Angle Grinder Blades and Saw Wheels: What Fits Which Tool

What three numbers tell you if a wheel fits your tool?

Diameter, arbor and max RPM tell you if a wheel fits your tool. Every bonded or diamond wheel prints them, usually in one line. Take the label on our 4-1/2 in. ZIPCUT wheel: 4-1/2 x 3/64 x 7/8, Type 1, max 13,300 RPM.

• Diameter (4-1/2 in.) must match the tool's size. A bigger wheel will not fit under the guard.
• Thickness (3/64 in.) tells you the job: thin wheels (3/64 to 1/16 in.) cut, 1/8 in. wheels do both, 1/4 in. wheels grind.
• Arbor (7/8 in.) is the center hole, and it must match the spindle exactly. Never shim a 1 in. wheel onto a 5/8 in. shaft.
• Type is the shape. Type 1 is flat, for straight cuts. Type 27 has a dished center, for grinding at an angle. Type 28 is a saucer, for wide flat grinding.
• Max RPM (13,300) must be at or above the tool's no-load speed on its data plate. This is the one number that keeps a wheel in one piece.

Which wheel or blade fits each power tool?

This chart lists each common power tool with the wheel size, arbor and speed rating it needs, and the wheels we stock for it. Prices are per wheel; Walter wheels are sold by the box.

Tool	Wheel size	Arbor	Our wheels are rated	Steel and stainless	Concrete, masonry, tile
Die grinder	3 in.	3/8 in.	25,470 RPM	11L303 ZIP 1/32 in., $3.90, box of 25	—
4-1/2 in. angle grinder	4-1/2 in.	7/8 in. or 5/8-11	13,300 RPM	Cut 11T042 $5.86; stainless 11F042 $6.13; grind 08H452 $6.98 (all box of 25); flap 15Y456 $6.00, box of 10	SG-45 $12.78 (min. 2); tile PL-45 $38.53
5 in. angle grinder	5 in.	7/8 in. or 5/8-11	12,200 RPM	Cut and deburr 11T852 $7.63, box of 25	Cup wheel GCW-50 $83.06
6 in. angle grinder	6 in.	7/8 in.	10,200 RPM	Grind 08H600 $12.31; cut 11T062 $8.66 (box of 25)	—
7 in. angle grinder	7 in.	7/8 in. or 5/8-11	8,600 RPM (diamond 8,730)	Grind 08H700 $14.85; cut 11T072 $10.86 (box of 25)	SG-70 $29.14; cup wheel GCW-70 $110.45
9 in. angle grinder	9 in.	7/8 in. or 5/8-11	6,600 RPM (diamond 6,790)	Grind 08H900 $19.80; cut 11T092 $15.37 (box of 25)	DDD-90 $107.76
7-1/4 in. circular saw	7 in.	5/8 in.	8,600 RPM	11T070 $10.86, box of 25	SG-70 $29.14
12 in. abrasive chop saw	12 in.	1 in.	5,100 RPM	10Q123 $10.30; 10W123 $6.91 (box of 10)	—
14 in. abrasive chop saw	14 in.	1 in.	4,400 RPM	10Q143 $12.00; 10W143 $8.13 (box of 10)	—
14 in. dry-cut (low-speed) saw	14 in.	1 in.	1,800 RPM	Carbide 102841 66T, $193.61	—
14 in. cut-off saw, walk-behind or masonry saw	14 in.	1 in. or 20 mm	5,460 RPM	Metal and rebar CC-14 $171.57	SG-14 $76.06; KS-14 $99.51; MA-14 $133.51
10 in. tile saw	10 in.	5/8 in.	6,115 RPM	—	PL-10 $111.80

Speed ratings from Walter and ITM for the wheels listed. Prices checked on eldoradotools.com on Oct 29, 2026.

Pick your tool, what you are cutting and the job to see the wheels that match:

What is the 60,000 rule for wheel speed?

The 60,000 rule says a wheel's diameter in inches times its max RPM comes out close to 60,000. We found it by lining up the ratings on every Walter and ITM wheel we sell. A 4-1/2 in. wheel is rated 13,300 RPM (4.5 × 13,300 = 59,850). A 14 in. chop saw wheel is rated 4,400 RPM (14 × 4,400 = 61,600). The pattern holds because wheels are built for the same rim speed, about 80 meters a second, so a bigger wheel has to turn slower.

Use it as a gut check, never instead of the label: 60,000 ÷ wheel diameter ≈ the most RPM a standard wheel takes. Two kinds of wheel break the rule on purpose. Our 14 in. diamond blades and the thin 3 in. die grinder wheel are rated higher (about 76,000, or 100 m/s). The 14 in. carbide blade is rated far lower (25,200), because it is made for a slow dry-cut saw.

Here is the rule drawn against the ratings on our standard wheels, from 4-1/2 to 20 in.:

Wheel diameter	Max RPM, our wheels	Rule RPM (60,000 ÷ diameter)
4-1/2	13,300	13,330
6	10,200	10,000
7	8,600	8,570
8	7,600	7,500
9	6,600	6,670
10	6,115	6,000
12	5,100	5,000
14	4,400	4,290
16	3,800	3,750
20	3,000	3,000

One standard wheel per size: Walter for abrasive wheels, ITM for the 10 in. tile blade. The full list, with the exceptions, is below.

Wheel	Diameter	Max RPM	Diameter × RPM	Rim speed
11L303 ZIP, die grinder	3 in.	25,470	76,410	102 m/s
UT-40 ITM tuck point	4 in.	15,000	60,000	80 m/s
11T042 Walter ZIPCUT	4-1/2 in.	13,300	59,850	80 m/s
SG-45 ITM diamond	4-1/2 in.	13,300	59,850	80 m/s
11T852 Walter COMBO ZIP	5 in.	12,200	61,000	81 m/s
08H600 Walter HP XX	6 in.	10,200	61,200	81 m/s
08H700 Walter HP XX	7 in.	8,600	60,200	80 m/s
SG-70 ITM diamond	7 in.	8,730	61,110	81 m/s
11T080 Walter ZIPCUT	8 in.	7,600	60,800	81 m/s
08H900 Walter HP XX	9 in.	6,600	59,400	79 m/s
DDD-90 ITM diamond disc	9 in.	6,790	61,110	81 m/s
PL-10 ITM tile blade	10 in.	6,115	61,150	81 m/s
10Q123 Walter CHOPCUT	12 in.	5,100	61,200	81 m/s
10Q143 Walter CHOPCUT	14 in.	4,400	61,600	82 m/s
SG-14 ITM diamond	14 in.	5,460	76,440	102 m/s
102841 ITM carbide	14 in.	1,800	25,200	34 m/s
10Q163 Walter CHOPCUT	16 in.	3,800	60,800	81 m/s
10B203 Walter RIPCUT	20 in.	3,000	60,000	80 m/s

Max RPM from the maker's rating on each product (Walter, ITM); diameter × RPM and rim speed are our arithmetic.

Which angle grinder blades fit a 4-1/2 in. grinder?

A 4-1/2 in. angle grinder takes 4-1/2 in. wheels rated at least as fast as the grinder, with either a 7/8 in. plain hole or a 5/8-11 threaded hub. A typical corded 4-1/2 in. grinder such as the Bosch 1375-01 runs 11,000 RPM. Every 4-1/2 in. wheel we sell is rated 13,300 RPM, so all of them clear it.

Pick your grinder or type the speed from its plate to see which of our grinder wheel sizes are rated for it. Speed is half the check. The wheel's diameter must also match the grinder and its guard.

Grinder wheel	Our wheels in this size	Max RPM	SKU
4-1/2"	Cut, grind, flap	13,300	11T042
5"	Cut and deburr	12,200	11T852
6"	Grinding	10,200	08H600
7"	Grinding	8,600	08H700
9"	Grinding	6,600	08H900

Max RPM from Walter's rating on each wheel. Our 7 and 9 in. ITM diamond blades are rated a little higher: 8,730 and 6,790 RPM.

The 7/8 in. hole sits on the grinder's backing flange and is clamped by the lock nut. The 5/8-11 hub screws straight onto the spindle with no nut. The hub is quicker to change, and you pay for it:

	7/8 in. plain hole	5/8-11 threaded hub
How it mounts	On the backing flange, clamped by the lock nut	Screws onto the spindle; no flange or nut
Same wheel, HP XX 4-1/2 x 1/8 in.	08H452	08H457
Price per wheel	$6.98	$11.26 (61% more)
Sold in	Box of 25	Box of 10
Wheel change	Spanner wrench and spindle lock	By hand
Pick it when	You change wheels a few times a day	You swap between cut, grind and flap all day

Verdict: Buy the 7/8 in. wheel unless wheel changes eat your day.

For the full grinding-wheel choice, read Which Grinding Wheel for Angle Grinder Work. For thin wheels and stainless, read Cut Off Wheels: .045 vs 1/16 vs 1/8.

Do not put a 5 in. or larger wheel on a 4-1/2 in. grinder. It only fits with the guard off, and a 7 in. wheel is rated 8,600 RPM, slower than the grinder's 11,000.

Which chop saw blade fits a 14 in. chop saw?

A 14 in. abrasive chop saw takes a 14 in. Type 1 wheel with a 1 in. arbor, rated 4,400 RPM or faster. Both of our everyday 14 in. wheels are rated 4,400 RPM and sold in boxes of 10:

Wheel	Thickness	Per wheel	Box of 10	Pick it when
10W143 ALLSTEEL	1/8 in.	$8.13	$81.30	General steel: angle, flat bar, threaded rod
10Q143 CHOPCUT	3/32 in.	$12.00	$120.00	Solids and stainless tubing; thinner, so less load on a cordless or small saw (Walter's description)

A carbide metal-cutting blade is a different saw. Our 14 in. ITM carbide blade, 102841, is rated 1,800 RPM, so it belongs only on a low-speed dry-cut saw. Never put it on an abrasive chop saw. The full comparison is in Metal-Cutting Circular Saw Blades.

