Double Acting Quick Release Ball Lock Pins
PDM
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Features of Ball Lock Quick Release Pins
PDM Industry's double ring quick release ball lock pin belongs to the self-locking ball lock pins family, built for secure, tool-free component positioning and repeated disassembly. Designed with dual pull rings and an internal spring ball locking mechanism, this pin retracts the locking balls from either end of the shaft, enabling flexible insertion and extraction even when one side of the workpiece is blocked. Once fully inserted, spring-loaded steel balls extend outward to form a positive mechanical lock, eliminating the risk of accidental separation. This fastener is widely used for modular frames, jigs, inspection fixtures and movable machine components that require frequent assembly changeovers.
Aerospace-grade self-locking single acting ball lock pins, a type of quick release pins. Tool-free, press-button ball release. We also stock ball lock pins with plastic grip within our ball lock pins & fasteners range.
Quick Release Ball Lock Pin Title:
Factory Direct Quick Release Ball Lock Pins grip length 5mm up to 150mm Custom Competitive Price Ball Lock Pins
ISO 9001 Certified Quick Release Ball Lock Pins Stainless Steel 304 201 316 630 DIN Standard Ball Lock Pins
High Precision Quick Release Ball Lock Pins B handle L Handle T handle D ring handle quick release ball lock pin
CNC Turning Machined Button Handle Ball Lock Pins Plain Zinc Plated Quick Release Ball Lock Pins for Gym
These quick-release spring loaded ball lock pins are designed for industrial fastening, positioning, and alignment tasks where secure holding and rapid disassembly are required. The positive locking mechanism keeps the pin engaged until the actuator button or knob is deliberately pressed or turned, allowing the internal balls to retract into the shank—preventing accidental release during operation. Available materials include 17-4 stainless steel for high-strength and fatigue-resistant applications, 300 series stainless steel for superior corrosion resistance, and 4130 alloy steel for high-toughness and wear-resistant needs. A wide selection of diameters and lengths accommodates everything from precision alignment to structural positioning. Handle styles include L-type, T-type, ring, dome, marine-grade, and button configurations to suit various installation spaces and operating preferences. Typical applications range from tooling fixtures and mold change systems to marine deck equipment and modular assembly structures—delivering dependable holding power with simple, one-handed release operation.
| Metric - B Handle Quick Release Ball Lock Pin |
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| NominalDia. | d1 | d2 | I2 | I3 | d4 | I4 | d3 | D | |
| Min. | Max. | ±13 | +.000/-.76 | ||||||
| 5 | 4.92 | 4.96 | 5.54 | 6 | 23.4 | 11.9 | 16 | 5.8 | 20.6 |
| 6 | 5.92 | 5.96 | 6.99 | 7 | 23.4 | 11.9 | 16 | 5.8 | 20.6 |
| 8 | 7.92 | 7.96 | 9.42 | 8 | 23.4 | 11.9 | 16 | 5.8 | 20.6 |
| 10 | 9.92 | 9.96 | 11.86 | 9 | 25.7 | 14.2 | 17.8 | 7.4 | 25.4 |
| 12 | 11.92 | 11.96 | 14.45 | 10 | 32.3 | 18.3 | 21.6 | 10.7 | 34.7 |
| 16 | 15.92 | 15.96 | 19 | 14 | 41.9 | 23.9 | 27.9 | 13.7 | 44.5 |
| Inch - B Handle Quick Release Ball Lock Pin |
|
| d1 | d2 | I2 | d3 | d4 | D | I3 | I4 |
| 3/16 | 0.22 | 0.26 | 1/4 | 1/2 | 13/16 | 7/8 | 5/8 |
| 1/4 | 0.289 | 0.39 | 1/4 | 1/2 | 13/16 | 7/8 | 5/8 |
| 5/16 | 0.375 | 0.33 | 1/4 | 1/2 | 13/16 | 29/32 | 5/8 |
| 3/8 | 0.44 | 0.365 | 5/16 | 19/32 | 1-1/8 | 1-3/16 | 13/16 |
| 7/16 | 0.509 | 0.38 | 5/16 | 19/32 | 1-1/8 | 1-3/16 | 13/16 |
| 1/2 | 0.594 | 0.46 | 15/32 | 3/4 | 1-3/8 | 1-13/32 | 1 |
| 9/16 | 0.666 | 0.51 | 15/32 | 3/4 | 1-3/8 | 1-1/2 | 1 |
| 5/8 | 0.75 | 0.58 | 9/16 | 15/16 | 1-3/4 | 1-5/8 | 1-1/16 |
| 3/4 | 0.887 | 0.67 | 5/8 | 15/16 | 1-3/4 | 1-19/32 | 1-1/16 |
| 7/8 | 1.046 | 0.76 | 3/4 | 1-1/4 | 2-1/8 | 2-1/8 | 1-15/32 |
| 1 | 1.209 | 0.89 | 3/4 | 1-1/4 | 2-1/8 | 2-1/8 | 1-15/32 |
Application:
Fitness equipment, mechanical manufacturing, aerospace, mold positioning, equipment component connection, wheelchairs, audio equipment, etc;
Installation steps:
Positioning and Pre installation
A [Align installation hole] -->B [Insert locking pin body]
B -->C [Manually pre tighten fixing bolts]
C -->D [Check the verticality of the locking pin
Working principle
Press the B-type button → drive the internal mechanism to retract the steel ball into the pin body;
Insert/remove the pin body → freely pass through the target positioning hole;
Release button → Steel ball pops out and clicks into the hole wall, completing rigid locking.
