Best Chicago Pneumatic Power Grinders in 2026

Daisy
Last Updated: Feb 8, 2026

At a Glance: Our Top Picks for Chicago Pneumatic Power Grinders

Ryobi OEM ZRP421 One+ 4-1/2" Angle Grinder G4
#TOP1
Ryobi Oem Zrp421 One+ 4-1/2" Angle Grinder G4
9.8
PM SCORE
3pcs Grinder Flange Angle Wrench Spanner Metal Lock Nut for Compatible with Dewalt Milwaukee Makita 193465-4 Bosch Black & Decker Ryobi 4.5" 5" 5/8-11
#TOP2
3Pcs Grinder Flange Angle Wrench Spanner Metal Lock
9.6
PM SCORE
KOWOOD 4-1/2" 5" 5pcs Angle Grinder Flange Nuts with Spanner Compatible for Dewalt Makita Angle Grinder Flange with 5/8"-11 threaded shaft
#TOP3
Kowood 4-1/2" 5" 5Pcs Angle Grinder Flange Nuts
9.6
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Chicago Pneumatic Power Grinders of 2026

Market Overview
Chicago Pneumatic Power Grinders Reviewed
  • Reviews Analyzed: 2904 Items
  • PM Avg. Rating: 6.0 / 10
25 Products Evaluated
  • Highest Price: $222.45
  • Lowest Price: $7.22
  • Avg. Price: $64.63

Ryobi Oem Zrp421 One+ 4-1/2" Angle Grinder G4

RYOBI
ZRP421
14.00 X 5.80 X 5.50 Inches
4.80 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

Brand New in box. The product ships with all relevant accessories

3Pcs Grinder Flange Angle Wrench Spanner Metal Lock Nut For Compatible With Dewalt Milwaukee Makita 193465-4 Bosch Black & Decker Ryobi 4.5" 5" 5/8-11

DKERT
SVASDA
3.80 X 3.80 X 0.30 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
aesthet shop 0.00

Features

🔧Compatible with Makita: 9005BZ 9015B 9505BH 9527PB 9527NB 9015DB 9561CV 9016B 9049 9067L 9077SL 9564,GA7021 GA9040S GA5010Z 10.5A 5" Angle Grinder 9564PC 4-1/2" SJS Angle Grinder 9557NB 9558PB GA6020 9005B 9503BH 9524NB 9528PB 9528NB 9" 15A Soft-Start Technology 6" Angle Grinder

🔧Fit for Dewalt Milwaukee Makita :193465-4 Bosch Black & Decker Ryobi ,9029 Grinder 9069 9016DB 9047L 9558NB 9557PB GA5020 10.5A 5" SJS 9565PC 5" SJS 9554NB GA4530 4-1/2" 9015A,9029 9069 9016DB 9047L 9558NB 9557PB GA5020 10.5A 5" SJS Angle Grinder 9565PC 5" SJS 9554NB GA4530 4-1/2" 9015A Angle Grinder.

🔧Replacement part numbers: 224399-1, 193465-4, 224568-4 parts

🔧Outer Nut Size: 5/8"-11, suit for all 4-1/2",5" and 7" grinders that have a 5/8"-11 threaded shaft (NOT FIT FOR Milwaukee 4-1/2'')( Inner did not fitMilwaukee 2780-20)

🔧Package includes:1pcs angle grinder wrench, 1 pcs inner angle grinder flange nuts , 1 pcs outer angle grinder flange nuts. Please check the size and comptibility before order

Kowood 4-1/2" 5" 5Pcs Angle Grinder Flange Nuts With Spanner Compatible For Dewalt Makita Angle Grinder Flange With 5/8"-11 Threaded Shaft

KOWOOD
YB-01
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
yuchuan-us 9.86

Features

1pcs angle grinder wrench, 2 pcs inner angle grinder flange nuts , 2 pcs outer angle grinder flange nuts. Please check the size and comptibility before order

Outer Nut Size: Very suitable for installing KOWOOD wood carving disc on Angle Grinder, 5/8"-11, suit for all 4-1/2",5" and 7" grinders that have a 5/8"-11 threaded shaft (NOT FIT FOR Milwaukee 4-1/2'')

