The Split Pin Locking Safety provided by Wanluo Factory, commonly known as an opening pin or safety pin, is a fundamental and crucial safety anti-loosening component in the operation system of industrial equipment. It mainly features mechanical structure limit locking and anti-detachment protection. Unlike the fixed principles of rigid positioning components such as cylindrical pins, it adopts a double-fork split flexible structure. It can be locked and fixed by manually bending and opening without the need for professional tools.
The Split Pin Locking Safety produced by Wanluo manufacturer is mainly used for connecting parts such as shafts, screws, and transmission shafts with holes. During installation, it passes through the preset holes and then is bent apart to form a permanent physical limit, effectively eliminating the problems of axial movement, loosening, and falling off of the accessories.
Core selling point
With its outstanding fatigue resistance and bending performance, this Split Pin Locking Safety can withstand long-term vibrations, mechanical impacts and high-frequency operational tremors of the equipment, maintaining a stable and reliable locking state. The overall structure is simple and the disassembly is flexible. It supports multiple opening and closing operations for reuse, and will not encounter problems such as rigid fasteners getting stuck, slipping, or breaking. With a minimalist structure, it achieves high-strength safety protection and is a standardized safety accessory for preventing loosening and detachment in various dynamic mechanical equipment.
Application scenario
1. Protection of mechanical transmission system
2. Assembly of vehicle engineering chassis
3. Hydraulic and construction machinery matching
4. Maintenance and operation of general industrial equipment 5. Assembly of workholding fixtures and lightweight equipment
Structural Features & Manufacturing Technology
Split Pin Locking Safety adopt integrated high-precision cold heading and wire forming process, consisting of a semicircular loop head and two symmetrical split straight legs. The smooth rounded head ensures flush installation without protruding sharp edges or scratching surrounding parts. The two split legs feature uniform thickness, good ductility and stable bending performance, allowing free opening and clamping without brittle fracture during assembly. All dimensions are strictly produced in accordance with international standards, ensuring precise matching with standard pin holes and shaft holes. The product is made of high-quality low-carbon steel, stainless steel and copper materials, with fine surface finishing to remove burrs and sharp corners. After galvanizing or passivation anti-corrosion treatment, the pin surface is smooth and rust-proof, maintaining stable mechanical flexibility and locking performance in long-term dynamic working environments.
Moisture-proof inner bag + export carton, standard bulk packaging, pallet packing for large orders
Supply Service
In-stock standard sizes, non-standard customization, one-stop fastener supporting supply
Nominal Diameter
d①
0.6
0.8
1
1.2
1.6
2
2.5
3.2
d
max
0.5
0.7
0.9
1
1.4
1.8
2.3
2.9
min
0.4
0.6
0.8
0.9
1.3
1.7
2.1
2.7
α
max
1.6
1.6
1.6
2.5
2.5
2.5
2.5
3.2
min
0.8
0.8
0.8
1.25
1.25
1.25
1.25
1.6
b
≈
2
2.4
3
3
3.2
4
5
6.4
c
max
1
1.4
1.8
2
2.8
3.6
4.6
5.8
min
0.9
1.2
1.6
1.7
2.4
3.2
4
5.1
L
Range of Length
4-12
5-16
6-20
8-25
8-32
10-40
12-50
14-63
Nominal Diameter
d①
4
5
6.3
8
10
13
16
20
d
max
3.7
4.6
5.9
7.5
9.5
12.4
15.4
19.3
min
3.5
4.4
5.7
7.3
9.3
12.1
15.1
19
α
max
4
4
4
4
6.30
6.30
6.30
6.30
min
2
2
2
2
3.15
3.15
3.15
3.15
b
≈
8
10
12.6
16
20
26
32
40
c
max
7.4
9.2
11.8
15.0
19.0
24.8
30.8
38.5
min
6.5
8.0
10.3
13.1
16.6
21.7
27.0
33.8
L
Range of Length
18-80
22-100
32-125
40-160
45-200
71-250
112-280
160-280
Core Advantages & Industrial Applications
1. Unique flexible split leg locking design realizes pure physical limit anti-loosening. Different from thread anti-loosening methods, it completely avoids loosening failure caused by vibration and torque attenuation, greatly improving equipment operation safety.
2. Excellent bending ductility and fatigue resistance. The Split Pin Locking Safety’s pin body can be bent and opened repeatedly during installation and maintenance without cracking or deformation, supporting convenient disassembly and repeated locking for equipment inspection and part replacement.
3. Ultra-high installation compatibility, suitable for all standard clevis pins, shaft holes and bolt pin holes. The lightweight and compact structure will not affect the assembly precision and mechanical movement of equipment, with zero interference to dynamic components.
4. Diversified material options adapt to multiple working environments. Galvanized carbon steel split pins are cost-effective for conventional machinery; stainless steel split pins feature excellent rust and corrosion resistance for outdoor, marine and humid environments.
5. Extremely wide industrial applicability, widely used in automobile chassis, agricultural machinery, engineering equipment, hydraulic components, railway facilities, mechanical transmission structures and all dynamic assembly scenarios requiring anti-loosening safety protection.
After-Sales Service Guarantee
We implement unified global after-sales service policy for all sold products:
✅ Quality Problem Full Compensation : Free replacement or full refund for products with production quality defects
✅Technical After-Sales Support : 24/7 online engineering technical guidance for product installation, matching and scene selection
✅ Order Problem Handling : Solve cargo damage, shipment shortage and logistics abnormal problems for overseas customers
✅ Long-Term After-Sales Tracking : Follow up product use feedback for long-term bulk cooperative customers
Note: Damage caused by man-made improper operation and overloaded use is not within the after-sales warranty scope
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