You would have to remove the guard. And that is a very bad idea if you're a fan of having your fingers remain attached to your hands. I would go and buy the appropriate size wheel for the grinder you have. Answer from uswforever on reddit.com
Amazon
amazon.com › 4-grinding-disc › s
Amazon.com: 4 Grinding Disc
DEWALT Grinding Wheel, General Purpose for Metal, 4-1/2-Inch x 1/4-Inch x 5/8-Inch (DW4523) · SALI 25 Pack 4-1/2 Inch Grinding Wheels for General Purpose Metal & Stainless Steel, Aluminum Oxide Grinding Disc for Angle Grinder, Depressed Center 4.5" * 1/4" * 7/8"(115 * 6.0 * 22.2 mm) · SALI ...
Bad Dog Tools
baddogtools.com › home › shop now › hdii cutting & grinding › 4" hdii - endless cutting + grinding wheel
Bad Dog Tools 4" HDII Cutting Wheel: Endless Grind & Cut
4" HDII - ENDLESS Cutting + Grinding Wheel
Bad Dog 4″ HDII – The Hard-to-Find Size That Does It All · We know 4" grinding wheels are getting harder to find—but this one’s worth the hunt. The Bad Dog 4″ HDII is the all-in-one cutting, sanding, and grinding solution for folks running smaller angle grinders. Built with diamond grit on both the face and edge, it gives you maximum versatility without the need to change wheels mid-job. · Whether you're working with masonry, metal, porcelain tile, PVC, wood, or composite materials, the 4" HDII powers through it all. And because it’s built on a solid steel core, it won’t explode like fiberglas
Price $169.95
Can I use a 5 inch cutting disk in a 4-inch grinder?
You would have to remove the guard. And that is a very bad idea if you're a fan of having your fingers remain attached to your hands. I would go and buy the appropriate size wheel for the grinder you have.
More on reddit.com 9
1
February 6, 2020Can I use a 4 1/2 grinding disk on a 5 inch angle grinder?
So long as the hole is sized correctly for your grinder, and your grinder won't exceed the speed limit of the disc, they should be fine. More on reddit.com
10
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August 14, 2016Can you use 4" wheels on a 7" grinder?
What I've heard is you can't go the other way. Can't put a 7" disc on a smaller grinder because they spin faster than the disc is designed for. More on reddit.com
9
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September 26, 2023Question what size hole grinding disc do I get for a milwaukee fuel 4 1/2 grinder model number 2780-20
Looks like a standard 5/8-11 More on reddit.com
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July 13, 2019Will the HDII fit my grinder?
Absolutely. The industry standard for grinders is as follows: Rotary Tools (i.e. Dremel TM) - 1/8" 3" Cut off tools and Die Grinder - 1/4" & 3/8” 4" Angle Grinder - 5/8" 4-1/2", 5”, 6", 7" Angle Grinder - 7/8" arbor flange for a 5/8\" coarse arbor shaft. At Bad Dog, we find that an HDII with a 7/8\" arbor flange runs truest because it is a more precise fit. The 4-1/2" and 6" Flange wheel use the 5/8\" coarse thread which is standard on ALL grinders. Call us at 800.252.1330 if you have any questions.
baddogtools.com
baddogtools.com › home › shop now › hdii cutting & grinding › 4" hdii - endless cutting + grinding wheel
Bad Dog Tools 4" HDII Cutting Wheel: Endless Grind & Cut
How safe is HDII compare to other wheels?
As safe as they get! Cut-off wheels can be some of the most dangerous tools in a shop. We are not telling you that you don’t need to be wearing safety when using our wheel, however, the 46 diamond grit is embedded on a hard steel plate to ensure that the wheel will not fly apart on you.
baddogtools.com
baddogtools.com › home › shop now › hdii cutting & grinding › 4" hdii - endless cutting + grinding wheel
Bad Dog Tools 4" HDII Cutting Wheel: Endless Grind & Cut
What won't the HDII cut?
Wood: It will shape wood well but burns when cutting. Glass: The HDII is too aggressive and leaves a jagged edge.
baddogtools.com
baddogtools.com › home › shop now › hdii cutting & grinding › 4" hdii - endless cutting + grinding wheel
Bad Dog Tools 4" HDII Cutting Wheel: Endless Grind & Cut
Videos
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Empire Abrasives
empireabrasives.com › home › bonded cutting & grinding › grinding wheels › 4" x 1/4" x 5/8" grinding disc t27
4" x 1/4 x 5/8" Black Hawk Metal Grinding Disc Type 27
4” x 5/8” Grinding Disc by ... These 4 inch grinding wheels for angle grinders are ideal for use on ferrous metals, steel, rebar, iron pipe, bar stock and metal tubing....
