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| Quantity: | |
|---|---|
all model
SLYM
China
10PC
T/T, L/C, Western Union
standard exporting package
3-5days
available
Shear Stress Resistance vs. Axial Tension
Unlike internal through bolts that endure axial stretching forces, side plate bolts operate under intense shear stress (cutting forces) and bending moments. Every time an excavator tilts or applies angular leverage to a rock, the lateral recoil force attempts to shear the bracket bolts at the interface between the housing plate and the breaker cylinder.
[Housing Side Plate] <--| Force (Shear Vector)
|=== [Side Plate Bolt Shear Zone]
[Power Cell Body] <--| Force (Opposing Shock Vector)
If bracket bolts loosen or suffer from poor material toughness, lateral motion cuts the bolt shank clean across the housing seam or distorts the bracket bolt holes into oval shapes.
Metallurgy & Engineering Differentiators
1. Optimal Hardness-Toughness Balance: Heat-treated via Quenching & Tempering (Q&T) to HRC 33–38. Over-hardening bolts makes them brittle under shear impact; SLYM maintains high impact toughness (≥45 J) to absorb lateral shock without snapping.
2. Precision Machined Threads: Precision CNC thread execution ensures uniform thread engagement with heavy-duty lock nuts, preventing thread stripping under high-frequency housing vibration.
3. Manganese Phosphate Coating: Provides corrosion protection and surface oil retention to ensure smooth torque application and prevent thread galling during service.
| Specification Parameter | Standard 40Cr / AISI 5140 | Heavy-Duty 42CrMo / AISI 4140 |
| Recommended Application | Standard side/top brackets (10 ~ 20 Ton) | Mining & heavy quarry brackets (>25 Ton) |
| Tensile Strength (R_m) | ≥ 980 MPa | ≥ 1100 MPa |
| Yield Strength (R_eL) | ≥ 785 MPa | ≥ 930 MPa |
| Hardness Range | HRC 32 ~ 36 | HRC 35 ~ 39 |
| Shear Fastening Support | High-strength lock nut + washer | Nord-Lock® double-wedge washers |
