Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Two-Man Crosscut Saw: Bellied Blade, Scorers and Cleaners
The two-man crosscut saw cuts a log across the grain, a handle at each end. Grimshaw (1882) describes it: the blade is twice as wide in the middle as at the ends, for stiffness and for the wear there; scorer teeth cut the fibres at both sides of the kerf, and slightly shorter cleaner teeth plough out the wood between.
The picture: two men bucking a white pine log with a crosscut saw, about the 1890s.
Hejuru
Several days
Amabwiriza
1
1
Shear the bellied plate
Shear the bellied plate
Shear rolled saw plate to the outline: straight back, toothed edge curving out so the middle is twice as wide as the ends (Grimshaw).
Ibikoresho by'iyi ntambwe:
Isahani y'icyuma cy'ubugi bw'igisatuzo1 igiceIbikoresho bikenewe:
Imikasi y'amasahani y'icyuma
Uturindantoki two gukomeza ibyuma
Amadarubindi y'umutekano2
2
Punch the teeth
Punch the teeth
Punch the teeth with shaped dies in the press: groups of scorers with a cleaner between, the cleaners a little shorter. Cut the gullets near the middle deeper than at the ends.
Ibikoresho bikenewe:
Imashini ikanda itobora amenyo y'igisatuzoUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano3
3
Harden
Harden
Heat the toothed plate evenly to a light cherry red and plunge it into a bath of oil, tallow, rosin and beeswax (Grimshaw; his oil was whale oil, ours is lard oil). It comes out as brittle as glass.
Ibikoresho bikenewe:
Uruganda rw'umucuzi
Amafashi y'umucuzi
Amavuta yo gukata
Amavuta y'Itungo
Ubukomezi bw'igiti cya pinusi
IgishasharaUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano4
4
Flatten and temper
Flatten and temper
Scour off the scale and press the plate flat between heated dies until it shows blue, the spring temper (as Grimshaw gives for handsaws).
Ibikoresho bikenewe:
Ibibumbiro bishyushye byo kuringanizaUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano5
5
Grind thin at the back
Grind thin at the back
Grind both faces, working from the back toward the teeth, until the back is two to four gauges thinner than the toothed edge, so the blade clears its kerf.
Ibikoresho bikenewe:
Ibuye ryo gutyaza ry'uruzigaUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano6
6
Set and file
Set and file
Set the scorers alternately left and right, file the scorers to points, and file the cleaners square and a little lower.
Ibikoresho bikenewe:
Igikoresho cyo guhindura amenyo y'umusumeno
Ihwa ry'amenyo y'umusumeno7
7
Handles
Handles
Turn two hardwood handles, drill them, and bolt one upright through each end of the blade with a short iron rod peened over (our fitting).
Ibikoresho by'iyi ntambwe:
Agace k'igiti gikomeye2 ibice
Umurongo Uzengurutse w'Icyuma Cyoroshye0.3 mIbikoresho bikenewe:
Umuyoboro w'inkoni
Igikoresho cyo gutobora gikoreshwa n'intoki8
8
Plate for a 6-foot cross-cut
Plate for a 6-foot cross-cut
Gupakira ikaye ya Jupyter…
Ibikoresho
3- Umwanya
- 2 ibiceUmwanya
- Umwanya
Ibikoresho bikenewe
16- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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