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This section provides an overview for id clamps as well as their applications and principles. Also, please take a look at the list of 9 id clamp manufacturers and their company rankings. Here are the top-ranked id clamp companies as of December, 2025: 1.Imao, 2.Rovi Products Inc., 3.Wixroyd Group Ltd.
Table of Contents
Categories Related to ID Clamps
An ID clamp is a cutting jig. After centering a workpiece with a hole for location, the clamping jig secures the workpiece from the inside by the wall of the hole. The mouth part of the clamp is divided into several parts, which are spread by the clamping operation to fix the ID clamp on the inside diameter of the workpiece. By clamping the workpiece only from the inside, interference between the clamping jig and the machining tool is avoided, making it suitable for clamping workpieces with many machining points, multiple-piece machining, and thin-walled parts.
The clamp drive system can be manual, pneumatic, or hydraulic, and the easy-to-use manual ID clamp is widely used.
Since the workpiece location hole is used for clamping, highly accurate positioning is possible.
Since cast parts have large tolerances on the periphery, ID clamps that use a hole for locating are often used. ID clamps are also used when there is no clamping point on the periphery of the workpiece, when the clamping fixture interferes during machining, when the workpiece is thin-walled, or when a special jig is used to clamp numerous pieces.
Some ID clamps can also be clamped from the outside of the workpiece by replacing the (clamping) clamp. This makes it easy to clamp even complex-shaped workpieces and is convenient for use in multi-cavity and dive machining.
When machining the top or side surface of a workpiece, the machining tool may interfere with the clamping jig when clamping in the vertical or horizontal direction. In this case, the use of ID clamps, which do not clamp the outer surface of the workpiece, eliminates the interference and allows the outside of the workpiece to be machined freely.
When many workpieces need to be clamped at once to increase productivity, the clamping jig takes up a lot of space, limiting the number of clamps that can be installed. With the compact ID clamps, a large number of workpieces can be clamped, allowing continuous machining in a single setup.
For thin-walled workpieces, the use of a standard 3-jaw chuck may cause clamping distortion due to uneven clamping force. In this case, the use of an ID clamps is suitable. ID clamps have a finely divided clamping jaw that presses evenly on the ID of the workpiece, thus minimizing workpiece distortion.
ID clamps have the advantage that the workpiece can be positioned precisely at the same time if clamped. The holes used for clamping are highly accurate, and by tightening the screw, the mortise part of the mouthpiece opens and clamps from the inside, allowing repeated positioning with high accuracy.
*Including some distributors, etc.
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Northwestern Tools is a machine tooling manufacturer and supplier founded in 1942 in Dayton, Ohio. The company's diverse catalog includes clams, workholding, fasteners, linear motion devices, valves, and more. It includes multiple ready-to-ship items from brands like Elsea, Kipp and Jergens. The company produces specialized tooling, clamping and work-holding components, spring and ball plungers, fasteners, thread repair inserts, knobs and handles and hoist rings. Its products are used in the aerospace, medical, fastener, and lifting and material handling industries.
Rovi Products Inc., established in 1965, is a manufacturer and supplier of work-holding products and machine shop accessories based in California, USA. The company offers a comprehensive range of workholding products, including chuck jaws, collect accessories, collet chucks, and collet fixtures. These products are essential for securely holding workpieces during machining processes. The company also offers cutting tools, expanding collets, indexers, and accessories such as coolant nozzles, mist collectors, mandrels, tool holder bushings, and more. The company ships its products daily to customers throughout and abroad.
Jergens, Inc. established in Cleveland, OH in 1942 is a manufacturer of Workholding, Lifting and Specialty Fasteners products. Their product portfolio includes clamps, vises, fixtures, and chucks, used for precise and stable workpiece positioning in machining and assembly processes. The company serves industries Renewable Energy, Mining and Exploration, Marine and Offshore, Electronics and Semiconductors and Telecommunications. The company has ISO 9001:2015 and AS9100:2016 certification and have global delivery and customer support..
Shars Tool is an American wholesale distributor of industrial equipment and machinery that was established in 1978 in Saint Charles, Illinois. The company stocks various hand and power tools, abrasives, and cutting tools, as well as machinery like mills and lathes. They also offer material handling equipment like carts and bins, as well as safety accessories like goggles and gloves. Shars Tool chiefly serves client companies and businesses in the metalworking, DIY, home maintenance, and hobby markets, as well as select e-retailers such as LittleMachineShop.com.
Mitee-Bite Products LLC, founded in 1986 and based in Center Ossipee, New Hampshire, is a manufacturer of high-density, profile clamping products such as vacuum systems, Vise jaws, manual actuators, and replacement parts for CNC machining. The company’s products include collet wrenches, PSI vacuum gauges, locating pins, and long-length serrated grips. The products are used in manufacturing, construction, fabrication, and heavy-duty industries. The company holds trade shows in Las Vegas, Portland, West Springfield, Hannover, and Toronto.
Newman Tools, Inc., established in 1995 and based in Ottawa, Ontario, Canada, is a supplier of mini ratchet tools and welding inspection gauges. The company also supplies materials such as diameter tapes, dial indicators, valve wheel wrenches, and honing tools catering to machine shops, plant engineering, and maintenance places. The company has tools of different sizes and from different brands. The company has lubricants and sealants that are used in the nuclear industry.
Wixroyd Group Ltd, incorporated in 1951, is a supplier of design elements, machine accessories, camping & fixturing parts, and access components. The firm in Portfield Works, Chichester, supplies design elements such as sealing screws, ball lock pins, rod ends & joints, leveling feet, and load rings. The access components include cam latches, hinges & dampers, draw latches, masking inserts, and drawer slides. The work-holding equipment is self-aligning pads, lifting eye bolts, base plates, toggle clamps, and gauges. The Wixroyd Group comprises companies such as Automotion Components Ltd, Anti-VIbration COmponents Ltd, Coburg Components Ltd, and Nylon & Alloy Ltd.
Ranking as of December 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Imao |
23.5%
|
| 2 | Rovi Products Inc. |
17.6%
|
| 3 | Wixroyd Group Ltd |
11.8%
|
| 4 | Newman Tools, Inc. |
11.8%
|
| 5 | Northwestern Tools |
11.8%
|
| 6 | Carr Lane Manufacturing |
11.8%
|
| 7 | Jergens, Inc. |
11.8%
|
Derivation Method
The ranking is calculated based on the click share within the id clamp page as of December 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
5 | 71.4% |
|
Japan
|
1 | 14.3% |
|
United Kingdom
|
1 | 14.3% |
402 products found - Page 3
402 products - Page 3
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