Grinding the front end, make sure that after the thread is formed, the thread accuracy should be 6g.
Rod Diameter Diameter after grinding
35 mm 33.22~33.32 mm
40 mm 38.88~38.95 mm
45 mm 44.50~44.80 mm
53mm 52.15~52.35 mm
Rolling thread into requested length according to drawings, and measure the length by regular rules piece by piece. Make sure 100% qualified. Acc.to GB/T 196 – GB/T 197 ISO 724:1993
More information for standard, please refer to our download page in this website.
1. According to the requirements of ” thread rolling notice”, workers choose proper rollers, guiding board, and adjust oil pressure, then write on the rolling record notebook and production procedure card carefully.
2. Requirements: locate the roller from radial direction, use ring-shape roller to pull thread to the settled position. After formed, thread should be tested easily to pass by screw thread ring gauge with a slightly motion, without any blocks or sluggish. Thread gauge should only pass not more than 2 pitch.
Thread Rolling Cylindrical Dies Specification
|Oil Pressure in
|Annular oil pressure|
Note: if anchor bolt or hold down bolt sizes are not in above list, should follow the “thread rolling notice”
Contact us now!
Anyang Longteng Heat Treatment Material Co.,Ltd
Add: Industrial Park, Indu District, Anyang City, Henan Province, P.R.C.
Email: [email protected]
Post time: Oct-18-2018