---
product_id: 478360538
title: "Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) -"
brand: "maxopro"
price: "€ 107.34"
currency: EUR
in_stock: true
reviews_count: 5
category: "Maxo Pro"
url: https://www.desertcart.sk/products/478360538-expanding-ring-mandrel-with-hex-allen-key-medium-size-steel
store_origin: SK
region: Slovakia
---

# Includes hex Allen key for quick adjustments Heavy-duty wear-resistant steel Precision fit for ring sizes 4-7 Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) -

**Brand:** maxopro
**Price:** € 107.34
**Availability:** ✅ In Stock

## Summary

> 🔩 Shape your legacy with precision and power!

## Quick Answers

- **What is this?** Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - by maxopro
- **How much does it cost?** € 107.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/478360538-expanding-ring-mandrel-with-hex-allen-key-medium-size-steel)

## Best For

- maxopro enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Size Swapping:** Quickly expand or contract the mandrel using the included hex Allen key—switch sizes in seconds without hassle.
- • **Professional Finish, Every Time:** Designed for lathe or drill use, this mandrel makes ring shaping 10x easier and delivers a polished, high-end look.
- • **Precision Engineering for Perfect Rings:** Fits ring sizes 4 to 7 with exact expanding control for flawless shaping every time.
- • **Built to Last with Industrial-Grade Steel:** Crafted from wear-resistant steel that outperforms wood and carbon steel—no rust, no wear, just durability.
- • **Protect Your Craft with Tape-Friendly Design:** Extra room on each size step lets you add tape to safeguard your rings’ interiors from scratches during turning.

## Overview

The MaxoPro Expanding Ring Mandrel is a compact, heavy-duty steel tool designed for ring makers working with sizes 4 to 7. Featuring a 1/2" base for versatile chuck compatibility and an included hex Allen key for easy size adjustments, it ensures durable, scratch-free ring shaping on lathes or drills. Engineered for longevity and professional results, this mandrel is a must-have for serious ring crafting professionals.

## Description

MAXOPRO STAINLESS STEEL RING MANDREL MEDIUM SIZE Expanding ring mandrel hold your rings snug while turning in a lathe. This is a Best-quality ring expander made of steel, which withstands much longer than regular steel. This ring expanding mandrel offer a high level of precision when making rings and used for stretching all soft precious metal i.e. silver, gold, copper rings excluding stone set rings. These are designed to be used in a lathe and fit in 1/2" drill chuck. ULTIMATE DESIGN There were several design aspects we wanted to incorporate into our expanding ring mandrels. We believe we have achieved the perfect combination of space on each step, length of the mandrel, and fitting the most ring sizes. Each step has plenty of room to snugly fit even the widest of rings on each step. Making the steps too wide or putting too many on one mandrel would make the mandrel too long. When a mandrel gets too long, it is unlikely to spin ideally . PERFECT FIT Sizes 7.5-10.5 fit perfectly on our mandrels, and we even have some overlap between the different sizes to ensure a perfect fit on one of your mandrels. Each step on the mandrel is a half size. (For example, size 7.5-10.5 fits 7.5,8 , 8.5, 9, 9.5, 10, and 10.5). If you need to go larger , adding some electric tape to your mandrel will do the trick. SPECIFICATIONS Material: High Quality Steel Size: Meidum Ring Size Capacity: 7.5 to 10.5 Diameter of shank - 1/2” or 12.7 mm

Review: Very weak broke after a handful of uses
Review: AWESOME tool that comes in handy. Great quality. I bought this when I was making my brother’s wedding ring (titanium) and needed a way to safely hold it in my lathe for grooving and polishing. This thing works GREAT!! It does work with a live center as well, however I recommend using a bull-nose if you have one, but it will work with a fully tapered/pointed center as well (i tried both just to see). 9.5/10.

