Gesswein Z-CNX User manual

Instruction Manual
for
Contra-Angle Head Assembly
Model: Z-CNX
#510-2250
®

Introduction
The Gesswein Power Hand Z-CNX Head Assembly is engineered and manufac-
tured to a high degree of precision and will give you many years of trouble-free
service. Backed by a limited warranty that covers wear parts for 90 days and
overall balance of parts for six months.
This Head Assembly is designed to be used with the Power Hand motors in
conjunction with Power Hand Single, Standard, Dual, Jewelers’ Micromotor,
Power Carver II, and Bright-Cutting Controllers. These controllers convert the
Alternating Current (AC) power supply to a variable Direct Current (DC) by
means of an I.C. “transistorized” automatically controlled circuit.
The Gesswein Power Hand 3 handpiece series consists of six models and
seven head assemblies with maximum operating speeds ranging from 8,000 to
55,000rpm and 0 to 117 strokes per second. All models are identified by their
names, which are engraved on the motor housings.
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3
1. Accessories
Included Accessories
A. One 3⁄32" (2.35mm) Collet (reorder #501-0100)
B. One 1⁄8" (3.2mm) Collet (reorder #501-0105)
C. One Collet Wrench (reorder #510-0180)
Optional Accessories
A. Handpiece Extension Cord (#510-1120): adds 6 feet, or almost 2 meters,
to the 1.7-meter rotary handpiece cord
B. Handpiece Cradle Rest (#510-1130): provides a safe holding place
for the rotary handpiece when not in use
C. Variable-Speed Foot Rheostat (#510-3100)
D. On/Off Foot Switch (#510-3105)
E. 3mm Collet (#501-0106)
F. Reducing Collets: 1⁄8" to 3⁄32" (#816-1501), 1⁄8" to 1⁄16" (#816-1502),
3⁄32" to 1⁄16" (#816-1503), 3mm to 3⁄32" (#816-1504), 3mm to 1⁄16" (#816-1505)
G. Chuck Joint Wrench (#510-0179)
2. Parts Nomenclature
1. Collet 5. Motor Case
2. Gear Housing 6. Motor Cover
3. Collet Release Ring 7. Strain Relief
4. Motor Connecting Ring 8. Electric Cord with 3-pin plug
Fig. 1
1
2
34567
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Z-CNX Parts List
When ordering spare parts, always specify part# (or item# if applicable)
and description.
Part# Item# Description
KU-241 8960289 Name Plate
JR21-110 8960266 Cap
GA8-220 8960076 Retainer
JR21-250 8960267 Set Ring
JR21-209 8960268 Roller
JR21-109 8960269 Roller Shaft
KB-205 8960270 Coil Spring
JR21-108A 8960271 Ball Bearing Case
YSP21-102 8960272 Pan Head Screw
JR21-113 8960264 Lock Nut
JS21-112 8960290 Housing
JR21-118 8960293 Coil Spring Cover
KB-230 8960079 Coil Spring
JA15-300 8960080 Lock Ring
JR21-204A 8960284 Coupler
SB3 8960082 Stainless Steel Ball
JR21-114 8960274 Slip Protection Grip
JS21-150 8960285 Sub Drive Shaft Complete, 3⁄32"
JS21-151 8960286 Sub Drive Shaft Complete, 3mm
JS21-152 8960287 Sub Drive Shaft Complete, 1⁄8"
JR21-103 8960256 Flange Screw
KB-204 8960257 Coil Spring
KC-081S 8960258 C-Ring
KW-100A 8960259 Wave Washer
1680ZZ 5100377 Ball Bearing
JR21-106 8960260 Bearing Spacer
JS21-102 8960288 Sub Drive Shaft
JR21-107 8960262 Dust Seal A
KS-135 8960263 Spacer
KS-061 8960253 Spacer
JR21-104 8960254 Dust Collar A
JR21-105A 8960255 Dust Collar B
KC-064 8960056 C-Ring
KP-036B 5010100 Collet, 3⁄32" (2.35mm)
KP-032B 5010106 Collet, 3mm
KP-033B 5010105 Collet, 1⁄8" (3.175mm)
JS21-200 8960291 Drive Shaft Complete
JS21-120A 8960292 Drive Shaft
JR21-122B 8960277 Dust Collar
KS-162 8960279 Spacer
JR21-126 8960280 Bearing Spacer B
KB-096 8960281 Coil Spring
KS-114A 8960282 Spacer
KB-044 8960067 Coil Spring
GA78-106A 5100151 Nylon Coupler (Joint)
KC-073 8960068 C-Ring
KP-615A 5100180 CHUCK WRENCH
KW-082 8960141 WAVE WASHER
JR21-123 8960278 DUST PROOF COLLAR

