Bar clamp or one-hand clamp - which one fits the job?
Clamps hold a workpiece steady while glue cures, solder flows or parts are bolted together. This guide compares bar clamps and one-hand clamps by clamping force, throat depth and jaw opening, and shows which design suits which task.
View clampsBar clamp or one-hand clamp - what is the difference?
The classic screw clamp (bar clamp) builds high, finely adjustable force through a threaded spindle and holds it permanently. The one-hand clamp uses a pistol grip, so one hand can guide the workpiece while the other tightens.
For rigid, powerful clamping when bolting or gluing, the screw clamp is the first choice. For quick positioning when bonding, tacking or soldering, where the part still needs adjusting, the one-hand clamp shows its strength.
Clamping force, throat depth and jaw opening - what matters?
Three figures decide whether a clamp fits the task: the clamping force in Newtons, the throat depth (distance from the rail to the pressure axis) and the jaw opening (maximum gap between the jaws). Only their combination counts.
- You need a deep throat when the clamping point sits far from the edge, for example in the middle of a panel.
- Choose jaw opening with reserve so protective pads and packing pieces still fit.
- One-hand clamps usually deliver 100‑500 N, screw clamps several thousand Newtons depending on size.
- Too much force dents soft workpieces - controllable force matters more than the peak value.
Which clamp for gluing, soldering and assembly?
The choice depends on the process. Gluing needs constant pressure over the cure time, soldering needs heat resistance and a clear view of the joint, and assembly needs quick, secure fixing.
- Plastic or felt jaws protect painted and ESD-sensitive surfaces.
- For repetitive assembly, use quick-adjust one-hand clamps that open with a single squeeze.
- For permanent fixing in jigs, use rugged screw clamps in malleable cast iron or steel.
Frequently asked questions
How much clamping force do I need for gluing?
For wood glue-ups, 200‑400 N per clamp spread evenly along the joint is usually enough. Even distribution across several clamps matters more than one high value.
What does throat depth mean on a clamp?
Throat depth is the distance from the guide rail to the pressure axis. It sets how far from the edge of the workpiece you can still apply the clamp.
Are one-hand clamps as strong as screw clamps?
No. One-hand clamps typically deliver 100‑500 N and win on speed and single-hand use. Screw clamps reach far higher, finely dosed forces for permanent clamping.
How do I protect delicate surfaces?
Use clamps with soft plastic or felt jaws, or place a wooden or plastic packing piece underneath. This avoids pressure marks and scratches.
Looking for the right clamp?
We stock screw and one-hand clamps in many sizes - matched by clamping force, throat depth and jaw opening for gluing, soldering and assembly.
Defined force
Clamping force stated for every type.
Surface-friendly
Soft protective jaws for delicate parts.
Proven quality
Rugged clamps for continuous use.
Expert advice
We help you pick the right size.