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Jet BDB-919 User Manual

Jet BDB-919
56 pages
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Operating Instructions and Parts Manual
9x19, 9x29-inch Belt Drive Bench Lathes
Models BDB-919, -929
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-321378
Ph.: 800-274-6848 Edition 1 04/2017
www.jettools.com Copyright © 2017 JET

Table of Contents

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Jet BDB-919 Specifications

General IconGeneral
BrandJet
ModelBDB-919
CategoryLathe
LanguageEnglish

Summary

IMPORTANT SAFETY INSTRUCTIONS

GROUNDING INSTRUCTIONS

Details on grounding tools for electrical safety and risk reduction, emphasizing proper plug and outlet use.

For All Tools Applicable Safety

General safety precautions applicable to all tools, emphasizing reading manuals and maintaining safe work areas.

Introduction to JET Lathe Manual

Lathe Specifications

Unpacking Your Lathe

Contents of Shipping Container

Lists all parts included in the lathe's shipping container with reference to figure numbers.

Lathe Setup and Preparation

General Description of Lathe Components

Lathe Bed Construction

Details the material and construction of the lathe bed for rigidity and low vibration.

Headstock Assembly

Explains the headstock construction, spindle mounting, and belt change mechanism.

Lathe Carriage and Slides

Describes the carriage, cross slide, and top slide, including adjustments and tool post mounting.

Apron Functionality

Details the apron's mounting, half nut engagement, and how it facilitates quick apron travel.

Tailstock Operation

Explains the tailstock's movement, clamping, spindle, and taper socket.

Lead Screw Mechanism

Describes the mounting and function of the lead screw for automatic feed, including play adjustment.

Lathe Controls Identification

Lathe Operation Procedures

Tool Set-up and Height

Guides on correctly setting tool height and minimizing tool overhang for optimal cutting.

Manual Turning Techniques

Explains how to use handwheels for longitudinal and cross feeding during manual turning operations.

Longitudinal Turning with Auto-Feed

Details the procedure for engaging the automatic feed for longitudinal turning operations.

Taper Turning via Tailstock Offset

Describes how to create tapers by offsetting the tailstock and securing the workpiece.

Taper Turning using Top Slide

Explains the method for turning tapers by angling the top slide, suitable for short tapers.

Standard Thread Cutting

Covers cutting standard inch threads using the half nut and threading dial, referencing charts.

Metric Thread Cutting Process

Details the procedure for cutting metric threads, emphasizing continuous half nut engagement.

Lathe Accessories and Attachments

Three-Jaw Universal Lathe Chuck

Describes the function and clamping capabilities of the three-jaw universal chuck.

Adjustment and Replacement Procedures

Adjusting Main Spindle Bearings

Outlines the process for adjusting main spindle bearings if end play becomes evident.

Adjusting Cross and Top Slides

Explains how to adjust the cross and top slide gibs for proper fit and reduced play.

Adjusting Compound Feed Screw

Details the procedure for adjusting the compound feed screw and its nut to eliminate play.

Cross Slide Screw Backlash

Describes how to adjust the cross slide screw to eliminate backlash between the spindle and nut.

Adjusting Half-Nut Guides

Explains how to adjust the half-nut guides for free movement without play.

Replacing the V-Belt

Provides step-by-step instructions for safely removing and replacing the V-belt on the lathe.

Lathe Lubrication Schedule

Replacement Parts Identification

Headstock Assembly – Exploded View

Visual diagram showing all components of the headstock assembly with index numbers.

Headstock Assembly – Parts List

List of parts for the headstock assembly, including part numbers, descriptions, sizes, and quantities.

Drive Belt Assembly – Exploded View

Exploded view of the drive belt assembly, illustrating all constituent parts.

Drive Belt Assembly – Parts List

Detailed list of parts for the drive belt assembly, with part numbers and specifications.

Belt Tension Lever – Exploded View

Diagram showing the exploded view of the belt tension lever mechanism.

Change Gears – Exploded View

Exploded view illustrating the various change gears and their mounting hardware.

Electrical Components – Exploded View

Exploded diagram of the lathe's electrical components and their arrangement.

Electrical Components – Parts List

List of electrical parts, including part numbers, descriptions, and quantities.

Chuck Guard – Exploded View

Exploded view of the chuck guard assembly, showing its components.

Gear Box – Exploded View

Exploded view of the gear box assembly, illustrating its internal gears and parts.

Gear Box – Parts List

List of parts for the gear box, including part numbers and specifications.

Apron I – Exploded View

Exploded view of the apron assembly (Version I), showing all parts.

Apron I – Parts List

Parts list for Apron I, detailing components, part numbers, and quantities.

Apron II – Exploded View

Exploded view of the apron assembly (Version II), showing its components.

Saddle and Cross Slide – Exploded View

Exploded view of the saddle and cross slide assembly, illustrating its parts.

Saddle and Cross Slide – Parts List

Parts list for the saddle and cross slide, with part numbers and quantities.

Compound Slide – Exploded View

Exploded view of the compound slide assembly, showing its components.

Compound Slide – Parts List

Parts list for the compound slide, detailing components, part numbers, and quantities.

Tailstock – Exploded View

Exploded view of the tailstock assembly, illustrating its parts.

Tailstock – Parts List

Parts list for the tailstock, with part numbers and quantities.

Steady Rest – Exploded View

Exploded view of the steady rest assembly, showing its components.

Follow Rest – Exploded View

Exploded view of the follow rest assembly, illustrating its parts.

BD-919 Bed Assembly – Exploded View

Exploded view of the BD-919 bed assembly, showing its components.

BDB-919 Bed Assembly – Parts List

Parts list for the BDB-919 bed assembly, detailing components, part numbers, and quantities.

BDB-929 Bed Assembly – Exploded View

Exploded view of the BDB-929 bed assembly, illustrating its parts.

BDB-929 Bed Assembly – Parts List

Parts list for the BDB-929 bed assembly, with part numbers and quantities.

Accessories – Exploded View

Exploded view of various lathe accessories, showing their components.

BDB-919 Stand #321375 – Exploded View

Exploded view of the optional stand for BDB-919, showing its parts.

BDB-929 Stand #321377 – Exploded View

Exploded view of the optional stand for BDB-929, illustrating its parts.

Wiring Diagram for Lathes

Speed and Threading Charts

Warranty and Service Information

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