Bessey Auto Adjust Toggle Clamps

Q: What fasteners do I need to mount them?

The heavy-duty flanged base is designed for M5 or 3/16" fasteners on the IHH15 and HH20 models, and M6 or 1/4" fasteners on the HH50 and HH70. Fasteners are not included.

Q: Does this clamp push or press down?

This is an inline style of toggle that pushes forward to clamp; it does not press down. Keep that orientation in mind when designing your jig.

Q: What is the holding capacity?

Holding capacity is 450 lbs on the IHH15 and HH20 models and 700 lbs on the HH50 and HH70 models.

Q: How big is the base plate?

The flanged base plate measures 2-1/4" wide by 2-1/2" long and features multiple mounting points for fixture-building flexibility.

Q: Will the clamp mar my workpiece?

A removable non-marring plastic cap covers the 7/8" diameter swivel pad to protect your work surface.

Description Reviews Q&A Documents

Auto-Adjust Toggle Clamps - Revolutionary Workholding For Your Shop!

Whether woodworking is your hobby or your profession you should seriously consider these Auto Adjust Toggle Clamps for your shop. They give your woodworking jigs another dimension of speed, accuracy and convenience. Unlike conventional Toggle Clamps that need to be re-adjusted every time your material thickness changes, these Toggles automatically maintain constant clamp pressure. No more stopping to manually adjust the lock nut and pressure pad height, simply switch material thickness and clamp as you did before. Now that is a huge time saver!

Features Include:

Automatically adjusts to variations in work piece thickness while maintaining constant clamping force
Adjustable clamping force via the integrated set screw lets you add or subtract holding power as you see fit
Heavy duty flanged base plate features multiple mounting points for ultimate fixture building flexibility
Heavy duty flanged base designed for use with M5 or 3/16" fasteners (not included)
Large handle with soft rubber inserts provides all-day comfort even in a production environment
Removable non-maring plastic cap covers the 7/8" diameter swivel pad

Specifications of this STC-IHH15 clamp as follows:

Note: this inline style of toggle 'pushes' forward to clamp and does not 'press' down
Accepts stock thickness from 0" to 2" with 1" of pad depth adjustment
Handle lock position is horizontal
Heavy duty flanged base designed for use with M5 or 3/16" fasteners (not included)
Maximum opening is
Nominal clamping force range from 25-550 lbs.
Holding capacity 450 lbs.
Base plate - 2-1/4" W x 2-1/2" L

Specifications of this STC-HH20 clamp as follows:

Accepts stock thickness from 0" to 1-1/2" with 1/2" of pad height adjustment
Handle lock position is horizontal
Heavy duty flanged base designed for use with M5 or 3/16" fasteners (not included)
Nominal clamping force range from 25-250 lbs.
Holding capacity 450 lbs.
Base plate - 2-1/4" W x 2-1/2" L

Specifications of this STC-HH70 clamp as follows:

Accepts stock thickness from 0" to 2-1/4" with 1" of pad height adjustment
Handle lock position is horizontal
Heavy duty flanged base designed for use with M6 or 1/4" fasteners (not included)
Nominal clamping force range from 25-550 lbs.
Holding capacity 700 lbs.
Base plate - 2-1/4" W x 2-1/2" L

Specifications of this STC-HH50 clamp as follows:

Accepts stock thickness from 0" to 1-1/2" with 1/2" of pad height adjustment
Handle lock position is horizontal
Heavy duty flanged base designed for use with M6 or 1/4" fasteners (not included)
Nominal clamping force range from 25-550 lbs.
Holding capacity 700 lbs.
Base plate - 2-1/4" W x 2-1/2" L

Bessey Auto Adjust Toggle Clamps Spec Sheet

Frequently Asked Questions

How do auto-adjust toggle clamps work?

They automatically maintain constant clamping force as work piece thickness changes, so you don't have to re-adjust the lock nut and pad height every time you switch material. Browse more toggle clamps.

Can I adjust the clamping force?

Yes. An integrated set screw lets you add or subtract holding power as you see fit. Nominal force ranges from 25 lbs up to 550 lbs depending on the model.

What stock thickness do they accept?

It depends on the model: the STC-IHH15 handles 0" to 2", the STC-HH20 and STC-HH50 handle 0" to 1-1/2", and the STC-HH70 handles 0" to 2-1/4".

What fasteners do I need to mount them?

The heavy-duty flanged base is designed for M5 or 3/16" fasteners on the IHH15 and HH20 models, and M6 or 1/4" fasteners on the HH50 and HH70. Fasteners are not included.

Does this clamp push or press down?

This is an inline style of toggle that pushes forward to clamp; it does not press down. Keep that orientation in mind when designing your jig.

What is the holding capacity?

Holding capacity is 450 lbs on the IHH15 and HH20 models and 700 lbs on the HH50 and HH70 models.

How big is the base plate?

The flanged base plate measures 2-1/4" wide by 2-1/2" long and features multiple mounting points for fixture-building flexibility.

Are these clamps comfortable for production use?

Yes. The large handle has soft rubber inserts that provide all-day comfort even in a production environment.

Will the clamp mar my workpiece?

A removable non-marring plastic cap covers the 7/8" diameter swivel pad to protect your work surface.

What else pairs with these toggle clamps?

Pair them with other clamping tools and bar clamps to complete your jig and fixture workholding.

Bessey Auto Adjust Toggle Clamps