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Hand Saw: Plate, Teeth, Temper and Handle
Hand saws were made like this in the saw works of the 1880s. Steel plate is sheared to the outline of the blade and the teeth are punched in a press. The toothed plate is heated to a light cherry red and plunged into a bath of oil, tallow, rosin and beeswax, which leaves it as brittle as glass; it is then flattened between heated dies until it reaches a blue, the colour of spring temper. After smithing and grinding, the teeth are set, bent alternately left and right, and filed sharp, and a wooden handle is riveted on. Today the plate is laser cut and the teeth are ground and flame hardened.
高级
Factory process (1880s)
说明
1
1
Cut the plate
Cut the plate
Shear the steel plate to the outline of the blade.
此步骤所需材料：
锯片用钢板1 个所需工具：
板材剪2
2
Punch the teeth
Punch the teeth
Punch the teeth along the edge with a shaped die in a press.
所需工具：
锯齿冲压机3
3
Harden
Harden
Heat the toothed plate to a light cherry red and plunge it into a bath of oil, tallow, rosin and beeswax. It comes out as brittle as glass and buckled.
此步骤所需材料：
动物脂（板油）1 公斤
松香0.5 公斤
蜂蜡0.5 公斤4
4
Flatten and temper
Flatten and temper
Clean off the scale and grease and press the plate flat between heated dies until it turns blue, the spring temper. Test it by bending: a good blade springs back straight.
所需工具：
加热整平模5
5
Smith and grind
Smith and grind
Hammer out any remaining unevenness on a stake, then grind the blade to its gauge on a grindstone.
所需工具：
旋转磨石6
6
Set and sharpen
Set and sharpen
Set the teeth alternately left and right with a saw set, joint the points level with a file, and file each tooth sharp with a triangular file.
所需工具：
锯齿拨料器
金属锉7
7
Fit the handle
Fit the handle
Shape a handle from beech and fix the blade in it with rivets.
此步骤所需材料：
山毛榉锯材1 个
锯柄铆钉3 个
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