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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.
高级
2 days
说明
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.
此步骤所需材料：
轴承钢棒（52100）1 公斤
木炭1 as required所需工具：
铁匠炉
铁砧
横向楔头锤
铁匠钳
电焊手套
安全眼镜2
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.
所需工具：
热处理炉
带读数的热电偶铁匠钳电焊手套3
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.
所需工具：
钢丝刷套装
锉刀套装
台虎钳4
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.
此步骤所需材料：
蜂蜡20 克所需工具：
钢制拉丝板
拉丝钳台虎钳
皮革工作手套5
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.
此步骤所需材料：
蜂蜡1 个所需工具：
钢制拉丝板拉丝钳热处理炉带读数的热电偶6
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.
所需工具：
6 英寸数显卡尺热处理炉带读数的热电偶7
7
Troubleshooting
Troubleshooting
Bearing steel wire troubleshooting.
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