Can this be used in a boring bar holder on a milling machine, or is it only for a lathe?

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.

is this actually a 3/4" or a 20mm, i need a 3/4.

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

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432

3/4" Lathe Internal Boring Bar Turning Tool Holder S20R-MWLNR08 with Indexable Carbide Turning Insert WNMG432

Product ID: 170567829

💎Carbide TiN-coated inserts for ultra durability

🔩High-quality alloy steel with nickel coating

⚙️3/4" shank diameter for precision fit

₩109667

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Description

🔧 Elevate your machining game with precision that commands respect!

COMPLETE PRO KIT - Includes 1 boring bar, 10 carbide inserts, and a wrench for instant setup
VERSATILE 3 4 SHANK - Fits standard lathes with 20mm diameter and 8" length for broad compatibility
HIGH PERFORMANCE CUTTING - Handles feeds up to .035" at 280 RPM with consistent accuracy on aluminum
OPTIMIZED CARBIDE INSERTS - TiN-coated WNMG080408 inserts deliver smooth finishing & semi-finishing
PRECISION ENGINEERED ALLOY STEEL - Nickel-coated for unmatched toughness and wear resistance

The S20R-MWLNR08 Lathe Internal Boring Bar features a durable nickel-coated alloy steel body paired with 10 TiN-coated carbide inserts (WNMG080408) designed for finishing and semi-finishing. With a 3/4" (20mm) shank diameter and 8" length, it offers robust wear resistance and precise cutting performance, ideal for professional-grade internal turning tasks on CNC lathes.

Specifications

ASIN	B07Z9XZNX8
Best Sellers Rank	#43,254 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 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	8.98 x 4.33 x 2.24 inches

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

₩109667

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews