PHD Series GRM4 Pneumatic Workholding Clamp Review: Specs, Price and Applications
The PHD Series GRM4 is a pneumatic workholding clamp for sheet metal and similar objects, including transfer applications. It offers clamp force up to 500 lb in three sizes.
Thirteen jaw styles per size, six modular jaw tips and an adjustable rotation stop for multiple jaw openings, plus mounting, switch and tip options, make it highly configurable.
Quick Verdict
An expanded GRM family with three sizes, giving tooling designers more choice for heavy sheet clamping.
PHD Series GRM4 Pneumatic Workholding Clamp at a Glance
Specification | Details |
Product type | Pneumatic workholding clamp |
Clamp force | Up to 500 lb |
Sizes | Three |
Jaw styles | 13 per size |
Tips | Six modular designs |
Rotation stop | Adjustable |
Options | Mounting, switches, tips |
Price | Request a quote |
Design and Operating Principle
GRM clamps are used on press-line and body-shop tooling to clamp sheet metal edges during transfer. A pneumatic cylinder drives a cam or toggle that closes the jaw, and locking in the closed position means the panel stays clamped if air is lost.
Three sizes let tooling designers match clamp size to flange thickness and space.
Integration and Selection
Select size by force and space, then jaw style and tip. Set rotation stops and add switches.
Standardise tips across tools.
Industry Applications
Industry | Typical use |
Automotive | Body shop clamping |
Appliances | Sheet transfer |
Metal stamping | Press automation |
Heavy equipment | Panel clamping |
Functional Uses
Sheet metal clamping
Transfer tooling
Adjustable opening
Modular tips
Pros and Cons
Advantages
Three sizes
Up to 500 lb
13 jaw styles
Adjustable stop
Limitations
Dimensions not on A3
Pneumatic supply needed
Sheet edges only
Who Should Consider the PHD Series GRM4 Pneumatic Workholding Clamp?
The GRM4 suits sheet metal tooling needing size choice.
Price and Availability
Price: Request a quote. PHD prices the GRM4 by size, options and quantity. Budget for jaw tooling, mounting, air supply, sensors and commissioning as part of the complete installation.
Further Reading
PHD Series GRM4 Pneumatic Workholding Clamp FAQ
What clamp force does GRM4 offer?
Up to 500 lb.
How many sizes?
Three.
How many jaw styles?
13 per size.
How many tips?
Six modular designs.
Can openings be adjusted?
Yes, with an adjustable rotation stop.
How much does it cost?
Request a quote from PHD.
