Wen LA3421

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IMPORTANT: Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,

ease of operation, and operator safety. When properly cared for, this product will supply you years of rugged,

trouble-free performance. Pay close attention to the rules for safe operation, warnings, and cautions. If you use

your tool properly and for its intended purpose, you will enjoy years of safe, reliable service.

NEED HELP? CONTACT US!

Have product questions? Need technical support? Please feel free to contact us:

TECHSUPPORT@WENPRODUCTS.COM1-800-232-1195 (M-F 8AM-5PM CST)

For replacement parts and the most up-to-date instruction manuals, visit WENPRODUCTS.COM

VARIABLE SPEED

WOODWORKING LATHE

Instruction Manual

MODEL LA3421

Table of Contents

Questions and Answers:

O
owangJul 29, 2025
What to do if my Wen LA3421 Lathe motor or spindle stalls and won't start?
- J
  Jonathan McclureJul 29, 2025
  If your Wen Lathe's motor or spindle stalls and won't start, there are several potential causes. It could be due to an excessive cut (reduce the depth of the cut), a worn, damaged, or improperly adjusted belt (adjust or replace the belt), worn spindle bearing (replace the bearing), or a workpiece that is too large (switch to a smaller workpiece). Additionally, check the carbon brushes for wear and replace if needed. Finally, a blown fuse could be the culprit, so replace the fuse located on the rear of the control box.
J
Jason AndersonAug 12, 2025
Why is my Wen LA3421 Lathe experiencing excessive vibration?
- M
  Matthew BeckerAug 12, 2025
  Excessive vibration in your Wen Lathe can stem from several issues. The workpiece might be warped, out of round, have a major flaw, or was improperly prepared for turning. Correct this by planing or sawing the workpiece, or discard it and start over. Other causes include worn spindle bearings (replace the spindle bearings), a worn drive belt (replace the drive belt), or the lathe being on an uneven surface (place the lathe on a flat surface, such as a benchtop or lathe stand).

Wen LA3421 Specifications

General

Brand	Wen
Model	LA3421
Category	Lathe
Language	English

Summary

General Safety Rules

Work Area Safety

Guidelines for maintaining a safe work environment, including lighting, avoiding hazards, and keeping others clear.

Electrical Safety

Precautions regarding electrical cords, grounding, and avoiding wet conditions for safe operation.

Personal Safety

Advice on staying alert, using PPE, preventing accidental starts, and proper attire for safe operation.

Power Tool Use and Care

Instructions for proper use, maintenance, and handling of the power tool to ensure safety and longevity.

California Proposition 65 Warning

Electrical Information

Grounding Instructions

Details on proper grounding procedures to reduce the risk of electric shock.

Extension Cord Guidelines

Specific Rules for Your Lathe

Woodworking Lathe Safety

Specific safety precautions and best practices for operating the woodworking lathe.

Assembly & Adjustments

Mounting the Lathe on the Benchtop

Installing and Removing the Face Plate

Installing Drive Spur and Revolving Center

OnOff Switch

Speed Control Knob

Tailstock

Tool Rest

Operation

Spindle Turning

Detailed guide to setting up and performing spindle turning between centers.

Cutting Techniques

Mounting on the Face Plate

To Shape the Outside of the Bowl

To Shape the Inside of the Bowl

Maintenance

Troubleshooting Guide

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