Item 280612.N: Siegmund Professional Screw Clamp XL, nitrided, for System 28 welding tables with Ø28 mm bores. Siegmund designed it for tasks that need special effort: it clamps with up to 7 kN, uses 35 x 14 mm flat bar, and its force can be set precisely with a torque wrench. BTH Sales is the exclusive Canadian importer of Siegmund.
Specifications
| Siegmund article | 280612.N (siegmund.com) |
|---|---|
| System | Siegmund System 28 (Ø28 mm bores, 100 mm grid) |
| Width | 220 mm (8.66 in) |
| Height | 310 mm (12.20 in) |
| Weight | 3.52 kg (7.76 lb) |
| Max. clamping force | 7 kN (≈ 1,574 lbf) |
| Finish | Nitrided |
| Spindle | Ball diameter 16 mm, trapezoid thread 20 x 4 mm |
| Flat bar | 35 x 14 mm; vertical bar reinforced; bars available in various lengths |
| Prism | Interchangeable |
| Force setting | Countersunk hexagon socket at the top of the handle, for a torque wrench |
| Height adjustment | Handwheel on the cast iron cross |
| GTIN | 4251805923636 |
Compatibility
- Fits: Siegmund System 28 welding tables and tooling with Ø28 mm bores on a 100 mm grid. Siegmund System 28 accessories also fit other 28 mm system welding tables with Ø28 mm bores on a 100 mm grid. Compatible tables from other manufacturers are often made from different materials and to different standards, so quality varies by manufacturer, compared with Siegmund's X8.7 tool steel.
- Not compatible: System 16 (Ø16 mm) tables; Siegmund builds each system around one bore size.
- Works with: other Siegmund System 28 clamps, bolts, stops, squares and U-squares on the same table.
- Care & grounding: anti-spatter spray, CleanBasic cleaner, Ground Connection Comfort (S16/S28).
What's included
- 1 x Siegmund Professional Screw Clamp XL nitrided (280612.N)
Engineering support & demos
Engineering support comes with your purchase: fixture design, layout drawings, CAD and 3D models, site visits and cobot cell planning, handled by Travis Hardcastle at BTH Sales or by Siegmund directly. BTH Sales does not sell cobots; for cobot cells we help with table integration and fixturing (see cobot welding with Siegmund tables). Live demos at our St. Marys showroom are by appointment (book a demo), and we offer video demos if you are outside Ontario. BTH Sales is family-owned, founded in 2001, and has been the exclusive Canadian importer of Siegmund since 2018.
Typical uses
- Heavy clamping jobs: Siegmund designed the XL especially for tasks that require special effort.
- Longer reach: Siegmund offers the horizontal and vertical bars in various lengths.
- 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 these sectors: Agriculture; Interior; 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; Woodworking.
Frequently Asked Questions
When should I choose the XL over the standard Professional screw clamp?
Choose the XL when you need more clamping force. Siegmund rates the XL (280612.N) at 7 kN with 35 x 14 mm flat bar, and the standard Professional Screw Clamp (280610.N) at 5 kN with 30 x 10 mm and 30 x 14 mm bars. Siegmund designed the XL especially for tasks that require special effort.
Can I set the clamping force precisely?
Yes. Siegmund says the countersunk hexagon socket at the top of the handle lets you adjust the force precisely with a torque wrench.
Can I replace worn parts instead of buying a new clamp?
Yes. Siegmund sells the spare parts individually. Its parts list for this clamp is 280639.N, 280638.N, 280617.1, 280662.2, 280618.N, 280634.N and 280657.1.N. Email sales@bthsales.ca with the part number you need.
Will it fit other 28 mm welding tables?
Yes, if the table has Ø28 mm bores on a 100 mm grid. Check the bore diameter and grid before ordering. Compatible tables from other manufacturers are often made from different materials and to different standards, so quality varies by manufacturer, compared with Siegmund's X8.7 tool steel.
Related parts
- System 28 Professional Screw Clamp (280610.N)
- System 28 Professional Screw Clamp 45°/90° (280630.N)
- System 28 vertical bars for 280612
- System 28 horizontal bars for 280612
- System 28 prism for screw clamps
- All Siegmund System 28 welding table clamps
Ships across Canada from 5 Industrial Rd, St. Marys, ON N4X 1G2, or pick up from our warehouse. Most orders ship within 48 hours. Email sales@bthsales.ca or call +1-519-461-1381 with questions or for a freight quote.
