Cam clamp tool

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Add to Order. Previous Next Submit. Cam Clamps Guide Cam clamps are also based on the principle of the inclined plane. Eccentric Cams Eccentric cams, as their name implies, apply the clamping force with the action of an eccentric circle. Figure Eccentric cams should usually not be used for clamping because they do not provide positive locking. Spiral Cams Continuous-rise spiral cams, through similar in appearance to eccentric cams, differ substantially in their operational principles.

Rather than using an eccentric circle to achieve its rise, this cam has an involute curve on the clamping face of the cam. This design provides a wide range of clamping positions instead of just one. The two principal types of spiral cams are the single cam and the double cam, Figure Direct-Pressure and Indirect Pressure Clamping Cams are typically used in two styles of clamping, direct pressure and indirect pressure.

As shown in Figure , direct-pressure cams apply the force directly to the workpiece a. Indirect-pressure cams apply the clamping force through a secondary clamping element b. The main objections to direct pressure clamps are the susceptibility of the clamps to vibration and the marring of the workpiece. The indirect pressure clamps are less prone to problems, but heavy vibration remains an issue. Spiral cams have a continuous rise to lock positively at any point in the clamping range. Indirect pressure cam clamps are safer because they are not affected by workpiece vibration.

Building and Machinery Hardware. Cam Handles. Heavy Duty Cam Handles. Expanding Cam Handles for Unthreaded Holes.

T-Slotted Framing Toggle Clamps. Hold-Down Toggle Clamps. Nonreflective Hold-Down Toggle Clamps. Compact Hold-Down Toggle Clamps. Undermount Hold-Down Toggle Clamps. Mount these clamps below a surface. These clamps have mounting holes on the bottom.

Holding Screws for Toggle Clamps. Replace worn screws or customize your clamps. Tips for Toggle Clamp Holding Screws. Bar-Style Hold-Down Clamps. Mount the base to a work surface using screws. Reverse-Action Push Toggle Clamps. Auto-Adjusting Push Toggle Clamps.

Push Toggle Clamps with Locking Handle. Push Toggle Clamps with Rotating Handle. Secure these clamps to a rail or bar. Air-Powered Push Toggle Clamps. Latch-Style Toggle Clamps. Miniature Spring Clamps. Locking Miniature Spring Clamps. Press the lever to lock the clamp onto material. Spring Clamps. Insulated Spring Clamps. Extended-Reach Spring Clamps. Adjustable-Jaw Spring Clamps. Spring Clamps with Flexible Arm. Spring Clamps with Telescoping Handle. Clothespins and Spring Clips.

Revolving Screw Clamps. Screw Clamps. Hole-Mount Screw Clamps. Hold-Down Machine Table Clamps. Fixturing Track. Cam Clamping Levers. The quick brown fox jumped over the lazy dog. Pedestal 35" Ht. Threaded Stud. Threaded Hole. Weld On. Expanding Plug. In Fig. Clamps of this type are rotated to clear the job when the later is removed from the fixture. The stud turned on the end of the heel passes through an elongated slot and fits loosely into the keyway in the clamp bar.

This is provided so that when a nut is slacked off, the clamp may be drawn back clear of the work in order that the component may be more easily loaded into the fixture. The compression springs beneath the clamps are provided to clamp up against the nut to free the operator from the necessity of picking up the clamp and manoeuvering it over the work.

Strap clamp can be operated by either manual or power driven devices. Manual devices include hexagonal nuts, hand knobs, and cams Refer Fig. The holding power of a strap clamp is determined by the size of the threaded member binding the clamp. These are widely used for jigs and fixtures. These have lower costs. However, their operating speed is quite slow. The basic screw clamp uses the torque developed by a screw thread to hold a part in place.

This is done by direct pressure or by acting on another clamp. Refer Fig. There are variations of the screw-type clamp. Numerous styles of commercial clamps have been developed to include advantages of the screw clamp and reduce its disadvantages. The efficiency of the screw clamp can be improved by using swing clamps, hook clamps and quick acting knobs.

Swing clamps combine the screw clamp with a swinging arm which pivots on its mounting stud. Quick acting knobs are made so that when pressure is released, they can be tilted and slid off a stud, Refer Fig. The knob is slid over the stud until it contacts the part. It is then tilted to engage the threads and turned until tight.

Cam-action clamps, when properly selected and used, provide a fast, efficient, and simple way to hold work, Refer Fig. Due to their construction and basic operating principles, the use of cam-action clamps is limited in some types of tools. These utilise hinged lids for loading and unloading the components. Generally the clamp is made integral with the hinged lid. This type of clamp is often required when it is necessary to move both the clamp and the bolt completely out of the way for the loading of component.

The jig casing is designed such that the lugs are provided for locating the hinge pins. It is only suitable for light clamping. The clamping lever is hinged on the clamping bar which, in its turn, is hinged on the fixture. Along the clamping bar is fitted a floating pad which holds the work and the clamping lever is then forced against a pin or other abutment fitted to the fixture. The component is used over a locating pin and the clamping plate is swung into position under the nut.

The essential feature is that once the clamp has been removed, or swung away, the component can pass freely over the nut which means that the locking nut requires about one turn to release or lock the clamp and is, therefore, quick acting. Clamping force is applied to the top and one side of the work piece. The clamp has a quick release action. In this arrangement, the length of the levers should be approximately such that equal pressure is applied by each clamp at its clamping position.

The top clamp is slotted at the end so that the whole of its clamping mechanism could be swung clear of the work. The wedge could be operated either manually by a screw or cam, or by pneumatic or hydraulic cylinder in which case automatic clamping of the work piece as part of a fully automatic machine cycle is possible.

Large angel self-releasing wedges are used where large movement is required. In these wedge clamps, another holding device came or screw is required to hold and wedge the work piece in place. These provide a fast, efficient, and simple way to hold work. If cam clamps apply pressure directly to work and work is subjected to vibration, then clamp may loosen and such clamp should not be used.

Direct pressure cam clamps must be positioned to resist the natural tendencies of the clamp to shift or move the work when the clamp is engaged. To prevent this movement, the clamp is always positioned such that work is pushed into the locators when pressure is applied.

The advantages of cam action can be obtained in indirect clamping method by using cam action rather than screw threads to bind strap clamps. In this method, the possibility of loosening or shifting the work during clamping is decreased. There are three basic types of cams used for clamping mechanisms: Flat eccentric, flat spiral, and cylindrical. Flat eccentric cams are easiest to make and can operate in either direction from their centre position.