Items 280524 and 280525: Siegmund Fast Clamping Bolt flat without slot, burnished, double and triple, for System 28. Siegmund uses this flat bolt mainly for clamping elongated holes; like the countersunk bolt it reduces protrusion, and it suits cordless screwdrivers up to 25 Nm. BTH Sales is the exclusive Canadian importer of Siegmund.
Specifications
| Siegmund article | 280524 (siegmund.com) | 280525 (siegmund.com) |
|---|---|---|
| Description | Fast Clamping Bolt flat without slot double burnished | Fast Clamping Bolt flat without slot triple burnished |
| System | Siegmund System 28 (Ø28 mm bores, 100 mm grid) | |
| Length | 74 mm (2.91 in) | 99 mm (3.90 in) |
| Weight | 0.36 kg (0.79 lb) | 0.42 kg (0.93 lb) |
| Components clamped | 2 | 3 |
| Hex socket | size 6 | |
| Tightening torque, steel | 25 Nm | |
| Tightening torque, aluminum | 10 Nm | |
| Finish | Burnished | |
| GTIN | 4251805926859 | 4251805926866 |
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.
- Siegmund System 28: fits every System 28 Siegmund table, including the Professional Extreme 8.7 and 8.8 PLUS tables listed on bthsales.ca; Siegmund says it "MUST NOT be used for connecting tables and U-shaped squares".
- 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.
- Not for: connecting tables and U-shaped squares (Siegmund). Siegmund's connecting bolts are designed for that.
- Care & grounding: anti-spatter spray, CleanBasic cleaner, Ground Connection Comfort (S16/S28).
What's included
Choose one option; each option is one piece:
- 1 x Siegmund Fast Clamping Bolt flat without slot double burnished (280524)
- 1 x Siegmund Fast Clamping Bolt flat without slot triple burnished (280525)
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
- Clamping in elongated holes with reduced protrusion (Siegmund).
- Suitable for aluminum profiles (Siegmund).
- 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
Can I drive it with a cordless screwdriver?
Siegmund says it is ideal for a cordless screwdriver with up to 25 Nm turning moment.
Can I use this bolt to connect two tables?
No. Siegmund says this bolt must not be used for connecting tables and U-shaped squares. For that, use a Siegmund System 28 connecting bolt.
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 Fast Clamping Bolt without Slot
- System 16 Fast Clamping Bolt Flat without Slot
- All Siegmund System 28 bolts
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.
