Central Machinery 93981 User Manual

Central Machinery 93981

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FOUR INCH BELT AND

6 INCH DISC SANDER

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 MISSION OAKS BLVD., CAMARILLO, CA 93011

VISIT OUR WEB SITE AT HTTP://WWW.HARBORFREIGHT.COM

Copyright

©

2006 by Harbor Freight Tools

®

. All rights reserved. No portion of

this manual or any artwork contained herein may be reproduced in any shape

or form without the express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353

93981

Due to continuing improvements, actual product may

differ slightly from the product described herein.

Questions and Answers:

S
Shari CharlesJul 30, 2025
What to do if Central Machinery Belt Sander does not turn on?
- Z
  Zachary HuberJul 30, 2025
  If your Central Machinery Sander does not turn on, first ensure it is properly connected to an electrical outlet. Then, check if the switch key is inserted into the switch; if not, insert it and push the switch to the 'On' position. Also, verify that the GFCI or facility circuit breaker is not open and reset them if necessary. If the issue persists, the power switch may be defective and require replacement. In some cases, a motor or wiring problem might be the cause, requiring repair by a qualified technician.
C
carrolljeffreyAug 6, 2025
Why does my Central Machinery Sander motor slow down when sanding?
- X
  xmitchellAug 6, 2025
  If the motor of your Central Machinery Sander slows down while sanding, it could be due to a V-belt that is too tight, which requires a qualified technician to loosen the tension. Alternatively, you might be applying too much pressure on the stock. Try to apply less pressure when sanding to see if this resolves the issue.
O
olsenchristopherAug 14, 2025
Why is wood burning while sanding with my Central Machinery Sander?
- P
  Patricia DicksonAug 14, 2025
  If wood burns while using your Central Machinery Sander, it's likely that the sanding disc or belt is loaded with debris. To resolve this, clean or replace the disc or belt.
A
angela48Aug 21, 2025
Why is my Central Machinery Sander making excessive noise?
- C
  Christina FisherAug 21, 2025
  If your Central Machinery Sander is making excessive noise, it might be because the V-belt is too tight. A qualified technician needs to loosen it.

Central Machinery 93981 Specifications

General

Disc Speed	3450 RPM
Motor	1/2 HP
Voltage	120V
Type	Belt and Disc Sander
Table Tilt	0-45 degrees
Disc Diameter	6 inches
Belt Size	4 inches x 36 inches

Summary

General Safety Rules

Work Area Safety

Keep work area clean, lit, and free from hazards.

Electrical Safety Precautions

Avoid grounded surfaces and wet conditions to prevent electric shock.

General Safety Rules Continued

Grounded Tools Safety

Ensure tools are plugged into grounded outlets per codes and ordinances.

Double Insulated Tools

Understand polarized plugs and the double insulation system.

Personal Safety Guidelines

Stay alert, dress properly, avoid accidental starting, and use safety equipment.

Tool Use and Care

Disconnect Power Cord

Unplug before adjustments, accessory changes, or storing the tool.

Tool Maintenance

Keep cutting tools sharp and clean; do not use damaged tools.

Specific Safety Rules for This Product

Wear Appropriate Safety Gear

Always wear ANSI-approved safety goggles and heavy work gloves.

Maintain Safe Working Environment

Keep work area well-lit, clean, and free of obstructions.

GFCI Protected Outlet

Always connect the line cord to a Ground Fault Circuit Interrupter outlet.

Disc Sanding Technique

Do not use the right side of the disc for sanding to avoid kickback.

Grounding Information

Improper Grounding Risk

Improper grounding risks electric shock; consult an electrician if unsure.

Double Insulated Tools

Double insulated tools do not require grounding and have special insulation.

Extension Cords Guide

Cord Gauge and Distance

Use heavier gauge cords for longer distances to avoid voltage drop.

Extension Cord Condition

Ensure extension cords are properly wired and in good electrical condition.

Assembly Instructions

Feet Placement

Attach the four rubber feet to the base corners of the sander.

Assembly Instructions Continued

Mounting the Sanding Disc

Mount the sanding disc onto the drive shaft securely.

Table Installation

Install the table support structure by attaching the table bar.

Operating Instructions

Controls and Adjustments Overview

Overview of operational controls and adjustment knobs on the sander.

Operating Instructions Continued

On / Off Switch Operation

How to use the locking on/off switch with the key for safe operation.

Sanding Safety Tips

Tips for safe sanding, including disc clearance and avoiding kickback.

Adjusting Sanding Belt Tracking

How to adjust the belt to track correctly on the rollers.

Inspection, Maintenance, and Cleaning

Pre-use Inspection

Check for loose screws, damage, or misalignment before each use.

Dust Removal

Use compressed air to blow out dust and debris from the sander.

Inspection, Maintenance, and Cleaning Continued

Sanding Belt Replacement

Steps for safely removing and replacing the sanding belt.

Troubleshooting Guide

Parts List

Assembly Drawing

Warranty Information

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