---
product_id: 401594593
title: "Assorts Radius Ball Turning Tool for Lathe – 3/8\" Shank HSS Tool Bit – Turns Concave & Convex Balls – Fits 7x14 & 7x16 Mini Lathes"
price: "A$116"
currency: AUD
in_stock: false
reviews_count: 8
url: https://www.desertcart.com.au/products/401594593-assorts-radius-ball-turning-tool-for-lathe-3-8-shank
store_origin: AU
region: Australia
---

# 0–90° bearing base rotation DCMT11T304 carbide insert 65mm max radius capacity Assorts Radius Ball Turning Tool for Lathe – 3/8" Shank HSS Tool Bit – Turns Concave & Convex Balls – Fits 7x14 & 7x16 Mini Lathes

**Price:** A$116
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Master the art of perfect spheres — precision meets power in your workshop!

## Quick Answers

- **What is this?** Assorts Radius Ball Turning Tool for Lathe – 3/8" Shank HSS Tool Bit – Turns Concave & Convex Balls – Fits 7x14 & 7x16 Mini Lathes
- **How much does it cost?** A$116 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/401594593-assorts-radius-ball-turning-tool-for-lathe-3-8-shank)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Premium tool steel construction engineered for heavy-duty use and consistent professional results.
- • **Smooth Angular Control:** 0–90° bearing base rotation ensures flawless, repeatable cuts for complex spherical profiles.
- • **Carbide-Tipped Durability:** Long-lasting DCMT11T304 inserts deliver smooth finishes on tough metals without frequent replacements.
- • **Precision Sphere Crafting:** Turn perfect convex & concave balls up to 65mm radius with industrial-grade accuracy.
- • **Seamless Lathe Compatibility:** Direct fit for 7x14, 7x16, Myford & similar mini to larger lathes for quick, hassle-free setup.

## Overview

The Assorts Heavy-Duty Radius Ball Turning Attachment is a precision-engineered tool designed for mini and larger lathes, enabling machinists to create accurate convex and concave metal balls up to 65mm radius. Featuring durable DCMT11T304 carbide inserts and a robust bearing base with 0–90° rotation, it offers smooth, repeatable cuts and easy installation on popular lathe models. Crafted from premium tool steel, this attachment balances heavy-duty performance with fine control, ideal for professionals seeking flawless spherical turning.

## Description

Assorts Radius Ball Turning Tool for Lathe – 3/8" Shank HSS Tool Bit – Turns Concave & Convex Balls – Fits 7x14 & 7x16 Mini Lathes - desertcart.com

Review: Junk - spindle the handle is connected to isn't keyed, so slips. Thats the negative part. Can be fixed with a bit of machining, but something the manufacturer didnt care about, so you shouldn't care about supporting the manufacturer. FYI issues: 1. limited to diameter. Something I didnt consider when purchasing. Hopefully that helps you make a decision. 2. Handle on bit doesn't clear my QTP top ,so had to rotate the handle on the bit which could interfere with other things or introduce a safety issue.
Review: If you need small balls, this WILL make them! - The replacement for the first tool (received without a cutter bit) was complete. After I insured all screws were tight, I attached it to my lathe using a quick-change tool holder. First thing I tried was to simply turn a rounded end on a piece of Delrin plastic. It took a bit to get used to the process, but I turned a very nice half round onto the end of the plastic. I then chucked up a short length of 1/2" aluminum rod. I insured the rod end was far enough out of the chuck that the tool would not impact the chuck jaws in use. I undercut a length of the shaft from about 1/2" from the end of the rod back about an inch and turned that down to roughly 1/4 diameter. Then I set the tool horizontal to the work, touched off at the dead center of the rod. I moved the cross feed out far enough that the cutter was clear of the work. I then started the lathe and moved the bit in until it made contact with the right hand end of the work. I swung the handle left and right and knocked the edges off the work. I advanced the tool and swung the handle between the center of the end of the rod and back as far as it would go - that is, until it struck the undercut section of the rod. I continued advancing a little at a time until I was cutting the entire surface of the nicely-forming ball on the end of the shaft ! Once I had tool cutting during the entirety of the swing I stopped cutting and polished the ball and shaft with 400 grit sandpaper. The result a smooth, shiny ball about 3/8" diameter. I hadn't measured anything exactly in this test, just wanted to see if it worked. IT DOES!! Feed slowly and use enough speed to prevent chatter. I think this will work for all the small projects I may want balls for. I will try drilling and tapping the next one with 1/4-20 thread so I can screw it onto a "handle" - this is still test, try, learn mode. But think it will get lots of practical use in the future.

