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Holbrook Minor User Manual

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Holbrook Minor Specifications

General IconGeneral
BrandHolbrook
ModelMinor
CategoryLathe
LanguageEnglish

Summary

Principal Data

Range Specifications

Details lathe's centre distance, swing, and tool section.

Headstock and Gearbox Specifications

Covers spindle bore, taper, nose, and gearbox pitch/feed specs.

Tailstock and Dimensions

Includes tailstock taper, quill travel, and overall machine dimensions.

Installation

Lifting the Machine

Describes proper procedures for lifting the lathe using a jack.

Foundation

Outlines requirements for a suitable machine foundation.

Cleaning

Instructions for cleaning the lathe after unpacking.

Levelling the Machine

Method for levelling the lathe using a block level.

Electrical Connection

Details on power supply requirements and connection procedures.

Design and Capacity Section

Main Controls

Identifies and describes the main control panel components.

Machine Capacity Specifications

Lists centres, swing, cam-lock nose, and thread specifications.

Headstock and Drive System

Describes the headstock construction and the drive mechanism.

Gearbox and Apron/Carriage

Details on the gearbox and apron/carriage features.

Wiring Diagrams

Details of electrical wiring diagrams.

Tailstock and Leader Thrust Compensation

Description of tailstock features and leader thrust compensation.

Base Cabinet and Bed Structure

Description of the machine's base and bed design.

Machine Accessories and Attachments

Hydraulic Profiling Equipment

Details on Hepworth Type 150 Hydraulic Unit.

Thread Chasing and Taper Turning Attachments

Description of thread chasing and taper turning attachments.

Automatic Length Control Stops

Description of the length control stop equipment.

Tool Holders, Indexing Plates, and Steadies

Description of tool holders, indexing plates, and steadies.

Equipment Cabinets

Description of universal cabinet for tool storage.

Additional Equipment

Chucks, Toolholders, Collets, Gears, and Accessories

Lists chucks, toolholders, collets, gears, and other accessories.

Operation Section

General Precautions

General safety, lubrication, and starting clutch guidelines.

Alignment Check

Performing a turning test to confirm bed alignment.

Spindle Rotation Control

Using the joystick for spindle forward/reverse rotation and braking.

Spindle Speed Control

Adjusting spindle speed using the variator knob on the control panel.

Feed Control

Controlling feed rate via panel and apron controls.

Gearbox Controls and Threadcutting

Using gearbox controls and important notes for threadcutting operations.

Threading Method and Pitches

Step-by-step threading method and available pitch options.

Thread Cutting Formulas and Dial

Formulas for special/metric pitches and threading dial usage.

Diametral Pitch Settings

Tables for standard diametral pitches and required change gears.

Metric and Module Pitch Settings

Tables for standard metric and module pitches.

Screw Cutting and Performance

Screw cutting process and general performance notes.

Form Turning Limitations

Diagrams illustrating limitations for form turning.

Mechanical Accuracy and Slide Friction

Checks for mechanical accuracy and slide friction.

Hydraulic Circuit

Explanation of the hydraulic system's operation.

Machining Procedures

Shaft turning, blending machining, and unit operation methods.

Tailstocks

Diagrams and descriptions of tailstock components and functions.

Hydraulic Power Unit

Diagram of the hydraulic power unit and its components.

Faults, Causes, and Remedies

Inaccurate Reproduction Faults

Troubleshooting guide for faults causing inaccurate reproduction.

Erratic Performance Faults

Troubleshooting guide for faults causing erratic unit performance.

Profiling Equipment Specifications

Abridged Specification

General specifications for the profiling unit.

Pump Set Details

Specifics about the pump used in the profiling equipment.

Maintenance Section

Two Speed Gearbox and Leadscrew Adjustment

Maintenance procedures for the gearbox and leadscrew.

Safety Clutch and Kopp Variator Unit

Maintenance for the safety clutch and Kopp variator unit.

Variator Dismantling and Assembly

Steps for dismantling and reassembling the variator unit.

Variator Adjustment and Troubleshooting

Adjusting the variator and addressing load-related issues.

Cutting Fluids

Details on cutting fluid selection and maintenance.

Belt Tension and Headstock Bearing Adjustment

Adjusting belt tension and headstock spindle bearings.

Independent Feed Motor Check

Procedure for checking and maintaining the independent feed motor.

Appendix A: Errata

Diagram and Formula Corrections

Corrections for foundation diagram, oiling diagram, and formulas.

Appendix B: Addenda

Lubrication Addendum

Additional diagram for the Headstock Oiling System.

Fast Collet Attachment

Instructions for fitting and using the fast collet attachment.

Six Station Stop Attachment

Description and operation of the six station stop attachment.

Appendix C: Metric Machine Data

English Pitch Gearbox Settings

Charts detailing gearbox settings for English pitches.

Diametral Pitch Gearbox Settings

Charts detailing gearbox settings for diametral pitches.

Metric Module Pitch Gearbox Settings

Charts detailing gearbox settings for metric module pitches.

Gearing Layout

Diagram illustrating the gearing layout for metric machines.