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WRENCHES STRIKING WRENCHES
• • Users and bystanders must wear safety goggles. • • Users and bystanders must wear safety goggles.
• • To avoid possible eye injury from flying objects, safety goggles
or equivalent protection conforming to ANSI Z87.1 shall be worn
and kept clean by the user and all persons in the immediate
area where any tool is being used. • • To avoid possible eye injury from flying objects, safety goggles
or equivalent p rotection conforming to ANSI Z87.1 shall be worn
and kept clean by the user and all persons in the immediate
area where any tool is being used.
• • Comfort or plastic grips on handles are not intended to give any
degree of protection against electric shock and shall not be used
on or near live electric circuits. • • Striking wrenches are special-purpose tools designed and
intended only for use with heavy-duty fasteners where shock or
impact is needed to fully tighten or loosen.
Wrenches Safety
• • Wrenches are to be used by hand only. Do not use cheater bars
or any other means of increasing leverage. The only wrenches
that can be struck with a hammer are striking wrenches.
• • Never use wrenches for prying or as a hammer.
• • Never expose any wrench to excessive heat, which may change
the hardness or microstructure and ruin the tool.
• • Wrenches are to be used to turn (tighten and loosen) fasteners.
• • Users shall apply a controlled force with a stance adjusted and
braced to prevent rapid bodily movement or a fall if sudden
release occurs.
• • Use the correct size wrench, do not use metric wrenches on
inch fasteners or inch wrenches on metric fasteners, because
the fit is not good enough.
• • Always be sure to fully seat an open-end wrench on the nut
or bolt.
• • Adjustable wrenches need to be tightly adjusted to fit the nut
with the force applied to the fixed jaw. Never use adjustable
wrenches for the initial breaking loose of a “frozen” fastener or
for final tightening.
• • Pipe wrenches are designed to turn or hold pipe; never use
a pipe wrench to bend, raise or lift a pipe. Do not use pipe
wrenches on square stock.
• • Inspect each pipe wrench or adjustable wrench before use
for worn or broken teeth, thumbscrews or jaws and discard if
deteriorated.
• • Inspect and discard bent, worn or cracked wrenches.
• • A striking tool shall always be used with the striking face
parallel to the struck face of the wrench. Glancing blows,
overstrikes and understrikes need to be avoided. No surface
of the wrench other than the struck face shall be struck.
The striking tool of the appropriate size shall have a striking
face diameter not less than 3/8" larger than the struck face
of the wrench.
• • Users shall apply a controlled force with a stance adjusted and
braced to prevent rapid bodily movement or a fall if sudden
release occurs.
• • Striking wrenches shall not be used with “cheater” pipes or
other means to extend the length of the tool.
• • Striking wrenches shall be inspected prior to each use and their
use discontinued at the first sign of bending of the shank or
chipping or cracking of the box end or struck block. Deformation
of the wrenching configuration may occur from tool usage.
• • Striking wrenches shall be inspected prior to each use and
their use discontinued at the first sign of significant wrenching
surface deterioration.
• • At the first indication of mushrooming, the struck face and
struck face chamfer of the striking wrench shall be redressed
to its original contour by the use of a hand file or whetstone.
• • Except the struck face, no area, section, or portion of the
striking wrench shall be ground, welded, treated by reheating,
or otherwise altered from the original condition as furnished by
the manufacturer.
• • Care shall be exercised to prevent the wrench from dislodging
from the fastener or nut while being impacted.
• • Wrench opening configurations shall be inspected before each
use and their use discontinued at the first sign of significant
wrenching surface deterioration.
• • Wrenches shall not be used when jaws are sprung to the point
slippage may occur.
54
ASME B107.100 – Flat Wrenches
ASME B107.59 – Striking Wrenches