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Central Pneumatic 93088 - User Manual

Central Pneumatic 93088
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1/4” AIR ANGLE DIE GRINDER
93088
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright
©
2005, 2009 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. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 11h

Table of Contents

Questions and Answers

  • J
    Joe LopezJul 30, 2025
    Why is my Central Pneumatic 93088 Grinder output decreased?
    • K
      Katherine CarterJul 30, 2025
      There are several potential reasons for decreased output: First, check for loose connections and ensure your air supply provides sufficient airflow (CFM) at the required pressure (PSI), not exceeding 90 PSI. Then, clean around the trigger lever to allow free movement, lubricate with air tool oil and grease as directed, and clean the air inlet screen. Ensure the housing is correctly assembled and tight. If these steps don't resolve the issue, have a qualified technician clean and lubricate the tool, installing an in-line filter in the air supply. As a last resort, replace all vanes.
  • O
    olsonlauraAug 9, 2025
    What to do if Central Pneumatic 93088 Grinder housing heats up during use?
    • M
      Michael HardingAug 9, 2025
      If the housing of your Central Pneumatic Grinder heats up during use, first, lubricate it using air tool oil and grease according to the provided directions. If the problem persists, have a qualified technician inspect the internal mechanism and replace any parts as needed.
  • L
    Lori QuinnAug 19, 2025
    How to fix severe air leakage in Central Pneumatic 93088?
    • M
      Mary StewartAug 19, 2025
      To address severe air leakage in your Central Pneumatic Grinder (note that slight leakage is normal, especially in older tools), start by checking for incorrect alignment and uneven gaps. If you find cross-threading, disassemble the unit and replace any damaged parts before using it again. Next, tighten the housing assembly. If the housing cannot be tightened properly, the internal parts may be misaligned. If the issue continues, replace any damaged components, or clean or replace the valve assembly.

Summary

SET UP AND OPERATING INSTRUCTIONS

IMPORTANT SAFETY INSTRUCTIONS

General

Read all instructions to reduce risks of electric shock, fire, and injury.

Work area

Keep work area clean, well-lit, and free from explosive atmospheres to prevent fire and injury.

Personal safety

Stay alert, use common sense, and avoid operating while tired or under the influence of drugs or alcohol.

Tool use and care

Secure workpiece with clamps or practical means for stable support and control.

Service

Tool service must be performed by qualified personnel using identical replacement parts.

Air source

Never connect to an air source exceeding 90 PSI. Use only clean, dry, regulated compressed air.

SYMBOLS AND SPECIFIC SAFETY INSTRUCTIONS

Symbol Definitions

Definitions for symbols used in the manual, covering technical specs and safety warnings.

Specific Safety Instructions

Covers warnings about dust, accessories, and general safety precautions not covered elsewhere.

Vibration Precautions

Precautions to reduce risk of vibration-related injury, including medical advice, smoking, gloves, and work practices.

FUNCTIONAL DESCRIPTION

Specifications

Details maximum air pressure, speed, air consumption, and collet size for the die grinder.

Unpacking

Instructions for checking the item for damage or missing parts upon arrival and preparing it for setup.

Air Supply

Instructions for connecting the air supply, recommended components, and warnings against improper air sources.

OPERATING INSTRUCTIONS

Tool Set Up

Instructions for setting up the tool, including connecting the air supply and ensuring it's ready for operation.

Specific Operating Instructions

Detailed steps for attaching accessories, connecting air, and operating the die grinder for various tasks.

USER-MAINTENANCE INSTRUCTIONS

Cleaning, Maintenance, and Lubrication

Procedures for daily air supply maintenance, periodic grease lubrication, and trigger lever lubrication.

Troubleshooting

PARTS LIST

PARTS DIAGRAM

90 Day Warranty

Central Pneumatic 93088 Specifications

General IconGeneral
Power SourcePneumatic
Average Air Pressure90 PSI
Air Consumption6 CFM
Hose Size3/8 inch
Weight3.3 lbs

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