Clarke CHT879 User manual

USER INSTRUCTIONS
ORIGINAL INSTRUCTIONS GC0918 ISS 1
LONG/SHORT ARM THREADED NUT
RIVETERS
MODEL NO: CHT879 & CHT880

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]
INTRODUCTION
Thank you for purchasing this CLARKE Riveter. Suitable for rivet nuts in
aluminium, steel and stainless steel. The short arm version (CHT879) is ideal for
access in restricted spaces while the long arm version (CHT880) has an
adjustable stroke scale for improved accuracy.
Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you and you can look forward to your purchase
giving you long and satisfactory service.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission. This guarantee does not effect your
statutory rights.
STORING THE MANDRELS
Choose the rivet nut to be used for the job. The riveter is supplied with a
choice of different size mandrels to suit different rivets and a spanner for
changing mandrels.
The CHT879 model is supplied with M3, M4, M5, M6 & M8 mandrels.
The CHT880 model is supplied with M3, M4, M5, M6, M8, M10 & M12 mandrels.
• Always store the unused mandrels in the plastic cases provided complete
with their respective retaining nut.
• The mandrel and nut sizes are marked on each component.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]
FITTING THE MANDREL
1. Remove the sheath,
locking ring and washer.
2. Slide the spring-loaded
sleeve down to expose the
hex shank
3. Screw your chosen your
chosen mandrel into the
hex shank as far as possible.
4. Release the sleeve.
• The sleeve will spring back
over the lower part of the
mandrel.
5. Replace the sheath,
locking ring and washer.
6. Fit the mandrel nut, finger
tight, and tighten the locking ring.
SETTING THE STROKE
• Model CHT880 has a stroke scale
to help achieve optimum
compression of the rivet. The rivet
nut needs to shorten
approximately 6mm during
compression when using
M6,M8,M10 & M12 rivets. Smaller
rivets may require a smaller
setting.
1. Set the angle of the arms so that
the scale reads 6mm.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]
2. Screw a rivet onto the
mandrel until it is level with
the mandrel tip
3. Turn the sheath anti-
clockwise until the mandrel
nut touches the rivet.
4. Screw down the locking
ring so that it touches the
body of the rivet gun.
OPERATION
1. The hole diameter in the workpiece must be nominally larger than the
outer diameter of the rivet. Ensure the hole is perpendicular with the
surface of the workpiece components.
2. With the arms of the riveter open fully, insert the rivet nut into the hole in the
workpiece. Ensure that the riveter is perpendicular to the workpiece and
the flange of the rivet is pressed against it. Close the handles together to
compress the rivet nut.
3. Rotate the thumbwheel anticlockwise to unscrew the mandrel from the
installed rivet nut.
4. If the mandrel can not be easily removed from a rivet in this way, unscrew
the sheath leaving just the mandrel remaining in the rivet and use a rod
inserted through the hole in the mandrel to twist it anticlockwise to release
it from the rivet.
CHANGING MANDRELS
1. Use the spanner if necessary, to remove the mandrel nut, followed by the
sheath and its washer.
2. Slide the spring-loaded sleeve down to expose the hex shank so that the
mandrel can now be unscrewed from it.
3. If necessary, use a suitable rod passed through the hole in the mandrel to
undo it (anticlockwise). Hold the hex shank with a suitable spanner.
4. Replace with the new mandrel while the sleeve is held back. When the
mandrel is fully home, release the sleeve which will spring up and stop the
mandrel from turning.
5. Refit the sheath, washer & mandrel nut, ensure they are all tight before use.