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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.
高级
Several days
说明
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).
此步骤所需材料：
锯片用钢板1 个所需工具：
板材剪
电焊手套
安全眼镜2
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.
所需工具：
锯齿冲压机电焊手套安全眼镜3
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.
所需工具：
铁匠炉
铁匠钳
切削油
动物脂（板油）
松香
蜂蜡电焊手套安全眼镜4
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).
所需工具：
加热整平模电焊手套安全眼镜5
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.
所需工具：
旋转磨石电焊手套安全眼镜6
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.
所需工具：
锯齿拨料器
锯齿锉7
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).
此步骤所需材料：
硬木条2 个
低碳钢圆棒0.3 m所需工具：
弹性杆车床
手摇钻8
8
Plate for a 6-foot cross-cut
Plate for a 6-foot cross-cut
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