Anybody know the number(s) of the thickest (most heavy duty) dremel type cutoff wheel(s) are? Even the shorter diameter ones.

Hello, The thickest cut-off wheel we provide is .0625 (1.6 mm) and is part #540. The next thickest would be part numbers 426,456,506CU,EZ426,EZ456 and EZ476. These are all .045 thickness (1.1 mm). Hope this helps and have a great day!

Can it be used for cutting plywood, does it leave clean edges?

You can cut plywood. I do so when cutting model airplane parts from 1/16 - 1/4" birch plywood. To prevent 'fraying' around your cuts, first lay down masking tape over your projected cut line.

Do these have a longer life or more durable than the Dremel #426 fiberglass reinforced cut offwheels . I usually use for cutting small screws and bolt

The 426 will be more durable and have a longer life. That is what the fiberglass does.

What diameter size are these cut off wheels and can it be used for a drill Master rotary tool?

There15/16” diameter.. 25 thousandths “ thick.. 1/8” hole in center.. any high speed cut off tool these will work.. the 409 are THIN.. 406 ate a bit thicker.

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Dremel 420 Cut-Off Wheel, 15/16" (23.8 mm) Diameter, 0.40” (1.0 mm) disc Thickness, Cutting Rotary Tool Accessory (20 Pieces)

Dremel 420 Cut-Off Wheel, 15/16" (23.8 mm) Diameter, 0.40” (1.0 mm) disc Thickness, Cutting Rotary Tool Accessory (20 Pieces)

Product ID: 54961182

Details

Brand
Dremel
Compatible devices
Angle Grinder
Grit material
Emery
Grit type
Very Fine
Product dimensions
24L x 24W

📏23.8 mm diameter precision

🪓0.40” (1.0 mm) ultra-thin cutting disc

⚙️35000 RPM max speed

Description

🛠️ Slice through your projects with precision and power — don’t get left behind!

PERFECT FIT EASY USE - Standard 1/8” shank fits all Dremel rotary tools—no extra adapters needed, just plug and play.
PRECISION CUTTING POWER - Turn your rotary tool into a high-speed cutting machine with 35,000 RPM max speed for flawless, clean cuts every time.
ENGINEERED FOR PRECISION - At 23.8 mm diameter and 1.0 mm thickness, these wheels deliver razor-thin, accurate cuts ideal for detailed DIY and professional tasks.
VERSATILE MATERIAL COMPATIBILITY - Effortlessly slice through metal, thin wood, plastic, and even rusted bolts with a durable emery-steel blade.
BULK PACK FOR CONTINUOUS PROJECTS - 20 high-quality cut-off wheels ensure you never run out mid-project, keeping your workflow smooth and uninterrupted.

The Dremel 420 Cut-Off Wheel set includes 20 ultra-thin, 23.8 mm diameter emery-steel discs designed for high-speed rotary tools. Compatible with all Dremel tools featuring a 1/8” shank, these wheels cut through metal, wood, and plastic with pinpoint accuracy at speeds up to 35,000 RPM. Ideal for professionals and DIYers seeking reliable, precise cutting performance in a versatile accessory pack.

Specifications

ASIN	B00004UDH3
Best Sellers Rank	152,265 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 445 in Cut-Off Wheels 19,716 in Power Tools (DIY & Tools)
Brand	Dremel
Compatible Devices	Angle Grinder
Compatible Material	Metal, Wood, Plastic
Compatible devices	Angle Grinder
Construction Type	Grind
Customer Reviews	4.6 out of 5 stars 1,465 Reviews
Global Trade Identification Number	00080596004200
Grit Material Type	Emery
Grit Number	420
Grit Type	Very Fine
Grit material	Emery
Grit type	Very Fine
Included Components	Unit^Instruction Guide
Industry Standard Identifier	0080596004200, 080596004200
Item Diameter	23.8 Millimetres
Item Dimensions	24 x 24 x 1 millimetres
Item Dimensions L x W	24L x 24W millimetres
Item Thickness	0.04 Hundredths-Inches
Item Weight	18 g
Item thickness	0.04 Hundredths-Inches
Manufacturer	Dremel
Manufacturer Part Number	420
Material	emery,steel
Max Rotational Speed	35000 RPM
Model Number	420
Number of Items	20
Product dimensions	24L x 24W millimetres
Recommended Uses For Product	Cutting, Polishing
Set Name	20-Piece Set
UPC	080596004200
Unit Count	1.0 count

Reviews

J**G

Great for my purposes.

Excellent for small jobs on the appropriate materials.

22.05.2019

A**R

Exactly as described

I use these during my radio controlled aircraft building.

22.09.2018

S**L

Five Stars

Arrived safe

9.07.2018

L**S

Peça muito útil para quem tem a mini-retífica Dremel

Os discos são para cortar metal. Também cortam plástico e madeira. Eles se desgastam à medida que cortam materiais mais duros. Vale a pena ter um estoque em casa. A embalagem do produto é ideal para guardá-los junto à retífica. Chegaram bem embalados e no prazo.

6.05.2024

R**S

Good

18.06.2022

A**R

Cumplen bien su función

En general los uso para rebanar tornillos demasiado largos y funcionan adecuadamente. Se gastan poco a poco por eso me conviene un pequeño paquete como este.

20.01.2021

K**A

Works great for small jobs

I was using these to cut various steel objects - PC card brackets and some long bolts. The bolts cut very quickly with these. The trick is to not apply too much pressure -- let the speed do the cutting for you, and the job goes quicker because you don't need to keep replacing the cutting wheel. I was able to do one or two jobs per wheel fairly regularly, and that seemed like excellent value for money when each wheel cost about a quarter a pop. I'm super pleased with these and will be using them again and again as I have need.

12.05.2019

L**O

Muy buen producto

Excelente producto para trabajos pequeños! Si se utiliza con su debido cuidado funcionan de maravilla Cortan plástico, madera, fibra de vidrio, fibra de carbono, aluminio e incluso algunos tipos de metal más duro que el aluminio

22.10.2019

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