Henry Tools 4123GL Guide

The Henry Tool Co., Manufactured by Henry Tools
498 So. Belvoir Blvd., South Euclid, OH 44121 U.S.A.
Ph: [phone] or [phone] ● Fax: [phone] or [phone]
Email: da[email protected] ● Website: www.Henrytools.com
H ENRY T OOLS H ENRY T OOLS
Industrial Airtools at Work
General Safety and Maintenance Manual
MODELS
4123GL
4123GL+6”
Model
Number
Exhaust
Direction
Throttle
Type
Speed Power
Output
Case
Mate-
rial
Weight Length Diameter Air
Consump-
tion
Collet Size
Alumi-
num
Steel
4123G Side
(Side is
Standard)
(L) Lever
or
(K) Safety
Lever
15000
to
22000
R.P.M.
(18000RPM is
Standard)
0.9 H.P.
675 W
Steel
or
Alumi-
num
1.6 lb/0.7
Kg
2.0 lb/0.9
Kg
6.6 inch
167 mm
1.6
inches
41 mm
25cfm
11.8 L/S
1/8”, 1/4”, 5/16”,
3/8”
4123G+6 1.8 lb/0.8
Kg
2.5
lb/1.1
Kg
12.3 inch
312 mm
4123GLS+6” Model with super extended length spindle
shown above.
Model 4123GLS Die Grinder.
SUPER HEAVY DUTY DIE GRINDER SERIES

HENRY TOOLS, INC. Ph: [phone] or [phone]
General Operators Instructions and Service Manual
www.HenryTools.com | Page 249 Revised 04/11/11
For additional product information visit our website.
MODEL
4123GL
4123GL+6”
4123GLS+6” Model with super ex-
tended length spindle shown above.

HENRY TOOLS, INC. Ph: [phone] or [phone]
General Operators Instructions and Service Manual
www.HenryTools.com | Page 250 Revised 04/11/11
For additional product information visit our website.
MODEL
4123GL
4123GL+6”
PART NUMBER DESCRIPTION
209-1 COLLET NUT
209-1/8 1/8” INSERT
209-3/16 3/16” INSERT
209-1/4 1/4” INSERT
209-3/8 3/8” INSERT
400-G-26 THROTTLE LEVER
400-G-29 THROTTLE VALVE
(INCLUDES 844302)
400-G-34 SPRING
400-2G CYLINDER
400-6 BLADE (4 REQ.)
400-44 ROLL PIN
400-51 0-RING
402-126 SAFETY LEVER
402-127 SAFETY LEVER PIN
402-128 LOCKOUT LEVER
402-129 SAFETY LEVER SPRING
402-132 ALUMINUM CASE specify speed
402-132-S “STEEL CASE
(SPECIFY SPEED)”
402-134 MUFFLER
403-7 FRONT ENDPLATE
403-38 FRONT MOTOR RETAINER
404-9 REAR BEARING
404-19 REAR ENDPLATE
404-38 BEARING COVER
404-39 SNAP RING
410-G-17-S “STEEL SIDE EXHAUST
SLEEVE”
700-37 THROTTLE LEVER PIN
1100-672 STANDARD COLLET BODY
1100-678 EXTENDED COLLET BODY(+6)
4031-5A ROTOR/SPINDLE
4031-5R ROTOR SPACER
590031 FRONT BEARING
591106 SET SCREW
(SPECIFY SPEED)
592016 SNAP RING
594016 0-RING
832636 GASKET
841552 3/8 NPT TO 3/8 NPT BUSHING
PART NUMBER DESCRIPTION
841553 3/8 NPT TO 1/4 NPT BUSHING
844302 0-RING
869311 THROTTLE VALVE CAP
ASSEMBLIES
PART NUMBER DESCRIPTION
510206 REPAIR KIT Model 4123Series
402-26 SAFETY LEVER ASSY.
AA-402-132 ALUMINUM CASE ASSY.
AA-402-132-K ALUMINUM SAFETY CASE AS-
SEMBLY.
AA-402-132-S STEEL CASE ASSEMBLY
AA-402-132-
SK
STEEL SAFETY CASE ASSY.
WRENCHES
1100-068 11/16”WRENCH
1100-075 3/4”WRENCH
SAFETY
1. Before operation check spindle speed with a tachom-
eter. If the RPM’s exceeds the rated speed stamped on tool,
servicing is required. For safety reasons and product liability
prohibit any modications to tools.
2. Inspect carbide burrs or mounted points for bends, chips,
nicks, cracks or severe wear. If they have any of these prob-
lems do not use. On brushes check for loose wires that may y
o in operation.
3. Start new mounted points or burrs under a steel bench.
Run at full throttle for one minute.
4. The 4123 series die grinders are intended for use with
Burrs/Mounted Stones of shank size 1/8 inch, 1/4 inch, 5/16
inch, 3/8 inch, 3mm, 6mm, 8mm. only. They are NOT guarded
for type 1 wheels. If you have a type 1 wheel application,
please purchase a dierent model tool.
5. At least one-half of the mandrel length (i.e. mounted
wheel, burr, etc.) must be inserted into the collet. Secure collet
chuck tightly.
6. Safety levers are available from the manufacturer (402-
26).
7. Before mounting or removing a Burr/mounted point dis-
connect the grinder from air supply. Wear safety goggles and
other protective clothing (when necessary).(See regulations.)
8. Properly maintained air tools are less likely to fail or
cause accidents. If tool vibrates or produces an unusual sound,
repair immediately.
4123GLS+6” Model with super extended
length spindle shown above.

