Made in USA Rotary chucks operate the same as the rectangular chucks and are of the same construction with poles running off the edge. Top plates on all models are of magnetic steel and nonmagnetic stainless furnace brazed construction. Ideally rotating spindles. To withstand the high torque of used on lathes, grinders and other machinery with heavy lathe cuts, dowel pins or screws may be inserted in the top plate. Chuck top plates may be machined for work with odd configurations or an auxiliary plate may be added and removed for other work, leaving the original plate intact.
The ST series is not water-tight and should not be used with coolant. Handles are removable.
High Power Standard Pole Magnet Chucks
| Model | Dimensions | # of Holes | Pole Spacing | Weight in lbs | |||||
| A | B | C | D | E | F | ||||
| *ST 2-1/2 R | 2-5/8 | 2-9/16 | 1-7/8 | 2 | 1/4-20 x 3/8 | 1-5/8 | 2 | 1/8 | 1-1/2 |
| *ST 4-1/8 R | 4-3/16 | 4-1/8 | 2-3/16 | 3-3/4 | 1/4-20 x 3/8 | 3 | 3 | 1/4 | 5 |
| *ST 5-1/4 R | 5-3/8 | 5-1/4 | 1-15/16 | 4-3/4 | 1/4-20 x 3/8 | 4 | 4 | 3/8 | 7-1/2 |
| SP 6 R | 6-5/16 | 6-3/16 | 2-13/16 | 4-1/2 | 3/8-16 x 3/8 | 3-3/4 | 4 | 3/8 | 15 |
| SP 8 R | 8-1/8 | 8 | 2-13/16 | 4-1/2 | 3/8-16 x 3/8 | 3-3/4 | 4 | 3/8 | 27 |
| SP 10 R | 10-1/4 | 10 | 3-3/4 | 8 | 3/8-16 x 5/8 | 6-3/4 | 4 | 3/8 | 49 |
| SP 12 R | 12-1/8 | 12 | 3 | 8 | 3/8-16 x 1/2 | 7 | 4 | 3/8 | 63 |
| SP 16 R | 16-1/8 | 16 | 3-1/2 | 12 | 3/8-16 x 1/2 | 8 | 4 | 3/8 | 140 |
| SP 20 R | 20-1/4 | 20 | 3-5/8 | 16 | 3/8-13 x 1/2 | 10 | 4 | 3/8 | 205 |
High Power Fine Pole Magnet Chucks
| Model | Dimensions | # of Holes | Pole Spacing | Weight in lbs | |||||
| A | B | C | D | E | F | ||||
| FP 6 RD | 6-5/16 | 6-3/16 | 3 | 4-1/2 | 3/8-16 x 3/8 | 3-3/4 | 4 | 1/8 | 16 |
| FP 8 RD | 8-1/8 | 8 | 3 | 4-1/2 | 3/8-16 x 3/8 | 3-3/4 | 4 | 1/8 | 25 |
| FP 10 RD | 10-1/4 | 10 | 3-3/4 | 8 | 3/8-16 x 5/8 | 6-3/4 | 4 | 1/8 | 49 |
| FP 12 RD | 12-1/8 | 12 | 3 | 8 | 3/8-16 x 3/8 | 7 | 4 | 1/8 | 63 |
Laminated Parallels
- Furnace Brazed – will not come apart when machined sawed or formed.
- Laminations – 1/16″ iron – 1/16″ stainless steel for high magnetic permeability.
- Hold Odd shapes and sizes for grinding or inspection
These accessories increase the versatility of your magnetic chucking equipment. They extend chuck’s magnetic holding power above working surface. Auxiliary plates made to match pole dimensions of present chuck with horizontal or vertical poles.
Parallel Bars
| Height (inches) | Width (inches) | Length (inches) |
| 1/2 | 1 | 3 |
| 1/2 | 1 | 6 |
| 1 | 2 | 3 |
| 1 | 2 | 6 |
| 1 | 4 | 6 |
| 1 | 4 | 8 |
V Blocks
| Height (inches) | Width (inches) | Length (inches) |
| 1 7/8 | 3 1/2 | 3 1/2 |
| 2 1/4 | 6 | 6 |