---
product_id: 195643307
title: "3mirrors Shaft Adapter Pulley Stainless Steel 3/4\" to 1\" Inch Gas Engine Pulley Crank Shaft Sleeve Adapter Predator w/Step Key"
brand: "3mirrors"
price: "4086 som"
currency: KGS
in_stock: true
reviews_count: 9
category: "3mirrors"
url: https://www.desertcart.kg/products/195643307-3mirrors-shaft-adapter-pulley-stainless-steel-3-4-to-1
store_origin: KG
region: Kyrgyzstan
---

# 3/4" to 1" shaft size upgrade Stainless Steel 304 - rustproof strength Precision fit with step key slot 3mirrors Shaft Adapter Pulley Stainless Steel 3/4" to 1" Inch Gas Engine Pulley Crank Shaft Sleeve Adapter Predator w/Step Key

**Brand:** 3mirrors
**Price:** 4086 som
**Availability:** ✅ In Stock

## Summary

> ⚙️ Upgrade your engine game — fit, function, and finesse in one sleek adapter!

## Quick Answers

- **What is this?** 3mirrors Shaft Adapter Pulley Stainless Steel 3/4" to 1" Inch Gas Engine Pulley Crank Shaft Sleeve Adapter Predator w/Step Key by 3mirrors
- **How much does it cost?** 4086 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/195643307-3mirrors-shaft-adapter-pulley-stainless-steel-3-4-to-1)

## Best For

- 3mirrors enthusiasts

## Why This Product

- Trusted 3mirrors brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **DIY Power Hack:** Save big by adapting existing motors and pulleys instead of buying new components.
- • **Trusted by Pros:** Highly rated with 4.5 stars and a top 300 rank in automotive replacement parts.
- • **Unmatched Durability:** Crafted from premium stainless steel 304 for corrosion resistance and long-lasting performance.
- • **Precision Engineering:** Includes a 3/16" keyway slot and step key for secure, wobble-free installation.
- • **Seamless Shaft Upgrade:** Effortlessly converts 3/4" shafts to 1", expanding compatibility with pulleys and gearboxes.

## Overview

The 3mirrors Shaft Adapter Pulley is a stainless steel 304 sleeve designed to convert 3/4" gas engine crankshafts to 1" diameter, enabling compatibility with larger pulleys and gearboxes. Featuring a precision 3/16" keyway slot and step key, it ensures a secure fit that prevents slippage. Ideal for DIY enthusiasts and professionals alike, this adapter extends the life of existing engine components, saving costs while enhancing performance.

## Description

Sleeve inside diameter 3/4” Sleeve outside diameter 1” Sleeve length is about 2.3” Sleeve Keyway slot 3/16” Step Key Length is about 1.8”

Review: Great product - Worked like a charm. Fit the motor shaft and the pully. I would recommend buying again
Review: Love it! - What a great deal. - Worked very well and just needed to cut to fit

## Features

- Superior Quality- Our Crank Shaft Adapter Pulley kit is made of Stainless Steel 304. They are more durable and strong than ordinary iron parts. Never rust and better protect the crank.
- Precision Fit- Works with Gas Engine Crank Shafts to enlarge the crank diameter and increase the shaft size to fit pulleys, gearboxes, etc.
- DIY install a Shaft Sleeve Adapter kit will help reduce the necessity of buying a new motor or pulley, to maintain existing components and speed/power requirements. Help you save a lot!
- Alters motors with different diameter shafts, Alters pulleys for different speeds or belts. This allows you to use the old clutch or pulley on a new engine.
- Upgraded new Crankshaft Sleeve Adapter. Adapts larger wheel bores to smaller axles. This steel shaft adapter is used to convert the crankshaft. 3mirrors brand is a professional auto parts seller, if you have any questions, please feel free to let us help you solve them. Thanks!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082X48D8F |
| Best Sellers Rank | #16,724 in Automotive ( See Top 100 in Automotive ) #259 in Automotive Replacement Engine Parts |
| Brand | 3mirrors |
| Customer Reviews | 4.5 4.5 out of 5 stars (490) |
| Date First Available | December 3, 2019 |
| Item Weight | 3.52 ounces |
| Manufacturer | 3mirrors |
| Package Dimensions | 2.76 x 2.6 x 1.1 inches |

## Images

![3mirrors Shaft Adapter Pulley Stainless Steel 3/4" to 1" Inch Gas Engine Pulley Crank Shaft Sleeve Adapter Predator w/Step Key - Image 1](https://m.media-amazon.com/images/I/61XFt0vvrEL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by A***R on January 9, 2025*

Worked like a charm. Fit the motor shaft and the pully. I would recommend buying again

### ⭐⭐⭐⭐⭐ Love it! - What a great deal.
*by J***T on March 21, 2025*

Worked very well and just needed to cut to fit

### ⭐⭐⭐⭐⭐ Saved me from having to buy a new motor!
*by Z***K on June 7, 2025*

I'm replacing Harbor Freight's dust collection motor that has the 20mm shaft that's basically close to 3/4". Some of you know that those motors are only designed for 110V and it's not exactly 2HP like they advertise so replacing it with a 120/240V motor from Grizzly with the standard 5/8" which I didn't double check. I looked around on Amazon and sure enough, there's an adapter! It is indeed stainless steel checked with my magnet and is of quality. It slipped on the 5/8" shaft with very little play. I already bought some stainless cup point set screws and will drill into the impeller's side at 90 degree each to keep them held in place. There's plenty of length so I'll be cutting it nice and flush with my metal saw. The key for the adapter exposes out enough it shouldn't be an issue. For the price, you can't beat it! Otherwise, I'd have to shell out more money to get the right motor.

## Frequently Bought Together

- 3mirrors Shaft Adapter Pulley Stainless Steel 3/4" to 1" Inch Gas Engine Pulley Crank Shaft Sleeve Adapter Predator w/Step Key
- Poweka 3/4" to 1" Inch Gas Engine Crank Shaft Sleeve Adapter Predator Pulley Bore Reducer Bushing Sheave with Step Key

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**Shop now:** [https://www.desertcart.kg/products/195643307-3mirrors-shaft-adapter-pulley-stainless-steel-3-4-to-1](https://www.desertcart.kg/products/195643307-3mirrors-shaft-adapter-pulley-stainless-steel-3-4-to-1)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-19*