Call 800-816-3824
Address 85B Hoffman Ln, 11749, Islandia
The Home Depot
homedepot.com › p › DEWALT-4-in-x-1-4-in-x-5-8-in-General-Purpose-Metal-Grinding-Wheel-DW4419 › 202579894
DEWALT 4 in. x 1/4 in. x 5/8 in. General Purpose Metal Grinding Wheel DW4419 - The Home Depot
DEWALT 4 in. x 1/4 in. x 5/8 in. General Purpose Metal Grinding Wheel DW4419
Fiber-reinforced bonded abrasive grinding wheel provides a quick way to grind and shape metals such as steel, aluminum, iron, copper, brass, pipe and nonferrous materials. Additionally, the range masonry wheels safely cut brick, stone, marble and concrete block.
Price $2.14
Harbor Freight
harborfreight.com › search
Search Results For "4 Inch Grinding Disc"
Harbor Freight buys their top quality tools from the same factories that supply our competitors. We cut out the middleman and pass the savings to you!
Wurth USA
wurthusa.com › Abrasives-Cutting-Drilling › Cutting-Grinding › Grinding-Discs-Wheels › Grinding-Disc---Blue-Nylon---4-Inch-Without-Hub › p › 15852140
Grinding Disc - Blue Nylon - 4 Inch Without Hub | Wurth USA
Grinding Disc - Blue Nylon - 4 Inch Without Hub
This disc is perfectly sized for small to medium grinding tasks, fitting most standard angle grinders and rotary tools · The lightweight construction and easy-to-mount design enable quick and effortless changes, allowing users to switch out ...
Price $37.15
Milwaukee Tool
milwaukeetool.com › products › 49-94-4520
4-1/2" x 1/4" x 7/8" Grinding Wheel (Type 27) | Milwaukee Tool
Grinders · Cutting · Band Saws · Sanders & Polishers · Nibblers & Shears · Magnetic Drills · SAWZALL® Reciprocating Saws · View All — SAWZALL® Reciprocating Saws · SAWZALLS® · HACKZALLS® · Specialty Tools · View All — Specialty Tools · Applicators ·
Amazon
amazon.com › Best-Sellers-Angle-Grinder-Wheels › zgbs › industrial › 2665572011
Amazon Best Sellers: Best Angle Grinder Wheels
Wohenhao Dust Shroud for Angle Grinder 4.5-5 inch + 2 PCS Diamond Grinding Cup Wheel 5 inch + Replacement Brush, Universal Surface Grinding Shroud Kit for Various Surfaces ... BLEKOO 4PC Angle Grinder Wood Carving Disc Set, for 4" or 4 1/2" Angle Grinder with 5/8" Arbor, Wood Shaper Carving ...
Quora
quora.com › How-can-I-use-a-5-inch-cutting-disc-on-a-4-inch-angle-grinder
How to use a 5-inch cutting disc on a 4-inch angle grinder - Quora
4″(100mm), 4.5″ (115mm) and 9″ (210mm). You cannot use a 4″ wheel on a 4.5″ grinder or vice versa because the hole in the centre of the disc is a different diameter. However, many 9″ discs have the ...
Reddit
reddit.com › r/metalworking › can i use a 5 inch cutting disk in a 4-inch grinder?
r/metalworking on Reddit: Can I use a 5 inch cutting disk in a 4-inch grinder?
February 6, 2020 -
The safety guard will have to be removed but can it be done?
Top answer 1 of 6
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You would have to remove the guard. And that is a very bad idea if you're a fan of having your fingers remain attached to your hands. I would go and buy the appropriate size wheel for the grinder you have.
2 of 6
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Removing the safety guard is BAD.
But what is worse, is the speed of the outside edge of the wheel. 4 inch grinders spin at a certain RPM, and 4 inch disks are capable of handling that. 5 inch disks can’t spin as fast without breaking into pieces and flying everywhere. So if your 5 inch disk goes too fast, it explodes. And you don’t even have a guard on.
I STRONGLY advise you to get a suitable disk and save yourself a potentially lethal incident.
You probably won’t even die, just end up hurt badly. I give it a 0/10, do not recommend.
