Preparation of workpieceThe workpiece to be rolled has to be produced to the preworking diameter. This is approximate because of the variety of rollable materials; it will, if necessary, be increased in steps of 0.01 mm, until the thread is fully developed. A further increase of the diameter could do harm to the tool by overload.Rolling speedWe recommend 20 to 50 m/min. Non-ferrous metals are to be rolled in the upper speed range, free machine steel in the intermediate and difficult-to-machine steel in the lower range. Sufficient lubrication with cutting fluid is required.Rollable materialsJBO thread rolling dies are fit for cold formingmaterials with min. extension of approx. 8 % and up to approx. 900 N/mm² 2 strength. The workpiece needs a chamfer of 15 - 20° for the material to start rolling easily. Chamfer and preparing diameter need to run concentrically.
TABULAR PRODUCT DATA
| Item no. | M2,5 |
| Total length mm | 8 |
| B5 mm | 8 |
| Field of application (material to be processed) | P |
| Application area P Steel | TRUE |
| Application area M Stainless | FALSE |
| Application area K casting | FALSE |
| Application area plastics | FALSE |
| Application area S Superalloys | FALSE |
| Application area H Hardened steel | FALSE |
| Application area N Non-ferrous metals | FALSE |
| Body diameter mm | 12 |
| Total length mm | 8 |
| Nominal thread diameter metric | M2,5 |
| Thread pitch mm | 0,45 |
| Flank angle | 60 |
| Thread type | M |
| Nominal thread diameter | M2.5 |
| A21 metric | M2.5 |
| B3 mm | 8 |
| A3 mm | 0,45 |
| A3 | 0,45 |
| Thread rolling die | starr |
| A7 mm | 12 |
| Workpiece diameter mm | 2,13 |
| Thread | M2,5 |
| Ø mm | 12 |
| Workpiece Ø mm | 2.13 |
| Nominal thread diameter metric | M2,5 |
| Total length mm | 8 |
| Total length mm | 8 |
| Thread type | M |
| Application area K casting | FALSE |
| Application area plastics | FALSE |
| Application area M Stainless | FALSE |
| Application area P Steel | TRUE |
| Application area S Superalloys | FALSE |
| Nominal thread diameter metric | M2,5 |
| Workpiece diameter mm | 2,13 |
| Total length mm | 8 |
| Thread pitch mm | 0,45 |
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