---
product_id: 170567829
title: "3/4\" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432"
brand: "aszlbym"
price: "€ 89.75"
currency: EUR
in_stock: true
reviews_count: 13
category: "Aszlbym"
url: https://www.desertcart.sk/products/170567829-3-4-lathe-internal-boring-bar-turning-tool-holder-s20r
store_origin: SK
region: Slovakia
---

# TiN-coated carbide inserts for durability High-quality alloy steel with nickel coating 3/4" shank diameter for precision fit 3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432

**Brand:** aszlbym
**Price:** € 89.75
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your machining game with precision and power!

## Quick Answers

- **What is this?** 3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432 by aszlbym
- **How much does it cost?** € 89.75 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/170567829-3-4-lathe-internal-boring-bar-turning-tool-holder-s20r)

## Best For

- aszlbym enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Nickel-coated alloy steel bar delivers unmatched toughness and wear resistance for heavy-duty use.
- • **Ready to Work:** Complete kit includes 1 boring bar, 10 CNC inserts, and a wrench—everything you need to start machining.
- • **Precision Perfected:** 3/4" (20mm) shank diameter ensures exact internal boring for flawless finishes.
- • **Cutting-Edge Carbide:** TiN-coated WNMG080408 inserts provide superior hardness and low friction for smooth, precise cuts.
- • **Versatile Performance:** Ideal for finishing and semi-finishing on aluminum and other metals, supporting high-speed feeds without compromise.

## Overview

The 3/4" Lathe Internal Boring Bar S20R-MWLNR08 paired with TiN-coated WNMG432 carbide inserts offers professional-grade durability and precision. Crafted from nickel-coated alloy steel, this tool holder kit includes 10 indexable inserts and a wrench, designed for high-accuracy internal turning and finishing on metals like aluminum. Engineered for toughness and wear resistance, it supports high feed rates and delivers consistent, smooth cuts—perfect for millennial managers demanding efficiency and reliability in their workshop.

## Description

ASZLBYM 3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432: desertcart.com: Industrial & Scientific

Review: Mighty bar - It works. Had a starter bore size of 1.755 and had no problems. Even took a .035 feed (280 rpm) rate cut with no problem. I was cutting aluminum 6061. After the 3rd pass, I dialed it Bach to .02. Left a deep .01 chip groove. I was roughing as well and testing it out. But it.
Review: Good quality boring bar - Good quality, heavy boring bar. Bought this to build a large fly cutter. (it has to be used in reverse for this application)

## Features

- [Package Included]: 1pc S20R－MWLNR08 boring bar + 10pcs WNMG080408 CNC inserts + 1pcs wrench
- [S20R－MWLNR08 boring bar]: The turning tool bar is made of high-quality alloy steel with Nickel Cotated, good toughness, high hardness, strong wear resistance, durable.
- [WNMG080408 CNC inserts]:Inserts made of carbide, coated with TiN, for finishing and semi-finishing work, with high hardness, low friction coefficient, good wear resistance and chemical stability for more solidity and precise positioning.
- [Product specifications]: Cutter direction:Positive cutter, right . Size:Shank diameter 3/4“/20 mm, length 8”/200 mm.platen:HL1810, spanner L3.
- Our company specializes in providing customers with various indexable CNC inserts for high-precision turning, milling, drilling, grooving and threading and supporting high-precision cutting tools.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Z9XZNX8 |
| Best Sellers Rank | #48,801 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Turning Inserts |
| Date First Available | October 18, 2019 |
| Item Weight | 1.19 pounds |
| Item model number | S20R-MWLNR08 + WNMG432 |
| Manufacturer | Xuzhou bai yi metal Technology Co., Ltd |
| Package Dimensions | 12.32 x 3.94 x 2.24 inches |

## Images

![3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432 - Image 1](https://m.media-amazon.com/images/I/61SYCgNpKGL.jpg)

## Questions & Answers

**Q: Can this be used in a boring bar holder on a milling machine, or is it only for a lathe?**
A: If you are asking if it can be used in a boring head the answer is no. As this is a right-hand boring bar and you would have to run the machine in reverse to get it to cut. If you ran it in reverse without some sort of mod to the boring head the head would unscrew from the shank as soon as you began to cut causing a spectacular crash. You need a left-hand bar. With that you can run in forward with no worries.

**Q: is this actually a 3/4" or a 20mm, i need a 3/4.**
A: 3/4'' is the size of the shank itself. I don't think it would be a mm bigger as most common lathe/mill tools are inch instead of mm

## Customer Reviews

### ⭐⭐⭐⭐⭐ Mighty bar
*by T***L on October 18, 2025*

It works. Had a starter bore size of 1.755 and had no problems. Even took a .035 feed (280 rpm) rate cut with no problem. I was cutting aluminum 6061. After the 3rd pass, I dialed it Bach to .02. Left a deep .01 chip groove. I was roughing as well and testing it out. But it.

### ⭐⭐⭐⭐⭐ Good quality boring bar
*by M***E on February 4, 2026*

Good quality, heavy boring bar. Bought this to build a large fly cutter. (it has to be used in reverse for this application)

### ⭐⭐⭐⭐⭐ Great
*by R***N on December 17, 2025*

Awesome boring bar

## Frequently Bought Together

- ASZLBYM 3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432
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- ASZLBYM 30PCS CNMG 431 + WNMG 431 + TNMG 331 CNC Lathe Indexable Solid Carbide Turning Insert Blade for Lathe Turning Tool Holder for The Finishing of Steel

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-02*