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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.
Abantado
Several days
Mga Tagubilin
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).
Mga materyales para sa hakbang na ito:
Sheet na asero para sa talim ng lagari1 pirasoMga kailangang kasangkapan:
Gunting sa plaka
Mga guwantes sa paghihinang
Salaming pangkaligtasan2
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.
Mga kailangang kasangkapan:
Pisaang pambutas ng ngipin ng lagariMga guwantes sa paghihinangSalaming pangkaligtasan3
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.
Mga kailangang kasangkapan:
Pandayan ng panday
Sipit ng panday
Langis sa paggupit
Taba ng Hayop (Sebo)
Dagta ng pino (rosin)
Pagkit ng BubuyogMga guwantes sa paghihinangSalaming pangkaligtasan4
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).
Mga kailangang kasangkapan:
Pinainit na die na pampatagMga guwantes sa paghihinangSalaming pangkaligtasan5
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.
Mga kailangang kasangkapan:
Batong panghasang gulongMga guwantes sa paghihinangSalaming pangkaligtasan6
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.
Mga kailangang kasangkapan:
Panlihis ng ngipin ng lagari
Kikil sa ngipin ng lagari7
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).
Mga materyales para sa hakbang na ito:
Tira ng matigas na kahoy2 piraso
Bilog na Bara ng Malambot na Asero0.3 mMga kailangang kasangkapan:
Liyukang de-poste
Barenang de-kamay8
8
Plate for a 6-foot cross-cut
Plate for a 6-foot cross-cut
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Mga Kinakailangang Kasangkapan
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