Hudy 101081 User manual

#101081 HUDY DIAMOND CUTTING TOOL
This professional Diamond Cutting Tool has a diamond tip
to provide unmatched precision cutting of armature
commutators.
To allow your electric motor to have optimum power
throughout its lifespan, it is necessary to regularly cut the
armature commutator to expose fresh contact area and
smoothen the surface. This Diamond Cutting Tool is the
ultimate cutting tool for use with all Hudy Comm Lathes,
giving professional results every time.
ULTIMATE PROFESSIONAL R/C TOOLS
This professional Diamond
Cutting Tool has a diamond tip,
which is the hardest known
material but is also very
breakable if not installed and
used properly.
Be sure to carefully read this
instruction manual before
using this great tool.

INSTALLATION
Pay attention not to damage the diamond tip!
Remove the previous cutting tool (if present).
Fasten the Diamond Cutting Tool in the cutting tool mount and adjust the
height of the tool with shims to ensure there is enough vertical clearance
between the cutting tool and the stand.
When using HUDY comm lathes:
- for RC car motors there should be 0.15-0.20mm clearance
- for slot car motors there should be 0.35-0.40mm clearance
When using the tool in other lathes, we recommend 0.00-0.05mm
clearance, unless otherwise specified in the original manufacturer's
instructions.
Be sure that the cutting tool is secure in its mount, and does not vibrate.
Do not overtighten the clamping screws otherwise tool clearance may be
reduced.
For more information about installing the cutting tool and setting proper
clearance, see the documentation accompanying the comm lathe.
ARMATURE CUTTING
The armature should turn so that the comm moves upward where it
contacts the cutting tool. If the armature turns in the opposite direction,
it will break the tip of the cutting tool.
While cutting pay attention to where the tool stops moving along the comm.
Adjust the comm lathe's adjustable stop screw to prevent the cutting tool
from hitting the winding tabs on the armature; this can severely damage the
cutting tool.
MAINTENANCE
Clean the tip of the cutting with a cotton swab after each use.
DO NOT try to clean it with anything hard (example, a screwdriver).
DO NOT try to resharpen the tip of the cutting tool.

USEFUL INFORMATION
Resharpening the Diamond Cutting Tool
Due to the complex process of manufacturing the cutting tool, it is cheaper to
purchase a new tool rather than try to rework the existing tool. Contact your
distributor or local shop for information on obtaining a new cutting tool.
Direction of cutting passes
When cutting move the bit from the right to the left and back. You can repeat
this operation as many times as necessary until the surface of the comm is
smooth.
Depth of cut
We recommended you adjust the cutting depth only one notch per pass.
Minimum comm diameter
You can cut the comm as long as there is a visible copper layer.
Number of cutting passes
You can run the bit across the comm as many times as necessary until the
desired cut is achieved.
For the automatic comm lathe we recommend you run the cutting tool across
the comm 2-3 times at maximum speed, then 1-2 times at minimum speed to
finish.
Length of cut
Adjust the comm lathe's adjustable stop screw to keep the cutting tool a safe
distance from the wiring tabs. Never hit the tabs! This will break the cutting
tool.
Cutting fluid and lubricant
The combination of Hudy Comm Lathe + plastic clips + Diamond Cutting Tool
makes a perfect cut without using cutting fluid or lubricant. However, you may
use any cutting fluid if you want to.
If you are using a Hudy Comm Lathe with hardened V guides, lubricate the
contact area with graphite powder to reduce friction between the guides and
the armature, and extend the lifetime.

Each Diamond Cutting Tool is specially manufactured under rigid
control and carefully inspected under microscope to guarantee
100% quality of each new tool.
If you follow these instructions, HUDY guarantees high-quality,
high-reliability armature cutting as well as a long life span for this
great tool.
We hope that you will be satisfied with the performance and
quality of this equipment. If you have any questions or advice
about how to improve this equipment, please do not hesitate to
contact us.
Thank you for choosing HUDY products!
Small regularly repeating grooves on the comm after a cut
The cutting tool is not held firmly, and it moves while you are cutting. Tighten
the two screws in the tool block that holds the cutting tool.
Cut comm does not have a mirror finish
A mirror finish is not as important as a smooth comm surface; the comm
must be smooth and even, as the entire burned layer must be cut down.
A mirror finish does not affect the quality of the cut nor the performance of
the motor.
Comm is coned after a cut
To achieve the best motor performance, the comm must have an even (non-
coned) surface. That is, the comm’s diameter at the both ends and the middle
must be the same. If the comm is cut conic, this means that the stands are
slightly out of alignment. This sometimes happens if you have replaced a stock
stand with the optional Axial Support, and that stand is not set properly.
Please refer to the instructions accompanying the stand to understand how
to set it properly.
HUDY, Pred Polom 762, 911 01 Trencin, Slovak Republic, Europe, tel.: ++421 32 7440 180, fax: ++421 32 7440 179
Table of contents