No. 70A and 75A Service Manual - Parts
Service and repair parts manual for Heald No. 70A and No. 75A internal grinding machines, covering the plain bearing workhead with cross-slide type assembly. This document provides detailed technical drawings and dimensional specifications for all workhead components used on these classic Heald grinding machines. Designed as a companion to Bulletin 7089-7006, this manual gives technicians and machine operators the parts information and assembly reference needed for maintenance, troubleshooting, and repair work on the spindle head assembly and related precision components.
Table of Contents:
- INSTALLATION
- The Foundation
- Cleaning the Machine
- Aligning the Machine
- Mounting Countershaft on Belt Drive Machines
- Wiring the Machine
- Attaching Coolant Tank
- LUBRICATION
- Wheelhead Lubrication
- Motor Lubrication
- Lubrication Instructions
- No. 70A Internal
- No. 75A Internal
- Lubrication Diagrams
- No. 70A Internal
- No. 75A Internal
- SETTING UP THE MACHINE
- Functional Diagrams
- No. 70A Internal
- No. 75A Internal
- Attach Work Fixture
- Install Wheelhead and Adjust Drive
- Adjust Coolant Attachments
- Set Grinding Stroke
- No. 70A Internal
- No. 75A Internal
- Speeds and Feeds
- No. 70A Internal
- No. 75A Internal
- Attach Truing Unit and Bridge
- True New Wheel
- Test Grind for Straightness
- Grind to Finish Size
- Set Diamond for Size
- Description of Cross-slide—No. 70A Internal
- Make Cross-slide Adjustments—No. 70A Internal
- Determine Compensation for Wheel Wear and Trueing—No. 70A Internal
- Grind—No. 70A Internal
- Grind—No. 75A Internal
- MAINTENANCE ADJUSTMENTS
- Servicing Wheelheads
- Adjust Wheelhead Cross-side Gib
- Adjust Wheelhead Belt Tension
- Adjust Workhead Spindle Bearings
- Adjust Main Table Clutch—No. 70A Internal
- GRINDING WHEELS
- Table of Correct Sizes
- WHEELHEADS
- Tables Showing Styles and Sizes Suitable for No. 70A and No. 75A Internal Grinding Machines
- SERVICE REPAIR PARTS
- Index of Units
- Section Drawings of Machine Units
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Document Details
- Format
- Pages
- 67
- Size
- 7.6 MB
- Category
- Machine Tools