Sealey AK301 - Manual (Page 2)

3.1. INTERNAL THREADS

DO NOT hold the workpiece by hand. Use
clamps or a vice (not included) to secure
the workpiece.
3.1.1. To cut an internal thread through a solid
piece of metal, drill a correctly sized hole
using a tapping drill selected from the size
chart above.
Note: an M3 threaded hole does not use an M3
drill.
3.1.2. Ensure that the hole is free from burrs,
clear of swarf and apply a smear of
suitable lubricating grease.
3.1.3. Select the correct taper tap from the set and
secure it in the tap wrench. Apply a little
grease to the tip of the tap.
3.1.4. Rest the tap in the hole and grasp the
wrench with two hands. Apply even pressure
and turn the tap clockwise until it “bites”.
Continue to twist the wrench until
resistance is felt (usually about ½ a turn)
then give it a quarter turn
anti-clockwise until a slight click is felt. This
is the swarf from the clockwise twist being
broken off.
3.1.5. Continue this action until the tap has run
almost its complete length and ensure
that a suitable lubricating grease is
applied regularly.
3.1.6. To cut a thread in a blind hole, use the
same instructions as above but be careful
not to jam the tap in the bottom of the hole.
3.2. EXTERNAL THREADS

DO NOT hold the workpiece by hand. Use
clamps or a vice (not included) to secure
the workpiece.

Provide appropriate lubrication while
cutting threads.
3.2.1. To cut an external thread on a solid bar,
select the correct die for the rod being
threaded.
Note: Whilst the size of the rod or bolt is
not too important, it must be longer than
the desired thread, and ideally 0.005” to
0.0010” undersized.
3.2.2. Insert the die into the die stock and turn the
set screw snugly into one of the recesses
on the outside surface of the die.
Note: The recess and slot pattern of dies
allows for a variety of die stocks.
3.2.3. Bevel the end of the piece to be
threaded in order to make starting easier.
3.2.4. Using the chamfered side of the die, start
the threading operation by rotating the die
on the rod clockwise until it starts leading
onto the workpiece.
3.2.5. Chips will flow into the holes provided and
should be broken by reversing the action
every ¼ to ½ a turn, depending on the
tightness encountered.
3.2.6. Continue this operation until the threads of
the desired length have been cut.
3. INSTRUCTIONS FOR USE
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
01284 757500
01284 703534 [email protected]
Sole UK Distributor, Sealey Group,
Kempson Way,
Suffolk Business Park ,
Bury St. Edmunds, Suffolk,
IP32 7AR
www.sealey.co.uk
Tap & Die Sets Issue: 2 (C) - 12/02/2014
Original Language Version © Jack Sealey Limited