Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Boring Bar: Driven Between Centres, with a Set-Screw Cutter (Yates, 1922)
A home-made boring bar for holes too long for an ordinary boring tool, which would spring. A short, stiff bar runs between the lathe centres, driven by a dog, and carries a hardened tool-steel cutter locked in a cross-hole by a set screw. The work is bolted to the lathe carriage and fed past the turning cutter.
Result: a boring bar, plus the small short-cut bar of Fig. 110.
Source: R. F. Yates, Lathe Work for Beginners (1922), pp. 134-136. Unknown: bar diameter and set-screw size. Picture: Figs. 110-111 of the book.
Hagati
Unknown
Amabwiriza
1
1
Turn the bar
Turn the bar
Turn a bar no longer than the job needs; the shorter it is, the less it twists under the cut. Drill both ends for the lathe centres. For short cuts, the small bar of Fig. 110 is 4 to 6 inches long with a round shank and a squared end. Ours: mild steel round bar. Not given: the diameter.
Ibikoresho by'iyi ntambwe:
Umurongo uziguye w'icyuma cyoroheje1 boring barIbikoresho bikenewe:
Imashini yo guhinguza icyuma
Ingano zitazwi2
2
Fit the cutter and set screw
Fit the cutter and set screw
Drill a cross-hole through the bar for the cutter and drill and tap a hole into it for a set screw that locks the cutter. Make the cutter of tool steel, grind its point with proper clearance, and harden it.
Ibikoresho by'iyi ntambwe:
Inkoni ya kare y'icyuma cy'ibikoresho1 cutter
Icyuma kitazwi1 set screwIbikoresho bikenewe:
Icyuma Cyivumbura Gihagaze
Agakoresho ko gukata imizingo y'ibyuma
Ibuye ryo gutyaza ry'uruziga
Itanura ryo gutunganya hakoreshejwe ubushyuhe
Indobo yo gukonjesha3
3
Bore with it
Bore with it
Bolt the work down to the lathe carriage carefully and securely; carriage bolts of several sizes are handy for this. Drive the bar between centres with a dog and feed the carriage. Run very slowly when boring cast iron, and keep the feed light so the bar does not spring.
Ibikoresho bikenewe:
Imashini yo guhinguza icyuma
Bulo ifite umutwe uzengurutseIbikoresho
3- 1 boring barUmwanya
- Umwanya
- 1 set screwUmwanya
Ibikoresho bikenewe
8- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Ibikoresho by'Ibishushanyo Bifitanye Isano
10% igabana
Mild Steel Bar Stock Forged from an Ingot
na Forge
Kigezweho
43
0
0
0
5
0
10% igabana
Tool-Steel Bar: Crucible Steel Drawn Out at a Cherry-Red Heat
na Forge
Umucuzi
32
0
0
0
5
0
10% igabana
Lathe Cutting Tool: Ground to the Clearance and Slope for Each Metal (Machinery's Handbook, 1924)
na Forge
Ibikoresho by'Ubucuzi
7
0
0
0
1
0
Iki gishushanyo gikora
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