. Mining and Scientific Press . PIN III W V PINION (IN PLANER FOR CUTTING BEST-WAT October 22, 1921 MINING AND S( PR1 SS :.T I handled i the furnace as recorded by a pyrometer, andthe Brinell hardness aumbi operation shown in Pig. I is the drilling of the head of the pin. This is a mplished by strapping the puis verticall) to the side of the table of the radial drill. Fig. 6. i ppeb ti mbler us 25-in. shai i where two pins can be conven-iently Becured by one strap. Other Shop Work. Thereare various heavy gears andpinions in the equipmentdredges and a Bhop operation ona coarse-pi
. Mining and Scientific Press . PIN III W V PINION (IN PLANER FOR CUTTING BEST-WAT October 22, 1921 MINING AND S( PR1 SS :.T I handled i the furnace as recorded by a pyrometer, andthe Brinell hardness aumbi operation shown in Pig. I is the drilling of the head of the pin. This is a mplished by strapping the puis verticall) to the side of the table of the radial drill. Fig. 6. i ppeb ti mbler us 25-in. shai i where two pins can be conven-iently Becured by one strap. Other Shop Work. Thereare various heavy gears andpinions in the equipmentdredges and a Bhop operation ona coarse-pitch pinion is shownl y Pig. 5. This represents themethod of cutting key-ways inthe neck of the pinion. Thework is blocked-up on the platenof the planer and secured to tin-face of an angle-iron by siat eacli side as indicated. Theback end of tIn- key-way ofcourse has been drilled out in aprevious operation to allow theplaner-tool sufficient space torun out in its cut. In this , two key-ways are cut 90°apart on th. hub. The broad nose, flat-endedgripping tongs suspended fromthe chain-hoist provide a handy means for picking up work of this character for placingin position for machining or for removing from theplaner when finished. The Upper Tumbler. The buckets are operated overan upper tumbler which, in one form, is shown in Fig. some designs the tumbler and sh
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