## Features

- Precision Radius Ball Turning Tool Designed For Accurate Machining Of Concave And Convex Metal Spheres On Mini Lathes.
- 3/8" Shank HSS Tool Bit Ideal For Light To Medium-duty Sphere Turning Operations On 7x14 & 7x16 Mini Lathes.
- Multiple Sizes To Suit Your Needs: From 3/8" Shank Hss Bits To Larger Radius Tools Supporting Up To 65mm Max Radius For A Wide Range Of Projects.
- Durable & Reliable Construction Designed For Repeated Use, Delivering Long-lasting Performance For Hobbyists, Machinists, And Professionals.
- Enhances Mini Lathe Capabilities By Enabling Complex Spherical Radius Turning Previously Difficult With Standard Lathe Tools.
- Compact Design For Easy Handling And Quick Tool Changes, Maximizing Workshop Efficiency And Productivity.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09KV8MGSZ |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #260,528 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #185 in Lathe Turning Tools |
| Color | Black |
| Customer Reviews | 2.9 2.9 out of 5 stars (27) |
| Date First Available | November 2, 2021 |
| Included Components | 1 ball turning |
| Item Package Quantity | 1 |
| Item Weight | 8.8 ounces |
| Item model number | ALRTA-19 |
| Manufacturer | Assort Machine Tools Co. |
| Material | Tool Steel |
| Package Dimensions | 6.3 x 3.82 x 1.65 inches |
| Part Number | ALRTA-19 |
| Power Source | hand_powered |
| Size | 3/8" HSS Shank |

## Images

![Assorts Radius Ball Turning Tool for Lathe – 3/8" Shank HSS Tool Bit – Turns Concave & Convex Balls – Fits 7x14 & 7x16 Mini Lathes - Image 1](https://m.media-amazon.com/images/I/61lXiQBwckL.jpg)

## Available Options

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

## Customer Reviews

### ⭐ Junk
*by A***S on December 20, 2022*

spindle the handle is connected to isn't keyed, so slips. Thats the negative part. Can be fixed with a bit of machining, but something the manufacturer didnt care about, so you shouldn't care about supporting the manufacturer. FYI issues: 1. limited to diameter. Something I didnt consider when purchasing. Hopefully that helps you make a decision. 2. Handle on bit doesn't clear my QTP top ,so had to rotate the handle on the bit which could interfere with other things or introduce a safety issue.

### ⭐⭐⭐⭐ If you need small balls, this WILL make them!
*by K***R on August 1, 2023*

The replacement for the first tool (received without a cutter bit) was complete. After I insured all screws were tight, I attached it to my lathe using a quick-change tool holder. First thing I tried was to simply turn a rounded end on a piece of Delrin plastic. It took a bit to get used to the process, but I turned a very nice half round onto the end of the plastic. I then chucked up a short length of 1/2" aluminum rod. I insured the rod end was far enough out of the chuck that the tool would not impact the chuck jaws in use. I undercut a length of the shaft from about 1/2" from the end of the rod back about an inch and turned that down to roughly 1/4 diameter. Then I set the tool horizontal to the work, touched off at the dead center of the rod. I moved the cross feed out far enough that the cutter was clear of the work. I then started the lathe and moved the bit in until it made contact with the right hand end of the work. I swung the handle left and right and knocked the edges off the work. I advanced the tool and swung the handle between the center of the end of the rod and back as far as it would go - that is, until it struck the undercut section of the rod. I continued advancing a little at a time until I was cutting the entire surface of the nicely-forming ball on the end of the shaft ! Once I had tool cutting during the entirety of the swing I stopped cutting and polished the ball and shaft with 400 grit sandpaper. The result a smooth, shiny ball about 3/8" diameter. I hadn't measured anything exactly in this test, just wanted to see if it worked. IT DOES!! Feed slowly and use enough speed to prevent chatter. I think this will work for all the small projects I may want balls for. I will try drilling and tapping the next one with 1/4-20 thread so I can screw it onto a "handle" - this is still test, try, learn mode. But think it will get lots of practical use in the future.

### ⭐⭐⭐⭐ Not the best build quality and a bit small but...
*by I***E on January 31, 2022*

Took some trial and error and a few you tube videos to learn how to use it but it does work quite nicely. I seriously doubt your gonna be turning steel with it. But I lost the ball on the end of my back gear lever and turned a new one with it out of delrin and it works really well I tried it on some aluminum and it worked but was a little chattery and the finish was so so. I haven't tried steel and probably won't

## Frequently Bought Together

- Assorts Radius Ball Turning Tool for Lathe 3/8" Shank with HSS Tool Bit
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- Mini Parting Tool Cut off Holder with 6Pcs HSS Blades for Mini Lathes 8mm Shank

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-07*