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

3 4 Lathe Internal Boring Bar Turning Tool Holder S20r

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

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₩98091

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

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Description

⚙️ Elevate Your Lathe Game with Precision & Power!

ALLOY STEEL STRENGTH MEETS SLEEK DESIGN - Nickel-coated alloy steel boring bar combines toughness and corrosion resistance with a professional finish.
PRECISION ENGINEERED FOR MILLENNIAL MAKERS - 3/4" shank diameter ensures seamless integration with your lathe setup for flawless internal boring.
BUILT IN CHIP BREAKER FOR EFFORTLESS CUTTING - Positive rake angle and chip breaker design reduce build-up and chipping, boosting your productivity and precision.
VERSATILE FINISHING SEMI FINISHING EXCELLENCE - Optimized for finishing and semi-finishing steel parts, ensuring smooth, precise cuts every time.
UNMATCHED DURABILITY WITH TITANIUM NITRIDE COATING - 10 indexable carbide inserts coated with TiN deliver superior wear resistance and low friction for longer tool life.

The S20R-MWLNR08 Lathe Internal Boring Bar set includes a 3/4" nickel-coated alloy steel tool holder and 10 TiN-coated carbide inserts designed for high-precision finishing and semi-finishing of steel parts. Engineered for durability and low friction, this professional-grade tool enhances cutting efficiency with a positive rake angle and built-in chip breaker, making it ideal for millennial professionals seeking reliable, long-lasting machining performance.

Specifications

ASIN	B07Z9XZNX8
Best Sellers Rank	#45,231 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

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₩98091

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

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TrustScore 4.5 | 7,300+ reviews

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

Description

Specifications

Common Questions