Machine Shop Primer: An Introduction to Machine Tools and Shop Appliances ... by Fred Herbert Colvin Frank Arthur Stanley

Author:Fred Herbert Colvin , Frank Arthur Stanley
Language: eng
Format: epub
Publisher: Hill Publishing Co.
Published: 1910-03-25T05:00:00+00:00

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Cup— (Fig. 236). Cylinder— (Fig. 237). Disk— (Fig. 238).

Ring—(Fig- 239).

Saucer or Dish—(Fig. 240).

Grinding Wheel Dresser —(Fig. 241). A tool consisting of pointed or corrugated disks of hard metal which really break or pry off small particles of the grinding wheel when held against its rapidly revolving surface.

Gripe —Local name for machine clamp.

Ground joint —^A joint finished by grinding the two parts together with emery and oil or by other abrasives.

Ground —A connection between the electric circuit and the earth.

Gudgeon —^A local name for a trunnion or bearing which projects from a piece as a cannon.

Guide Liner —(Fig. 242). A tool fgr use in locomotive work for lining up guides and cross heads.

H

Half Nut —^A nut which is split lengthwise. Sometimes half is used and rides on screw, in others both halves clamp around screw as in the half nut of a lathe carriage.

HAMMERS

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Hammer, Machinists' —(Figs. 243-247). The common types of machinists' hammers are the ball peen, straight peen, and cross peen, as shown. The so-called engineer's and the riveting hammers have cross peens. Ball Peen—(Fig. 243). Cross Peen— (Fig. 244). Engineers'— (Fig. 245). Riveting— (Fig. 246). Straight Peen— (Fig. 247).

Bumping or Homing Hammer —^A hammer used for closing seams on large cans, buckets, etc.

Drop Hammer —(Fig. 248). A machine in which a hammer head or "monkey" or **drop" is raised by hand or power and falls by gravity. Sometimes raised by a board attached to top of hammer head and running between pulleys. Others use a belt.

Helve Hammer —(Fig. 249). A power hammer in which there is an arm pivoted in the center and power applied at the back end while the hammer is at the other and strikes the work on an anvil.

Lever Trip Hammer.

no MACHINE SHOP PRIMER.

•

Spring Hammer —(Fig. 250). A comparatively small hammer ^ving

a great variety in the force of blow. This is controlled by pressure

of foot on lever. Steam Hammer —(Fig. 251). A power hammer in which the hammer

head is forced down on the work by steam in a cylinder. Hand Wheels, Clutched —A hand wheel connected to shaft by a clutch

which can be thrown out by a knob or otherwise so that accidental

movement of wheel will not disturb setting. Used on milling

machines and similar places. Hanger, Drop —(Fig. 252). A shaft hanger to be fastened to ceiling

with bearing held in lower end. Hanger, Post —(Fig. 253). A shafting hanger for fastening to posts

or other vertical structures. Hardie —(Fig. 254). A blacksmith's cutting chisel which fits a hole

in the anvil and forms the lower tool in cutting off work. Harp —A local name given to the apron or swivel of a planer tool block. Harveyizing —The surface hardening of steel armor plates by using

a bed of charcoal over the work and then gas turned on so it will

soak in from the top. Not adapted to small work. Hindley Worm —See Worm. Hoist, Chain —A hoist with chain passing through pulley block used

for hoisting. - ^

Holder, Drill —^A device for holding drill stationary while work is

revolved by lathe chuck, or face place.

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