Page 82-83 - LT_3722_v8_MRO.qxp

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GENERAL INFORMATION
SHAFT REPAIR
1. Using a lathe, undercut de sired depth according to the table below:
2. Finish undercutting by machining a rough-c ut surface or “gramophone”
pattern; the larger the diameter of the shaft, the deeper the threads.
(See Figure A)
3. Clean the shaft of any cutting fluids or oils with Loctite® ODC-Free
Cleanser & Degreaser.
4. Apply a very thin layer of Loctite® Fixmaster® Superior Me tal by forcing
it into the bottom of the threads. Turn the shaft at a very low speed
and continue to apply more material by using a tool, such as a putty
knife, that can be bent. (See Figure B)
5. Allow the product to cure for the required period at 70°F (20°C) or
higher (if necessary, apply dry heat to speed up the cure).
6. Machine repaired area to original dimensions of the shaft (see Figure C)
using the guidelines below:
Lathe Speed: 150 ft./min. (46 m/min.)
Feed Rate: • Roughening: 0.025 in./rev. (0.64 mm/rev.)
• Finishing: 0.010 in./rev. (0.25 mm/rev.)
Top Rake/Side and Front Clearance: 3°
Note: Cut dry; use carbide or high-speed steel bits. If polishing
is required, use only wet 400 to 600 grit emery paper.
Shaft diameter Desired undercut
1⁄2" to 1" (13 – 25 mm) 1⁄
16" (1.5 mm)
1" to 3" (25 – 74 mm) 1⁄8" (3.0 mm)
Figure A Figure B
Figure C