On a data center floor where hot work is limited, a portable band saw makes a cold cut with no sparks. See Portable Band Saw Blade Sizes for the blade that fits your saw.

What blade fits a 10 in. tile saw?

A 10 in. wet tile saw takes a 10 in. diamond blade with a 5/8 in. arbor. Ours is the ITM PL-10: turbo mesh rim, 0.063 in. kerf, rated 6,115 RPM, $111.80. It cuts porcelain, ceramic, granite and marble, wet or dry. The rim types and which saw takes which are covered in Diamond Blades: Segmented, Turbo, Continuous Rim.

What blade fits a walk-behind or cut-off saw?

A 14 in. walk-behind saw, masonry saw or gas cut-off saw takes a 14 in. diamond blade with a 1 in. arbor. Most handheld cut-off saws use 20 mm. Our 14 in. ITM blades fit both: they have a 1 in. hole with a 20 mm bushing, and they are rated 5,460 RPM.

Blade	Built for	Price
SG-14 segmented	Everyday concrete and block	$76.06
KS-14 heavy duty	Reinforced concrete, long days on a big saw	$99.51
MA-14 multi-material, made in the USA	Concrete, block, asphalt	$133.51
CC-14 demo rescue	Steel, cast iron, rebar, pier pipe, PVC	$171.57

Foundation crews cutting a stem wall and then a pier pipe can keep one SG-14 and one CC-14 on the truck. The Foundation Repair Tools guide lists the rest of the kit.

How do you change an angle grinder blade, and which way does the flange go?

You change an angle grinder blade by unplugging the grinder, locking the spindle, and swapping the wheel between the backing flange and the lock nut. Which way the nut faces depends on the wheel.

1. Unplug the grinder or pull the battery.
2. Hold the spindle lock and turn the wheel until it catches.
3. Loosen the lock nut with the spanner wrench and take off the old wheel.
4. Check the new wheel's label: same diameter as the grinder, max RPM at or above the plate.
5. Seat the wheel on the backing flange. For a thin cut-off wheel, turn the lock nut's flat face toward the wheel. For a 1/4 in. grinding wheel, the raised center faces the wheel so it fills the hole.
6. Snug the nut, release the lock, set the guard between you and the wheel, and run it for a minute at arm's length before you touch work.

Hubbed wheels (5/8-11) skip the flange and nut entirely. Take both off and screw the wheel onto the spindle by hand.

What goes on the truck, by trade?

These three kits match the jobs our customers buy for most. Each one links to a deeper guide.

Metal fabrication

• Cut: 11T042, $5.86
• Cut and deburr in one: 11T842, $6.95
• Grind: 08H452, $6.98
• Blend: 15Y456 flap disc, $6.00 (flap disc vs grinding wheel)
• Clean: wire cup brushes
• Chop: 10W143, $8.13

Data center

• Strut and threaded rod: 10Q143, $12.00
• Stainless liquid-cooling lines: 11F042 ZIP STAINLESS, $6.13
• Cold cuts where hot work is limited: band saw blades
• Weld prep: sanding discs for metal

Foundation repair

• Slab and stem wall: SG-14, $76.06
• Pier pipe and rebar: CC-14, $171.57, or a 10/14 TPI band saw blade
• Strap prep: GCW-70 cup wheel, $110.45
• Tuck pointing: UT-40, $36.06
• Drilling the anchors: SDS Plus vs SDS Max

FAQ

Can I put a 5 in. wheel on a 4-1/2 in. angle grinder?

No. It only fits with the guard removed, and our 5 in. wheels are rated 12,200 RPM against 13,300 for 4-1/2 in. Buy the wheel your grinder is sized for.

Can I use a 7/8 in. wheel on a grinder with a 5/8-11 spindle?

Yes. That is the normal setup. The 7/8 in. hole sits over the backing flange's raised center and the lock nut clamps it.

What arbor size is a 14 in. chop saw?

1 in. Every 12, 14 and 16 in. chop saw wheel we sell has a 1 in. arbor.

Will a 14 in. concrete blade fit a gas cut-off saw?

Yes, if it has a 20 mm bushing. Our SG-14, KS-14, MA-14 and CC-14 come with a 1 in. hole and a 20 mm bushing, rated 5,460 RPM.

Can I run a diamond blade on an angle grinder?

Yes, if the diameter matches and the blade is rated for the grinder's speed. Our 4-1/2 in. ITM diamond wheels are rated 13,300 RPM, the same as our abrasive wheels.

How do I tell my tool's RPM?

Read the data plate on the motor housing. It lists the no-load speed, the fastest the spindle turns. Your wheel's max RPM must be that number or higher.

Browse every size in our abrasive wheels collection, or go straight to wheels for angle grinders, cut-off saws, tile saws or walk-behind saws.

Not sure what fits? Call our team at (833) 4-ETOOLS or email sales@eldoradotools.com with your tool's model number and plate speed.