Foredom H53 User Manual

IMPORTANT INSTRUCTIONS

Foredom®Handpieces H.53, H.52, H.52D,and H.52SJ

Please read instructions before
attaching this handpiece.

Keep a 2.35mm (3/32

″) shank in
thehandpiece at all times during
operation and storage.

Repair Service Factory repairs are done
promptly and at reasonable cost. If you wish, you can send your equipment directly to the
factory marked “Attention: Service Department”.
Be sure to give your street address. The equipment should be accompanied by a brief note
describing the problem with the equipment. Estimates will be made upon request.

For More Information on Foredom machines, handpieces, or accessories, contact your
local dealer. When no local dealer is available, visit our website at www.foredom.com
You can write to us at: The Foredom Electric Company, 16 Stony Hill Road, Bethel, CT
USA 06801 or call [phone].

Always wear proper eye protection while using this handpiece.

Form 1284 n 5/07 Printed in USA

Collet Replacement & Collet
Gripping Pressure Adjustment
For Foredom®H.52, H.53,
H.52D, and H.52SJ Handpieces

Pliers and 3/8″
spanner wrenches required.

(

10mm)

and 3/4″

(

15mm)

Adjust the Shaft and Sheath

Note: This illustration does not apply

to slip joint connections.

I

t is important to check the sheath and shaft tip and
properly adjust them before attaching this handpiece
t

o your Foredom flex shaft tool. The tip of the flexible
shaft should extend 3/4
t

he sheath. This adjustment is made by loosening the set screw in the motor connector and moving
t

he sheath in or out while the motor and shaft/sheath are hanging fully extended or laying on a flat sur-

″ (19mm) beyond the end of

face. When the shaft is adjusted correctly, tighten the set screw in the motor connector.

s

ure your power tool is unplugged during any maintenance procedure.

I

MPORTANT!

Always make

Attach Handpiece
H.52 or H.52D to Flexible Shaft

The handpiece is easy to remove from
the flexible shaft. To

remove, simply

pull the handpiece off the shaft and
sheath with a firm grip. To

re-attach, look into the back end of the handpiece for the keyway. Be

sure that the key tip of the flexible shaft is properly lined up with the keyway slot in the back end
of the handpiece and push it on. If it is not in line, turn the shaft tip or the handpiece to the
correct position. The H.52SJ has a ‘slip joint’ connection for use with European style machines.

Rapid Accessory Changing

These quick change handpieces have a unique
push/pull collet chuck release mechanism. Wait for
the motor, flexible shaft and accessor

y to come to
a full stop before opening the chuck. Then, pull the outer grip
forward with one hand while holding the back of the handpiece
with the other (see Figure 1). Remove the accessory and insert
the shank of the new one at least 1

″ (25mm) into the chuck. Pull

the grip all the way back until the chuck snaps closed (see Figure 2).

Figure 1 Open

Figure 2 Closed

Maintenance and Lubrication

Handpieces H.52, and H.52SJ do not require any lubrication. Putting oil or grease into the
front or back of these handpieces will damage their prelubricated ball bearings.

Lubrication of Duplex Connection on the H.52D Handpiece

Apply 2 Drops of oil in oil hole on rear of duplex connection after approximately every 20
hours of use.

Collet Replacement & Collet Gripping Pressure Adjustment

The collet gripping pressure is preset at the factory during assembly. After a period of use it may be
necessary to readjust the collet chuck nut to compensate for normal collet wear which reduces the
gripping pressure or when the collet is replaced. Follow the instructions below when replacing or
adjusting collet gripping pressure.

1. Remove handpiece from the flexible shaft before
disassembly and remove bur or accessor

y from the collet.

2. Unthread the nose cone using a 3/4″(15mm)
spanner wrench while holding the handpiece at the front
knurled section. Turn counter-clockwise to unthread.

3. Pull chuck nut for

ward while holding front sleeve and
rear knurl and then push back to expose the chuck nut
and front bearing.

4. Remove the chuck nut by holding the bearing
retaining nut with a 3/8

″(10mm) spanner wrench and
unthreading counterclockwise the chuck nut with a
spanner wrench (7mm) or pair of pliers on its flats.
This exposes the collet for cleaning or replacement.

Nose
Cone

Chuck
Nut

Adjusting
Nut

Replacement Part Description Part No.

2.35mm (3/32″) Front Collet HP5262
Chuck Nut
Nose Cone
Adjusting Nut HP5257
Catch Spring HP43
Catch Ball HP48

Front Bearing

Bearing
Retaining Nut

5. Gripping pressure is adjusted by moving the adjusting nut down (to increase pressure) or up
(to reduce pressure) on the threaded spindle/collet holder. Make the adjustment in small increments
(about one half turn of the nut). A half turn may be sufficient to increase or decrease gripping pressure.

Rear Knurl

Push Back

HP5266
HP5270

Bearing

6. Tighten the chuck nut down so that it touches the adjusting nut
while holding the bearing retaining nut with the 3/8

″ wrench.

7. Pull sleeve forward over bearing and thread the nose cone back
on and insert a 2.35mm or 3/32

″ shank accessory (1/8″ in No. 53
handpiece) into the collet with sleeve pulled forward (open). Now
close the collet. It should require moderate force, and there should
be a slight “snap” as the collet locks closed.

8. If the gripping pressure is too much or too little, remove nose
cone and repeat Steps 3-7. (The chuck nut does not need to be
removed to reduce or increase gripping pressure. Unthread the nut
one or two turns, move adjusting nut up or down a half turn
and re-tighten the chuck nut.)

Foredom®warrants its product to be free of defects in material or workmanship for a period of 90 days after purchase.
During the warranty period, the defective product will be repaired or replaced without charge or, at our option, the pur­chase price will be refunded . This warr anty does not cover damage caused in transit or by accident, misuse, or ordinar y wear.
The duplex connection is particularly susceptible to damage and is not covered by warranty
are shipped with installation instructions. ALL IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO
WARRANTIES OF FITNESS AND MERCHANTABILITY, ARE HEREBY LIMITED IN DURATION TO A PERIOD ENDING 90 DAYS
FROM DATE OF PURCHASE, AND WE WILL NOT BE LIABLE OR RESPONSIBLE FOR ANY SPECIAL OR CONSEQUENTIAL
DAMAGES. Repair or replacement will be made at our option if the product is returned post-paid to:

All warranty repairs must be done at the factory at the address above. We will not pay any shipping or transportation charges.
This warranty covers the original purchaser of the product only
warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.

LIMITED WARRANTY

The Foredom Electric Company

16 Stony Hill Road, Bethel CT 06801

. Some states do not allow limitations on how long an implied

Retaining
Nut

Adjusting
Nut

Chuck Nut

Nose
Cone

Collet

Chuck
Nut

. Replacement duplex springs

3/8″
Spanner Wrench

Adjusting
Nut

Threaded
Spindle
Collet
Holder

Bearing

3/8″
Spanner
Wrench