Foredom Duplex Spring Connection User Manual
FOREDOM
®
Duplex Spring Connection
9. Lubrication:
• Apply a light film of Foredom Grease to
the new duplex spring.
• Apply one drop of Foredom Oil to
the axle.
10. Reassemble by reversing procedures
in steps 2 through 5 on opposite page.
11. Attach handpiece to flexible shaft and
sheath being sure to align shaft tip with
slot in handpiece shaft connector. Run
handpiece at low speed for one or two
minutes to spread out grease and oil.
Part No. Description
HP76 Duplex Inner Spring
HP75 Duplex Axle
HP73 (H.8D, H.9D, H.15D, H.18D,
H.52D, H.55D, H.56D)
HP73-1 (H.7AD), or
HP74 (H.7D, H.10D, H.20D)
HP47 Washer
HP10531 Retaining Ring
HP46 Slotted Shaft Connector
HP42 Q.D. Connector
MS10005 Foredom Motor & Handpiece
Oil in hypodermic dispenser
MS10010 Foredom Motor & Handpiece
Oil in 2 oz. container
MS10006 Foredom Flexible Shaft
Grease in 1 oz. container
}
Duplex
Cover
Assembly
Caution: To avoid frequent breakage or
kinking of springs, Do Not subject this
connection to unnecessarily sharp bends
of more than a 45° angle. Do Not exert
excessive pressure on work, but let the
speed of the tool accomplish the
desired result.
Avoid jamming of bur, stone, drill, or other
cutting tool in a cavity, slot, groove, or
hole in workpiece.
The duplex spring is a replacement
part that is not covered by the
handpiece warranty.
FOREDOM
The Foredom Electric Company
Bethel, CT USA 06801
www.foredom.com
orm 1253 n 3/10 Printed in USA
F
®
FOREDOM
®
Duplex Spring Connection
Duplex Springs provide extra flexibility to a
handpiece when more precise control for
delicate work is required. The spring drive is
made of special steel, double wound, tubular
construction with a protective flexible
spring cover.
Duplex Springs are subject to breakage and
are not covered by warranty.
that only experienced users of flex shaft tools
and/or those whose work demands added
flexibility consider this style handpiece.
The duplex spring component requires
periodic lubrication.
We recommend
®
clockwise.
Handpiece Shaft
or Spindle
clockwise. This
″ Pin
1/16
4. Remove Retaining Ring from axle with needle
nose pliers. Remove Washer.
5. Unscrew Duplex Cover from handpiece using
two pairs of pliers at points E and D, turning
counter
clockwise
Duplex Spring.
6. To remove the damaged spring:
Inspect Handpiece Shaft at point F (or point D for
the H.18D handpiece only). Depending on your
handpiece model:
Follow this if you have a crosshole (Handpieces
H.7D, H.15D, H.9D, and H.18D): Insert a 1/16″ pin
through crosshole in spindle to hold it. Take a pair
of pliers to hold damaged spring, and pull while
turning counter
. This exposes the damaged
clockwise to remove it.
Handpiece Housing Duplex Spring Duplex Axle
D F H G Hole for
FOREDOM
Duplex Spring Connection
Directions for Replacing Duplex Springs:
You will need: 2 pair of pliers, 1/16″ diameter
pin, and a 3/16″ open end wrench or needle
nose pliers.
1. Remove handpiece from sheath. This can be
done with a sharp pull.
2. Unscrew the QD Sheath Connector from
Duplex Cover Assembly using two pairs of pliers
at points A and B, turning counter
exposes the Slotted Shaft Connector.
3. Insert a 1/16″ pin through the hole in the
Duplex Axle. Holding pin, unscrew Slotted Shaft
connector from axle, using a pair of pliers at
point C turning counter
Duplex Cover Washer
Ring
E A C B
Follow this if you have wrench flats (Handpiece
H.10D): Using a 4.5mm(3/16″) open end wrench to
hold spindle, take a pair of pliers to hold damaged
spring, and pull while turning counter
remove it.
Follow this if you do not have a crosshole or
wrench flat (Handpiece H.7AD, H.8D, H.52D,
H.55D, and H.56D): Hold spindle on point F using a
narrow pair of pliers above spring. With a second
pair of pliers hold damaged spring, and pull while
turning
7. To remove axle from damaged spring:
Insert a 1/16″ pin through crosshole in axle.
Remove spring as in Step 6 using a pair of pliers.
clockwise to remove it.
counter
clockwise to
Slotted Shaft
Connector
8. To install new spring:
Put the new spring on the duplex axle first by
pushing and turning it with the pliers counterclockwise.Be sure that the spring goes all the
way to the shoulder of the axle (Point G).
Holding the spindle as described in Step 6,
(depending on your model), install the spring on
the spindle by pushing and turning it with the
pliers counter
Be sure that the spring goes all the way to
the shoulder of the spindle (Point H).
ANT
T
IMPOR
Be sure to follow lubrication
instructions on reverse side.
QD Sheath Connector Retaining
clockwise.
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