Low-decibel box-silenced casing meets residential and indoor noise limits.
Utility Pipe & Cable Trenching: Penetrates hard-packed clay, asphalt, and reinforced concrete footings.
