---
product_id: 222461926
title: "GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3\" 3/8\" 1/2\" 91° Turning Holder Boring Bars"
brand: "gbj"
price: "A$53"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/222461926-gbj-20pcs-tcmt21-51-turning-inserts-tcmt110204-tcmt21-51-carbide
store_origin: AU
region: Australia
---

# 3/32" thick, 1/64" radius precision Wear & heat resistant for longer life Solid carbide with tin coating GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars

**Brand:** gbj
**Price:** A$53
**Availability:** ✅ In Stock

## Summary

> ⚙️ Cut smarter, last longer — the pro’s choice for precision turning!

## Quick Answers

- **What is this?** GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars by gbj
- **How much does it cost?** A$53 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/222461926-gbj-20pcs-tcmt21-51-turning-inserts-tcmt110204-tcmt21-51-carbide)

## Best For

- gbj enthusiasts

## Why This Product

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

## Key Features

- • **Ready-to-Use Bulk Pack:** 20 high-quality inserts neatly organized in two durable plastic cases for easy storage and access
- • **Versatile Compatibility:** Perfectly fits S08K/S10K-STFCR11 lathe turning tool holders for seamless integration
- • **Durability Meets Performance:** Vacuum hardened inserts resist heat and wear, minimizing downtime and tool replacement
- • **Premium Carbide Construction:** Solid carbide with tin coating ensures faster cutting speeds and superior wear resistance
- • **Precision Engineered Geometry:** 7° relief angle & triangle shape for flawless aluminum, steel & stainless steel turning

## Overview

The GBJ 20pcs TCMT21.51 Turning Inserts are solid carbide, tin-coated triangle inserts designed for high-performance turning and finishing on aluminum, steel, and stainless steel. Featuring a 7° relief angle and 3/32" thickness with a 1/64" radius, these wear- and heat-resistant inserts fit S08K/S10K-STFCR11 lathe holders, delivering faster cutting speeds and extended tool life. Packaged in two sturdy plastic boxes, this set ensures professional-grade precision and durability for demanding machining tasks.

## Description

Full description not available

## Features

- 🎄 Size: TCMT 21.51(TCMT110204), 3/32" Thick, 1/64" Radius, 7 degrees relief angle,triangle inserts for aluminum,steel and stainless steel;
- 🎄 Material: TCMT21.5 inserts are made of solid carbide with tin coated, offer long tool life and faster cutting speed, low friction coefficient, good wear resistance
- 🎄 Application: tcmc21.51 carbide inserts are used for turning and finishing on stainless iron parts. Suitable for For S08K/S10K-STFCR11 Lather Turning Tool Holder
- 🎄 Advantage: the carbide blades tcmt110204 has feature of wear-resistant and heat-resistant, not easy to stick to the holders or workpieces or break up.Vacuum hardening, exquisite craftsmanship, easy cutting.
- 🎄 Package includes: 20pcs TCMT110204 / TCMT 21.51 Gold carbide inserts , involved in two good quality plastic boxes.

## Images

![GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars - Image 1](https://m.media-amazon.com/images/I/61gX9GJ4K3L.jpg)
![GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars - Image 2](https://m.media-amazon.com/images/I/41jVq7z5JiL.jpg)
![GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars - Image 3](https://m.media-amazon.com/images/I/61mzoyxuGBL.jpg)
![GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars - Image 4](https://m.media-amazon.com/images/I/518GtKoHm4S.jpg)
![GBJ 20pcs TCMT21.51 Turning Inserts TCMT110204 TCMT21.51 Carbide Inserts TCMT Insert S08K/S10K/S12M-STFCR11 1/3" 3/8" 1/2" 91° Turning Holder Boring Bars - Image 5](https://m.media-amazon.com/images/I/61WWijBe4dL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Off shore carbide works fine for me
*by C***H on July 14, 2025*

As a hobby machinist this was a big step up for me. The inserts cut well enough and have lasted well enough for me. Finish was good and was better with higher speeds.

### ⭐⭐⭐⭐⭐ I would buy these again.
*by A***R on April 10, 2025*

So far these inserts work very good. They are giving me a very good finish and they look like theywill hold up well.

### ⭐⭐⭐⭐ Good for a while.
*by L***Z on November 3, 2021*

They cut well, but far more prone to breaking than any of my other carbide bits. The first one I used broke just tightening the screw.For the money, they’re not bad. If there weren’t so many for cheap, I’d have probably been angry. Just plan on turning them 60 degrees, and swapping them often.

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-27*