Positive-Lock Couplings
Pin Lock Hydraulic Couplings
Positive locking pins for high-vibration circuits and applications where a sleeve could be accidentally pulled.
Product Overview
Pin lock hydraulic couplings replace the ball/sleeve mechanism with positive locking pins. The design resists accidental disconnection under vibration and shock loads, making it a safety-preferred choice for heavy mobile equipment and high-flow circuits. Sleeve release still allows one-handed operation.
Key Features
- Positive locking under vibration
- No accidental sleeve release
- High-flow variants
- One-handed operation
- Steel or stainless
- Custom threads
Applications
Positive-lock safety design
High-flow variants
Custom threads & materials
24h quote response
Where Pin Lock Earns Its Keep
Any circuit that disconnects itself under vibration is a pin-lock candidate: forestry grapples, mining hammers, demolition tools. If you have ever replaced a coupling after a sleeve was knocked open, pin lock is the upgrade.
Technical Specifications
| Item | Specification |
|---|---|
| Design | Positive pin-lock mechanism |
| Sizes | 1/4" to 1" common |
| Pressure | 200-350 bar class (size and material dependent) |
| Materials | Carbon steel plated; stainless option |
| Locking | Positive pins, sleeve-released |
| Threads | NPT, BSPP, JIC, ORFS |
| Applications | Heavy mobile, high-vibration, high-flow |
| Options | Lockable sleeve, dust caps |
* Specifications subject to change. Contact us for the current datasheet.
FAQ
Questions Buyers Ask
Pin lock vs ball lock - when does it matter?
If a machine vibrates hard or an operator can bump the sleeve (forestry, mining), pin lock prevents accidental disconnect. For general industrial duty, ball lock is cheaper and sufficient.
Interested in Pin Lock Hydraulic Couplings?
Factory-direct pricing, OEM/ODM options and lead times — send your spec and volume, get a quote within 24 hours.