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Bearing Steel Wire (52100): Drawn from Bar Through a Drawplate
Bearing balls are headed from thick wire of 52100 steel. Here 52100 bar is forged to rod and drawn through a drawplate. At 1 % carbon it is much harder than mild steel, so it is annealed soft before drawing and again after every two holes, using the 52100 anneal Verhoeven recommends.
The picture: our drawing, bar to coil.
Osezingeni eliphezulu
2 days
Imiyalelo
1
1
Forge to rod
Forge to rod
Heat the bar to a cherry-red heat and no hotter, and draw it out round on the anvil to a rod a little thicker than the drawplate's largest hole.
Izinto zokwakha zalesi sinyathelo:
Induku yensimbi ye-bearing (52100)1 kg
Amalahle1 as requiredAmathuluzi adingekayo:
Iziko lomkhandi wensimbi
Insimbi Yokukhandela
Isando esinekhanda elimise okwesikhonkwane
Udlawu lomkhandi wensimbi
Amagilavu okushisela
Izibuko zokuphepha2
2
Anneal
Anneal
In the oven, hold it at 793 °C (1460 °F) for 30 minutes, cool in the oven no faster than 500 °C an hour to 682 °C (1260 °F), then cool in air.
Amathuluzi adingekayo:
Uhhavini lokwelapha ngokushisa
I-thermocouple enesibonisiUdlawu lomkhandi wensimbiAmagilavu okushisela3
3
Clean and taper
Clean and taper
Brush off all the scale, then file a long taper on the first 3 cm so it passes the first hole.
Amathuluzi adingekayo:
Isethi yamabhulashi ocingo
Iqoqo Lamafayela
Isibambo Sebhentshi4
4
Wax and draw
Wax and draw
Clamp the drawplate in the vise. Wax the rod, push the taper through the first hole it does not slip through, and pull straight out with the draw tongs in one steady pull.
Izinto zokwakha zalesi sinyathelo:
Isibabule Sezinyosi20 gAmathuluzi adingekayo:
Ipuleti lokudonsa ucingo lensimbi
Udlawu lokudonsaIsibambo Sebhentshi
Amagilavu Omsebenzi Esikhumba5
5
Anneal every two holes
Anneal every two holes
Draw through each next hole without skipping. After every two holes, coil the wire and anneal it again: hold it at 793 °C (1460 °F) for 30 minutes, cool in the oven no faster than 500 °C an hour to 682 °C (1260 °F), then cool in air.
Izinto zokwakha zalesi sinyathelo:
Isibabule Sezinyosi1 ucezuAmathuluzi adingekayo:
Ipuleti lokudonsa ucingo lensimbiUdlawu lokudonsaUhhavini lokwelapha ngokushisaI-thermocouple enesibonisi6
6
Finish soft
Finish soft
Stop at the diameter your balls need, checked with the caliper, and give the coil a last anneal so it is soft for heading.
Amathuluzi adingekayo:
I-Caliper Yedijithali Yamayintshi Ayi-6Uhhavini lokwelapha ngokushisaI-thermocouple enesibonisi7
7
Troubleshooting
Troubleshooting
Bearing steel wire troubleshooting.
Flow
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Izinto
3- Isibambeli
- 1 as requiredIsibambeli
- 1 ucezuIsibambeli
Amathuluzi Adingekayo
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