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3. General Description of Use
Tool Changing
The Gesswein Power Hand Angle Rotary
Handpiece uses a quick-tool-release mech-
anism that allows for rapid tool changes. To
operate, turn the Collet Release Ring coun-
terclockwise toward the arrow pointing to the
“R” or release position (see fig. 2). When in
the full “R” position, the Collet Release Ring
will make a click sound; the collet is then fully
open and ready to accept a tool.
To secure the tool, turn the Collet Release
Ring toward the “S” or secure position.
Again, a click sound will be heard, indicat-
ing the collet is fully closed and the tool is
secure.
When changing tools, be sure that the hand-
piece motor is not running. If you attempt a
tool change under this condition, the motor
will be stalled and damage will occur.
Collet Removal
The Angle Rotary Handpieces can accept
many different size collets (see Specifications).
Standard sizes are 3⁄32" (2.35mm) and 1⁄8"
(3.2mm).
To change collets, turn the Collet Release Ring
to the full “R” position and remove the tool in
the collet. Hold the collet between the thumb
and forefinger and turn in a counterclockwise
direction until the collet is removed (see fig.
3). Insert the new collet and reverse the pro-
cedure. It is best to always tighten a replaced
collet by hand using the Collet Wrench (#510-
0180), securing until just tight.
Release
Secure
Fig. 2
Secure
Release
S
R
Fig. 3

7
If the collet cannot be loosened by hand
using the Collet Wrench, additional torque
may be required. To use the Collet Wrench,
place the triangular cutout in the wrench
over the collet and turn counterclockwise to
loosen and clockwise to tighten the collet. If
more torque is required, hold the handpiece
with the Collet Wrench secure on the collet,
and tap the wrench with a solid tool (see
fig. 3a) in a counterclockwise direction. This
procedure will loosen the collet, which can
then be removed by hand.
If the collet is so tight that the above proce-
dure will not loosen it, then remove the Head
Assembly from the Motor Assembly. This can
be done by grasping the Motor Connecting
Ring (see fig. 1) and pulling upward. Insert
the Chuck Joint Wrench (see fig. 3b) into the
Nylon Coupler (#510-0151), hold the Head
Assembly and Wrench securely in one hand,
and with the Collet Wrench in place on the
collet, loosen in a counterclockwise direc-
tion (for parts drawing, refer to page 11).
After a collet is replaced, be sure that the
Collet Release Ring is rotated to its full “S”
position and that the collet rotates freely
when turned by hand. If the collet does not
rotate freely, it is not fully seated in the Head
Assembly, and you must repeat the remov-
al-replacement procedure.
Fig. 3a
Chuck
Joint
Wrench
Tighten
Loosen
Collet
Wrench
R
Fig. 3b

201 Hancock Ave. Bridgeport, CT 06605, USA
orders 800.243.4466 |203.366.5400 |fax [phone]
email [email protected] |www.gesswein.com
Power Hand component selection:
•2 controllers
•Six motors (three high torque,
two standard, and one high speed)
•A selection of 8 heads
•Two reciprocating profilers
•One side-to-side profiler
•Belt Sander
Power Hand controllers and handpieces combine to create the most versatile
finishing system in the industry, offering rotary, profiling and belt sanding action.
#890-2060/0817