Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
English
Wooden Marking Gauge with a Wedge-Locked Headstock
A marking gauge scribes a line parallel to an edge: a square beam slides through a headstock, a steel pin near the end of the beam scratches the line, and a wedge locks the headstock at the distance you set. Make it from a hardwood strip and a filed steel pin.
The picture: a small walnut marking gauge; this one locks with a brass screw and marks with a blade, where ours uses a wedge and a pin.
Hagati
An afternoon
Amabwiriza
1
1
Beam and headstock
Beam and headstock
Plane a square beam about 20 mm thick and 200 mm long. Cut a block for the headstock and chop a square hole through it so the beam slides snugly.
Ibikoresho by'iyi ntambwe:
Agace k'igiti gikomeye2 ibiceIbikoresho bikenewe:
Umucumita w'Intoki
Ikoresho cyo gusiga ibiti
Igipimo cy'inguni ya dogere mirongo cyenda
Ibikoresho by'amasuka y'igiti2
2
Wedge slot
Wedge slot
Chop a tapered slot across the headstock that meets the beam hole, and plane a matching wedge about 1 in 12 (our taper).
Ibikoresho bikenewe:
Ibikoresho by'amasuka y'igitiIkoresho cyo gusiga ibiti3
3
The pin
The pin
Drill a small hole near the end of the beam, drive in a short length of steel rod, and file its tip to a fine point standing about 1 mm out.
Ibikoresho by'iyi ntambwe:
Umurongo Uzengurutse w'Icyuma Cyoroshye0.05 mIbikoresho bikenewe:
Igikoresho cyo gutobora gikoreshwa n'intoki
Umucumita w'Ibyuma
Ikariso ry'Icyuma4
4
Check and oil
Check and oil
Set it, run it along a straight edge, and check that the line is parallel at both ends. Oil the wood.
Ibikoresho by'iyi ntambwe:
Amavuta y'Ubudodo0.02 litiroIbikoresho bikenewe:
Igipimo cy'inguni ya dogere mirongo cyenda5
5
Why the wedge holds
Why the wedge holds
Gupakira ikaye ya Jupyter…
Ibikoresho
3- 2 ibiceUmwanya
- Umwanya
- 0.02 litiroUmwanya
Ibikoresho bikenewe
7- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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