
Introduction
The Gesswein Power Hand Z-ANX Head Assembly is engineered and manufactured 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.
2

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)
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
3
4
5
6
7
8
3

4
Part# Item# Description
KU-234
8960265
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
JR21-112A
8960273
Housing
JR21-130
8960283
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
JR21-150
8960250
Sub Drive Shaft Complete, 3⁄32"
JR21-151
8960251
Sub Drive Shaft Complete, 3mm
JR21-152
8960252
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
5103077
Ball Bearing
JR21-106
8960260
Bearing Spacer
JR21-102
8960261
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)
JR21-200
8960275
Drive Shaft Complete
JR21-120A
8960276
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
Z-ANX Parts List
When ordering spare parts, always specify part# (or item# if applicable)
and description.

6
3. General Description of Use
Tool Changing
The Gesswein Power Hand Angle Rotary
Handpiece uses a quick-tool-release mechanism that allows for rapid tool changes. To
operate, turn the Collet Release Ring counterclockwise 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, indicating the collet is fully closed and the tool is
secure.
When changing tools, be sure that the handpiece 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 procedure. 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 procedure 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 direction (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 removal-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 203.366.3953
email info@gesswein.com | 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.
#890-2059/0817