HENRY TOOLS, INC. Ph: [phone] or [phone]
General Operators Instructions and Service Manual
www.HenryTools.com | Page 251 Revised 04/11/11
For additional product information visit our website.
LUBRICATION
Lubricate the motor with an air line lubricator,
using a light air motor oil. Adjust the lubricator
to dispense one drop per cycle or three drops per
minute.
CAUTION Do not use substitutes for oil and grease.
This could result in damage to the tool.
MAINTENANCE
1. Proper and continuous lubrication.
2. Blow out air hose to assure a clean air supply.
3. Be sure the air lter and line lubricator are clean.
4. Fill the line lubricator before operation.
5. Place a few drops of oil into the air inlet of the
tool be-fore attaching the air line.
6. Use moisture separators to remove water from
the air line.
7. An air line lter-regulator-lubricator should be
located as closely as possible to the tool.
8. Keep screen handle bushing in tool.
WARNING: Disconnect the air supply hose before
servicing the tool.
Disassembly
1. Secure tool in vise vertically with output of
tool oriented toward upward direction. Clamp onto
the ats toward the rear of the motor housing.
2. Unscrew motor retainer (403-38) from motor
housing(402-132). Lift o exhaust deector(410-G-
17-S) and o-ring (400-51)if worn from motor hous-
ing. Remove motor assembly from housing.
3. Secure motor assembly into vise vertically with
output in the downward direction. Clamp onto
ats on the collet body (1100-672).
4. Remove snap ring (404-39) from rear endplate
(404-19) with use of snap ring pliers.
5. Lift out bearing cover (404-38) and o-ring
(594016).
6. Remove snap ring (592016) from groove of
rotor (4031-5A).
7. Using a soft-jawed vise. Secure motor assem-
bly into vise vertically with output toward down-
ward direction. Clamp lightly the outside diameter
of the cylinder (400-2G) and endplate (404-19).
8. Use a 3/16”punch to tap spindle out of rear
bearing (404-9). DoNoT drop the motor assembly
when it is free. Remove from vise.
9. Use a small punch to press the rear bearing
from the rear endplate.
10. Remove the 5 blades (400-6).
11. With soft jaws still in vise, clamp rmly onto
rotor (4031-5A) with output toward upward posi-
tion. Remove collet body (1100-672) (right hand
thread). Remove from vise.
12. Support the rotor assembly on a suitable drill
block. Press the spindle through the front bearing
MODEL
4123GL
4123GL+6”
assy. using an arbor press. Use a small punch to remove front bearing (590031)
from front endplate(403-7).
13. (opTioNal STep): To check throttle valve unscrew throttle valve cap (869311).
14. 14. (opTioNal STep): Lift out valve spring (400-G-34) and throttle valve (400-
G-29). Remove and replace o-ring (844302) if cracked or worn.
Assembly
1. Be sure that all parts are clean.
2. Press bearing (590031) into recessed area of front endplate (403-7).
3. Support the front bearing assembly on a suitable drill block. Press the rotor
(4031-5A) into the rear of front endplate and through front bearing.
4. With soft jaws on vise, clamp rmly onto rotor (4031-5A) with output
toward upward position. Install collet body (1100-672) (right hand thread).
Remove rotor from vise.
5. Secure motor assembly into vise vertically with output in the downward
direction. Clamp onto ats on the collet body (1100-672).
6. Place ve blades (400-6) into blade slots.
7. Slip cylinder (400-2G) over rotor and onto endplate. The small pin on face of
cylinder should face toward rear to tool.
8. Place rear endplate (404-19) onto cylinder. Locate the pin of the cylinder
into the small hole of the rear endplate.
9. Press bearing (404-9) into rear endplate with a suitable bearing driver.
10. Install retaining ring (592016) into groove on spindle with snap ring pliers.
11. Place o-ring (594016) and bearing cover (404-38) into rear endplate.
12. Install snap ring (404-39) into groove of reard endplate.
13. Secure motor housing (402-132) in vise vertically with output of tool
toward upward direction. Clamp onto the ats toward the rear of the motor
housing.
14. Place o-ring (400-51), exhaust screen (402-134) and exhaust deector
(410-G-17-S) onto motor housing.
15. Slide front motor assembly into motor housing. Install motor retainer (403-
38). Tighten assemblies together.
16. Check the operating speed with a reliable tachometer. The speed must be at
or below the stamped speed on the tool.
FAULT CAUSE SOLUTION
Insucient
Power
Air pressure
too low
Minimum air pressure should be
90 PSI for maximum performance
Restriction in air
hose
Remove bends or other restric-
tions
Hose I.D. is too
small
Use required hose I.D.
Worn vanes Exchange vanes (400-6)
Screen Support
clogged
Clean screen support or ex-
change with new one
Machine does
not start
No air, shut-o
valve is closed.
Open shut-o valve
Worn vanes
due to lack of
oil or vanes are
jammed
Exchange vanes . (cylinder might
also be worn out)
Grinder does
not want to
stop
Worn O-Ring Replace o-ring in handle (844302)
for example.
Spindle
wobbles or
vibrates.
Bearings worn
out .
Danger!!
Disconnect tool from the air
supply. Immediate servicing is
required.
4123GLS+6” Model with super extended
length spindle shown above.