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UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
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UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hejuru
2 days
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Umuhini w'icyuma cya roulement (52100)1 kg
Amakara1 as requiredIbikoresho bikenewe:
Uruganda rw'umucuzi
Ingoyi
Inyundo ifite umutwe utambitse
Amafashi y'umucuzi
Uturindantoki two gukomeza ibyuma
Amadarubindi y'umutekano2
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.
Ibikoresho bikenewe:
Itanura ryo gutunganya hakoreshejwe ubushyuhe
Termokupuli ifite igaragazaAmafashi y'umucuziUturindantoki two gukomeza ibyuma3
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.
Ibikoresho bikenewe:
Ibikoresho by'uburoso bw'insinga
Amakariso Menshi
Ifatiro ry'Ameza4
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.
Ibikoresho by'iyi ntambwe:
Igishashara20 gIbikoresho bikenewe:
Urubaho rwo gukurura insinga rw'icyuma
Koleyo yo gukurura insingaIfatiro ry'Ameza
Uturindantoki tw'uruhu tw'akazi5
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.
Ibikoresho by'iyi ntambwe:
Igishashara1 igiceIbikoresho bikenewe:
Urubaho rwo gukurura insinga rw'icyumaKoleyo yo gukurura insingaItanura ryo gutunganya hakoreshejwe ubushyuheTermokupuli ifite igaragaza6
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.
Ibikoresho bikenewe:
Ikigereranyo cya Digitale cy'Amasentimetero 6Itanura ryo gutunganya hakoreshejwe ubushyuheTermokupuli ifite igaragaza7
7
Troubleshooting
Troubleshooting
Bearing steel wire troubleshooting.
Flow
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Ibikoresho
3- Umwanya
- 1 as requiredUmwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
15- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
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