Amazon
amazon.com › Best-Sellers-Grinding-Discs › zgbs › industrial › 2665574011
Amazon Best Sellers: Best Grinding Discs
Konvixon 11PCS Wood Carving Disc Set for 4" or 4 1/2" Angle Grinder, Stump Tool Grinding Wheel Disc with 5/8" Adapter Ring, Woodworking Grinder Attachment for Cutting Shaping Carving Sanding Polishing ... NuoDunco 15Pcs 180# 320# 600# Scour Flap Disc 4 1/2 Inch Angle Grinder Attachment for Metal & Wood Scouring Pads Polishing Wheel Sanding Disc Paint Rust Remover
Diablo Tools
diablotools.com › explore › cut-off-grinding-discs
Cut-Off & Grinding Discs - Diablo Tools
Learn how Diablo's cut-off & grinding discs are the best in the world, redefining cutting with their quality and performance.
Amazon
amazon.com › 4-inch-cutting-wheel › s
Amazon.com: 4 Inch Cutting Wheel
Cut Off Wheels 52 Pack,4 1/2 Inch,0.45 USD/Pack,Metal and Stainless Steel Cutting Wheel for Angle Grinder,Ultra Thin Cut-Off Wheel Cutting Disc (52 PCS 4-1/2 x .045 x 7/8 inch Cut Off Wheels) · After viewing product detail pages, look here to find an easy way to navigate back to pages you ...
Tractor Supply Co.
tractorsupply.com › home › tools › power tool accessories › sander & grinder attachments › grinding discs
Grinding Discs at Tractor Supply Co.
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eBay
ebay.com › 4 inch grinding wheel
4 inch grinding wheel products for sale | eBay
90 Inch Tv · Air Bearing In Metalworking Grinding Tooling · Aluminum Grinding Wheel · Angle Grinder Adapter In Power Grinding Wheels & Accessories · Angle Grinder Blade In Power Grinding Wheels & Accessories · Angle Grinder Disc In Power Grinding Wheels & Accessories ·
Experttoolsworld
experttoolsworld.com › product › smt-steel-grinding-disc-4-inch-100mm
SMT Steel Grinding Discs (Original)
August 29, 2025 - Buy SMT Power Tools, Hand Tools, Cutting Tools & Industrial quality hardware Store. Pakistan’s No.1 trusted store for SMT tools equipment & Supplies. Fast Shipping | Competitive Prices | 100% Genuine SMT Products.
eBay
ebay.com › business & industrial › cnc, metalworking & manufacturing › metalworking supplies › abrasives › abrasive wheels › cup grinding wheels
4 inch grinding disc Metal, Stainless Steel, Cutting Discs Blade Angle Grinding | eBay
4 inch grinding disc Metal, Stainless Steel, Cutting Discs Blade Angle Grinding
4x.045x5/8 inch · Wheel Diameter · 4 in · Abrasive Material · Carbon Steel · Category · About this seller · J · Joined Oct 2019 · Seller's other itemsContact · Save seller · No feedback yet · Back to home pageReturn to top · Industrial ...
Price $500.00
Harbor Freight
harborfreight.com › home › power tools
Grinding & Cutting Wheels - Harbor Freight Tools
We also offer wire, abrasive wheels, and brushes that help you achieve a smooth and polished finish on your workpiece. Our bench grinder wheels range from 3 inches to 8 inches and are ideal for sharpening tools, removing rust, and polishing metals. Our flap discs and carving discs help you ...
The Home Depot
homedepot.com › p › DIABLO-4-1-2-in-40-Grit-Steel-Demon-Grinding-and-Polishing-Flap-Disc-with-Type-29-Conical-Design-DCX045040N01F › 202830903
DIABLO 4-1/2 in. 40-Grit Steel Demon Grinding and Polishing Flap Disc with Type 29 Conical Design DCX045040N01F - The Home Depot
DIABLO 4-1/2 in. 40-Grit Steel Demon Grinding and Polishing Flap Disc with Type 29 Conical Design DCX045040N01F
Diablo's 40-Grit Steel Demon Grinding and Polishing Flap Disc combines two steps in one by simultaneously grinding and polishing. It delivers fast material removal. Use this flap disc with angle grinders.
Price $9.77
Bosch Power Tools
boschtools.com › bosch professional accessories › cutting, grinding & brushing › grinding discs
Grinding Discs
Bosch Angle Grinder Discs deliver efficient and professional metal grinding performance. Get smooth finishes on most metallic materials with high-quality aluminum oxide abrasive grain construction.