Directions for attaching accessories to handpieces
vary according to the type of handpiece being
used. Locate the model number of your Foredom
handpiece from the photos on page 8.
Always wait for the motor, flexible shaft and
accessory to come to a complete stop before
changing an accessory. (Handpieces listed in
brackets are for use with Series SRH models
only.) Attach the accessory according to
the following:
Collet Types –
8, 8D, 25, (25H), 28, 28SJ, (28H), 43T, 44T,
44TSJ, & (44HT) Handpieces:
A collet is an interchangeable slotted cylinder
inserted tightly into the interior of a handpiece to
hold a bur or other rotary accessory. The diameter
size of the collet must match the diameter of the
accessory’s shank.
General Directions: Be sure to use the correct
shank size. The correct shank will fit snugly inside
the collet. Caution: Never tighten a collet unless
an accessory has been inserted. Tightening an
empty collet or inserting an accessory which is
too small or too large may damage the collet.
8, 8D, and 8SJ Handpieces:
To change a collet: slide back the chuck guard and
use one wrench to hold the spindle and the other
to unscrew the chuck nut by turning counterclock-
wise. Remove chuck nut to expose collet and pull
collet out of handpiece shaft. Slip new collet in
place and tighten chuck nut with wrenches.
To insert accessory: insert shank as far as
possible into the collet. Tighten chuck nut with
wrenches. Test for a secure hold by pulling on
accessory. Remove wrenches.
To release an accessory: follow the same steps.
Accessories can be released when chuck nut is
loosened. If accessory does not run true, loosen
chuck nut, rotate accessory, and retighten.
25, (25H), 28, 28SJ, (28H), 43T, 44T, 44TSJ
& (44HT) Handpieces:
To change a collet: 1. Insert pin provided into
the pilot hole and through the spindle hole (turn
spindle to align holes). Apply wrench and unscrew
chuck nut by turning counterclockwise.
2. Remove chuck nut to expose collet.
3. Pull collet out of
handpiece spindle.
4. Slip new collet in
place and screw on
chuck nut.
5. Remove pin.
25, (25H), 28, 28SJ, (28H), 43T, 44T, (44HT),
and 44TSJ Collet Handpieces:
To insert or change accessories: insert pin
provided into the pilot hole and through the
spindle hole (turn spindle to align holes). Loosen
chuck nut slightly with wrench provided. Insert
shank of accessory into collet. Tighten chuck nut
with wrench, keeping pin in pilot hole. Test for a
secure hold by pulling on accessory. Remove pin.
Chuck Type –
30
®
, 30SJ, and (30H)
Handpieces:
These hand-
pieces have a geared 3-jaw
#0 chuck. Open chuck
jaws as far as necessary with key provided. Insert
shank of accessory fully into the chuck. Tighten
jaws with chuck key until accessory is secure and
centered. If accessory does not run true, reopen
jaws, rotate accessory and retighten. To release
accessory, simply reopen chuck jaws with key and
pull out accessory.
Hammer Type – 15, 15D, & 15SJ Handpieces:
These handpieces have a threaded spindle. Thread
anvil or stylus into threaded spindle as far as it will
go with clockwise motion. Insert pin provided into
cross hole in anvil or stylus. Tighten and remove
pin. To release accessory, insert pin into the
cross hole and unthread. Use this handpiece and
threaded accessories in forward rotation only.
Quick Change Type –
10, 10D, 18, 18D, 18SJ, 20, 20D and 20SJ,
Handpieces:
Keep an accessory in these handpieces at all
times, during both operation and storage, or
damage to the collet and handpiece may result.
These handpieces accept only 2.35mm (3/32
″
)
shank accessories.
continued
Attaching Accessories to Handpieces
9
Collet
Accessory
Part No.
Size
Shank Size
HPL4-3233 3/32
″
g
1/16
″
HPL4-3234 1/8
″
g
1/16
″
HPL4-3235 3mm
g
3/32
″
HPL4-3236
1/8
″
g
3/32
″
HPL4-3237 3mm
g
1.6mm
Collet Adapters for 8, 8D, 25, (25H), 28, 28SJ,
(28H), 35, 35SJ, 43T, 44T, 44TSJ, & (44HT)
Handpieces: let you ‘step down’ to a smaller shank
size accessory.
Collet Adapter
