The sun. [volume] (New York [N.Y.]) 1833-1916, 1899-12-24
HACK SAWS.
And Saws of Various Other Sorts That Ars
Used In Cutting Metals.

No doubt the common idea of saw would 10
Of an implement used for saving wood, and such
Is the chief use 70 which put but there are
also many saws used for saving metals. Tho
most commonly used Of these saws is what IS
called hack saw.
The hack saw is built some thing like a meat
saw;that is. the blade is held between tho bent
down ends Of a frame, 10 one end Of which Is at
tached the handle, by which. in the ordinary way,
the saw is Piled but the hack saw is smaller than
the meat saw, with far more slender frame and
a light. slender blade.
There are various styles and sizes OF hack saw
frames, including extension frames, in which can
be used. according as the frame is adjusted, saws
OF different lengths for the hack saw blade is ROT
rtveted into Its frame, but adjusted there: and
blades can be taken out or put In at will.
The blades are very narrow and very thin. and
very nne-toothed: they are made OF steel specially
hardened for the use. In the manufacture q
the blades the teeth arc set and filed By machines
with greater accuracy than that work could he
done by hand, and at much less cost Formerly
many hack saw blades were imported from Eng
ana, now there arc very few imported; the American
blades are better and far chcAper They arc
30 Inexpensive that when worn dull they are nos
The hack saw blades most commonly used are
made in various lengths ranging from slN Ia four.
teen inches: perhaps there are sold more eight
are put up in dozens n dozen OF them together
making only a slender little bundle The average
price at retail Is about 65 cents dozen.
Hhcksaws are used in many trades, \ jcUccr
would have some little hacksaws on his work
bench: hacksaws are used by machinists lock
smlths, stovemakeTs, plumbers, hrasSwOrk,rS,
foundrymcn; they are used in all trades in when
metals arc worked: and the carpenter. supposed
10 be a worker in wood alone is likely e. have
a cksaw in his kit Of tools he may want 10 saw
OIL bolt or something OF that sort and for that
In wood
How long hasksaw will last depends Of cour>"
very largely ON how much IL is used but hHrh.
saw with which seven'inch steel shaft had ~ Y
cut on still remained sh arp enough for further
use hacksaws are put TO many uses, on ind"r,
There are now made for railroad Constfu,unn
and npalr work portabc rail saws for Saving
on rhilS The old way bring 10 cut them OIL VIII
chisel and hammer. The rail is clampcd INTO
me frame IN which the saw is worked The sHw
being operated by hand power Portable ral
saws Of American invention and manuia,tUr>
are sold all over the world
Oi power driven saws for metals there 40
various kinds: these saws being put 10 man"
uses For some purposes hack saws are hn"d
up 50 that they can be power driven but the save
commonly used with power are circular ~ A.,
size, circular saws made for metals
ranging from three inches 10 sixty nchcs ~
diameter, and such saws are vaIously TEMPERED,
some harder and some softer according L. tho
use TO which they are To he put Some are Iiu
az high speed some allow speed Some are tu0llrr
and some are toothless these last being called
friction saws and there are cold saws aud hnt
saws, so,called the hot saws being used To saw
hot metal, which comes 10 the saws red hot
Such saws In one form and another, are usrd
In Me various mills IN which iron and steel arg
made into shapes, and in bridge and architectural
works and In machine shops and ioundr,es;
they arc used for saving of rails and beams and
osIs ana Tor many. other purposes