Item 2-280571 (280571): the Siegmund Fast Clamping Bolt Adjustable without Slot is a burnished System 28 fast clamping bolt whose clamping height is set with a knurled thimble ring, for laser-cut profiles of varying thickness. Sold in Canada by BTH Sales, exclusive Canadian importer of Siegmund; ships from St. Marys, Ontario.
The double clamps 25–50 mm and the triple 50–75 mm; it has a screw top, no O-ring slot, and Siegmund lists it as suitable for aluminum profiles. Siegmund says this bolt must not be used to connect tables or U-shaped squares; use a connecting bolt for that.
Specifications
| Item no. | Siegmund name | Length | Weight | Shearing Force | Tightening Torque Steel | Tightening Torque Aluminum | Tensile Force Steel |
|---|---|---|---|---|---|---|---|
| 2-280571 (280571) | Fast Clamping Bolt adjustable without slot double burnished | 115 mm (4.53 in) | 0.67 kg (1.48 lb) | 220 kN (49,458 lbf) | 25 N·m (18 lbf·ft) | 10 N·m (7 lbf·ft) | 25 kN (5,620 lbf) |
| 2-280573 (280573) | Fast Clamping Bolt adjustable without slot triple burnished | 140 mm (5.51 in) | 0.83 kg (1.83 lb) | 220 kN (49,458 lbf) | 25 N·m (18 lbf·ft) | 10 N·m (7 lbf·ft) | 25 kN (5,620 lbf) |
Compatibility
- Fits: Siegmund System 28 tables, tools and aluminum profiles (28 mm bores). Also fits other 28 mm system welding tables with Ø 28 mm bores on a 100 mm grid, within its clamping dimension of 25–50 mm (double) or 50–75 mm (triple).
- Not compatible with: System 16 (Ø 16 mm bores) or System 22 (Ø 22 mm bores) tables and tools – use the Siegmund S16 Fast Clamping Bolt Adjustable without Slot.
- Works with: Siegmund S28 Fast Clamping Bolt without Slot.
What's included
1 × adjustable fast clamping bolt, double (2-280571) or triple (2-280573).
Typical uses
- Clamping laser-cut profiles of varying thickness
- Adjusting the clamping height by turning the knurled thimble ring
- Clamping aluminum profiles (tighten hand-tight only)
- Light to heavy workpieces: Siegmund describes System 28 as ideal for light to heavy components and designed for maximum clamping forces, multi-ton structures and high distortion forces
Industries served: Siegmund's published practical examples show its welding tables and tooling in agriculture, interior fit-out, lighting and electrical engineering, machine tools and plant construction, measurement and testing technology, motorcycle engineering, revolving door systems, robotic technology, stage technology, stainless steel processing, steel, sheet metal and metal construction, textile production, train construction, vehicle construction, welding technology and woodworking.
FAQ
What clamping range does it have?
Siegmund lists a clamping dimension of 25 to 50 mm for the double (2-280571) and 50 to 75 mm for the triple (2-280573).
How is the clamping height adjusted?
By rotating the knurled thimble ring on the bolt, per Siegmund.
Can I connect two tables with it?
No. Siegmund says this bolt must not be used to connect tables or U-shaped squares; use a connecting bolt for that.
Will it fit a System 16 table?
No. It is for 28 mm bores. Use the System 16 version.
Will it fit other 28 mm welding tables?
Yes, if the table has Ø 28 mm bores and the total material thickness is within the bolt's clamping dimension: 25–50 mm for 2-280571 or 50–75 mm for 2-280573. Check your table's bore diameter and plate thickness before ordering.
