Nominal Diameter | Width across flats mm |
Art.-No. |
1.1/8 x 8 UN | 60 x 25 | 24171 |
1.1/4 x 8 UN | 60 x 25 | 24172 |
1.3/8 x 8 UN | 60 x 25 | 24173 |
1.1/2 x 8 UN | 70 x 30 | 24174 |
1.5/8 x 8 UN | 70 x 30 | 24175 |
1.3/4 x 8 UN | 85 x 36 | 24176 |
1.7/8 x 8 UN | 85 x 22 | 24177 |
2″ x 8 UN | 85 x 22 | 24178 |
2.1/8 x 8 UN | 85 x 22 | 24179 |
2.1/ 4 x 8 UN | 100 x 22 | 24180 |
2.1/2 x 8 UN | 115 x 22 | 24181 |
3″ x 8 UN | 4.5″ x 1.125″ | 24182 |
3.1/2 x 8 UN | 5″ x 1.125″ | 24183 |
VOLKEL Thread circular round dies are used for producing external threads. Round dies are round and usually have three or more cutting edges. They are either used for manual use of die holders or clamped into the quill to use in a turning lathe.
The chips are discharged through the plane holes in round dies. VOLKEL Round dies are available slotted or solid, with solid being the most commonly used style. The groove in slotted round dies allows these to be adjusted if worn while solid dies are able to produce more precise pitch of thread. Dies also come in round solid circular form or Hexagon die nut Form.
The Unified thread 8 series (8-UN) is a uniform-pitch series for large diameters. Although originally intended for high-pressure-joint bolts and nuts, it is now widely used as a substitute for the Coarse-Thread Series for larger diameters. The allowances/tolerances (class) for external Unified Threads are designated by the letter ‘A’ preceded by a number for example, class 1A, 2A, or 3A.