This stainless steel worm gear clamp can withstand more than 4 times the standard SAE torque requirements for Type F worm-drive clamps. The 5/8-inch wide band and the 5/16-inch hex screw assembly of DGX Hi-Torque Stainless Steel cylinder clamps are entirely made of 316-series stainless steel. This is an "American-style" clamp where the grooves in the band are perforated completely through the band, however eight screw threads are engaged simultaneously to support up to 150 inch-pounds of torque. This particular Hi-Torque design is engineered to tolerate an exceptional amount of torque on the worm drive, the downside being the thickness and width of the band, screw assembly and housing are slightly larger and the screw assembly housing will not easily fit inside our worm drive cover. (Hint: Soak the cover in water, then use a pair of needle-nose pliers to pull the cover over the housing.)

Over-tightening standard clamps by applying maximum effort with a hand screwdriver, it is possible to either break the grooves on the band or rupture the worm drive housing. Our tests of the high-torque stainless steel cylinder clamps found no amount of hand screwdriver torque was able to cause them to fail. This does not mean that it is impossible to over-tighten the high-torque versions enough to break the clamp (for example if you use a power tool); it is just much more difficult.

The Small clamp fits diameters from approximately { 4.0 in | 10 cm } up to { 6.0 in | 15 cm }. This is most 4 inch and 5 inch cylinders such as the LP50, AL8, AL13, AL19, AL20, AL30, AL40, FX15, and FX23. It will NOT fit the tiny AL6. The Large fits diameters from approximately { 7.0 in | 18 cm } to { 8.0 in | 20 cm }. This is all 7 inch and 8 inch cylinders such as the LP85, AL72, AL80, HP80, HP100, HP117, HP120, and HP130.

Once snugged to the cylinder, the clamp will always have some excess 'tail' remaining. If this is a concern, you can tuck the excess inside a webbing sheath or trim off the excess. If you trim the excess, the remaining edge may be sharp so be prepared to also file the end a little to make it smooth.