Heavy Duty Slotted Spring Pins ISO 8752 Specifications
| Item | Specification |
|---|---|
| Standard Title | Spring‑type straight pins‑Slotted‑Heavy duty |
| Nominal Diameter d Range | φ1 ~ φ50 |
| Pre‑mounting Diameter d | Max:1.3‑50.9;Min:1.2‑50.5 |
| Chamfer c | Min:0.15‑4;Max:0.35‑4.6 |
| Slot Width h | 0.2‑9.5 |
| Minimum Double Shear Strength | 0.7‑1685 kN (Steel & martensitic stainless steel only) |
| Material Types | Steel (St / Si‑Mn steel), Austenitic SS(A), Martensitic SS(C) |
| Hardness | Steel:420‑560 HVMartensitic SS:440‑560 HVAustenitic SS:cold‑worked |
| Surface Condition | Steel: natural finish, anti‑hydrogen‑embrittlement for plating (ISO 4042)Stainless steel: natural finish |
| Application | Mating hole tolerance H12; slot shall not fully close at minimum hole size |
| Shear Test | ISO 8749 |
| Length Tolerance | L≤10: ±0.25;10＜L≤50: ±0.5;50＜L≤200: ±0.75 |
Heavy-Duty Load & Retention Performance
- High Radial Retention
The heavy-duty construction generates strong radial force after insertion, keeping the pin firmly engaged with the mating hole and resisting axial displacement.
- Stable Performance Under Mechanical Loads
The larger wall section and heavy-duty design provide higher resistance to deformation under shear, impact, and repeated loading compared with lighter-duty spring pin designs.
- Reliable Retention Under Vibration
Continuous radial contact between the pin and hole wall helps maintain retention when the assembly is exposed to vibration, shock, and cyclic mechanical loads.
Slot Design & Radial Expansion
- Controlled Compression During Installation
The longitudinal slot allows the pin diameter to temporarily compress as it enters the hole, reducing insertion resistance while maintaining the required interference fit.
- Radial Expansion After Installation
Once inserted, the spring pin returns toward its original diameter and applies outward radial force against the hole wall, creating continuous contact around the assembly.
- Accommodation of Hole Variation
The elastic expansion of the slotted body allows the pin to compensate for minor variations in the mating hole while maintaining stable positioning and retention.
Dimensional Tolerance & Hole Fit
Controlled Diameter Tolerance
The outside diameter is controlled according to the specified ISO 8752 dimensional requirements, ensuring a predictable interference fit between the pin and mating hole.
Hole-to-Pin Fit
The mating hole diameter should be selected in relation to the pin diameter, material, and required retention force to achieve proper insertion and secure seating after installation.
Insertion Force Control
Correct dimensional matching helps maintain a suitable balance between insertion force and retention. An undersized hole may increase installation force and risk component damage, while excessive clearance can reduce retention.
Hole Geometry & Assembly Alignment
The mating hole should maintain appropriate roundness, straightness, and alignment to allow uniform radial expansion of the slotted body and consistent contact with the hole wall after installation.
Heavy Duty Slotted Spring Pins ISO 8752 Manufacturing Process
Stamping
Heat Treatment
Surface Treatment
Heavy Duty Slotted Spring Pins ISO 8752 Manufacturer
As a professional spring pin and precision metal pin manufacturer, Prota supports standard ISO 8752 production as well as drawing-based orders for industrial customers.
- In-House Production: Stamping, heat treatment, and surface treatment are controlled within the manufacturing process.
- ISO 8752 Production: Manufacturing is carried out according to specified dimensional and performance requirements for heavy-duty slotted spring pins.
- Process Control: Key dimensions, hardness, slot configuration, and surface condition are checked during production.
- Custom Manufacturing: Diameter, length, material, hardness, and surface treatment can be produced according to customer drawings and application requirements.
- B2B Supply Capability: Supports samples, small-batch development, and stable mass production for OEM and industrial applications.
FAQ
What applications are suitable for ISO 8752 heavy duty slotted spring pins?
They are suitable for shafts, gears, levers, hinges, machine components, and other mechanical assemblies requiring a strong, resilient pin connection.
When should I choose a heavy duty slotted spring pin instead of a standard spring pin?
A heavy duty version is generally selected when the assembly is exposed to higher shear loads, shock, vibration, or repeated mechanical loading.
Can ISO 8752 spring pins be used in rotating assemblies?
Yes, they can be used in rotating mechanisms when the pin size, hole fit, and applied loads are properly evaluated for the specific assembly.
Can these pins be installed with standard press-fit equipment?
Yes. Suitable presses or insertion tools can be used, provided the equipment can generate the required installation force without damaging the pin or mating component.
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