## Features

- DESCRIPTION – This medium sized expanding ring mandrel for lathe fits ring sizes 7.5 to 10.5. This set also includes an Allen wrench to expand and contract the mandrel. It has 1/2" base to fit a variety of chucks and can be used in a lathe or drill
- ULTIMATE DURABILITY – Our expanding ring mandrels for ring making are made with wear-resistant steel. While other materials such as wood or carbon steel rust or wear down, these ring expanders will withstand the test of time even with heavy use
- BEST VALUE – Spinning your ring on a lathe will make it 10x easier to make rings compared to using a rotary tool or other methods. You will get a much more professional finish most of the time. If you’re making more than one size ring, this steel expanding ring mandrel set is a lifesaver because you can easily swap out any size and have a snug fit within seconds
- EASE OF USE – It’s effortless to use this expanding mandrel for lathe. There is extra room on each ring size to accommodate tape to keep the inside of your rings scratch-free. For proper function, apply a layer or two of tape to the step you will be using. This helps protect the inside of your ring
- SATISFACTION GUARANTEE – At MaxoPro, we stand by our products and offer a full refund warranty if you experience any issues with our Expanding ring mandrel set. Contact us through the desertcart messaging system, and we will be happy to assist you with any questions, problems, or difficulties you encounter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B3VD8BVT |
| Best Sellers Rank | #628,505 in Fashion ( See Top 100 in Fashion ) #425 in Ring Sizers |
| Brand Name | MaxoPro |
| Capacity | 0.63 Inches |
| Compatible Devices | Drilling Machine, Lathe |
| Customer Reviews | 4.3 4.3 out of 5 stars (129) |
| Handle Type | keyed |
| Included Components | 1x Medium Expanding Ring Mandrel, 1x Hex Key |
| Item Diameter | 0.63 Inches |
| Item Type Name | Jewelry Sizers & Mandrels |
| Item Weight | 0.16 Kilograms |
| Lock Type | Manual (keyed) |
| Manufacturer | MaxoPro |
| Manufacturer Part Number | 78331 |
| Material Type | Alloy Steel |
| Model Number | MP-78331 |
| UPC | 850037783311 |

## Product Details

- **Brand:** MaxoPro
- **Compatible devices:** Drilling Machine, Lathe
- **Item diameter:** 0.63 Inches
- **Item weight:** 0.16 Kilograms
- **Material:** Alloy Steel

## Images

![Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - - Image 1](https://m.media-amazon.com/images/I/71bU2FSyb2L.jpg)
![Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - - Image 2](https://m.media-amazon.com/images/I/813gbbKVf0L.jpg)
![Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - - Image 3](https://m.media-amazon.com/images/I/81k9NHAjDtL.jpg)
![Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - - Image 4](https://m.media-amazon.com/images/I/81JteTrEijL.jpg)
![Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) - - Image 5](https://m.media-amazon.com/images/I/81yyHh3v7fL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ Review
*by S***E on 21 July 2023*

Very weak broke after a handful of uses

### ⭐⭐⭐⭐⭐ Review
*by A***R on 30 October 2024*

AWESOME tool that comes in handy. Great quality. I bought this when I was making my brother’s wedding ring (titanium) and needed a way to safely hold it in my lathe for grooving and polishing. This thing works GREAT!! It does work with a live center as well, however I recommend using a bull-nose if you have one, but it will work with a fully tapered/pointed center as well (i tried both just to see). 9.5/10.

### ⭐⭐⭐ Review
*by E***K on 1 August 2025*

These work, but are a little limited. I imagine if you have a bigger lathe than I do these would be more useful. Rings hold onto them alright, but for the price it’s steep.

## Frequently Bought Together

- MaxoPro Heavy Duty Stainless Steel Expanding Ring Mandrel - Allen Key Included, Ring Sizes 4-7, For Lathe Turning and Making
- PAGOW 15Pcs Natural Sandalwood Wood Blanks Ring Craft, Wooden Jewelry Blanks, Craft Wood, 3x3x1cm
- Expanding Ring Mandrel-Ring Mandrel for Lathe,Ring Stretcher,Ring Sizes(7.5-10.5) Turning and Manufacturing Rings Making

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-05-29*