Compatible for Dewalt Milwaukee Makita Angle Grinder Flange with 5/8"-11 threaded shaft, Dewalt Milwaukee Makita 193465-4 Bosch Black & Decker Ryobi ,9029, 9069, 9016DB, 9047L, 9558NB, 9557PB, GA5020 10.5A 5" SJS, 9565PC 5" SJS, 9554NB, 9015A, etc

Fit for Makita 9005BZ 9015B 9505BH 9527PB 9527NB 9015DB 9561CV 9016B 9049 9067L 9077SL 9564,GA7021, GA9040S 9" 15A, GA5010Z 10.5A 5", 9557NB, 9558PB, GA6020, 9005B, 9503BH, 9524NB, 9528PB, 9528NB 9" 15A Angle Grinder, etc

Kindly reminder for our customer checks the size of your Grinder before place an order to avoid ordring in mistake

Applianpar Angle Grinder Inner Outer Flange Lock Nut For Black & Decker Dewalt Ryobi Milwaukee Makita 224399-1 193465-4 224568-4 Metal Set Of 2

APPLIANPAR
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
ApplianParDirect 9.83

Features

Outer Nut Size: 5/8"-11, fit 4-1/2", 5" , 7" grinders that have a 5/8"-11 threaded shaft

Fits models: Dewalt Milwaukee Makita 9029 Angle Grinder 9069 9016DB 9047L 9558NB 9557PB GA5020 10.5A 5" SJS Angle Grinder 9565PC 9554NB GA4530 4-1/2" 9015A 9005BZ 9015B 9505BH 9527PB 9527NB 9015DB 9561CV 9016B 9049 9067L 9077SL 9564 GA7021 GA9040S 9" 15A Soft-Start Technology Angle Grinder GA5010Z 10.5A 5" 9564PC 4-1/2" 9557NB 9558PB GA6020 6" 9005B 9503BH 9524NB 9528PB

Replaces part numbers: 224399-1 193465-4 224568-4

Package includes: 2 x Inner angle grinder flange nuts, 2 x Outer angle grinder flange nuts

Ryobi Rak6Agd125 Angle Grinder 125Mm Cutting Kit (6 Piece), Grey

RYOBI
RAK6AGD125
7.48 X 5.12 X 0.83 Inches
0.79 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Indisaurus 5.77

Features

The Ryobi RAK6AGD125 Angle Grinder 125mm Cutting Kit includes 6x 125mm discs for 125mm angle grinders.

Featuring 5x metal cutting discs and 1x diamond cutting disc for cutting metal and stone.

Ryobi Ag452K Angle Grinder Replacement Wrench # 039028001052

RYOBI
39028001052
1.63 X 1.63 X 5.00 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PowerToolReplacementParts 9.89

Features

Sold on Amazon

Ryobi Ag4031G 4-1/2" 5.5-Amp Angle Grinder

RYOBI
GIDDS2-3554563
5.51 X 12.60 X 4.92 Inches
4.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Zbest Deals 9.89

Features

Lightweight design with 3-position handle for left or right-handed use with an additional possible v

Tool-Free Adjustable Guard: Provides quick guard installations and adjustments

Wheel guard adjusts for use in various applications

Wrench storage in side handle

Die-cast aluminum gear housing for durability

Ryobi Gidds2-3554576 6" 2.1 Amp Grinder With Led Lights

RYOBI
GIDDS2-3554576
9.76 X 14.13 X 9.33 Inches
17.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TheCountryButler 9.74

Features

Visual LED bar graph indicates the presence of voltage

The higher the voltage sensed, or the closer to the voltage source, the more LEDs light up

Bright flashlight illuminates work area and may be used independent of voltage detection function

Ryobi Zrp421 One Plus 18V Cordless 4-1/2In Angle Grinder (Bare Tool) (Renewed)

RYOBI
ZRP421-CR
14.00 X 5.80 X 5.50 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Midwest Factory Reconditioned Tools 9.38

Features

Battery and Charger SOLD SEPARATELY

4-1, 2 in. grinding wheel and 3 position side handle included

Genuine Factory Reconditioned OEM Ryobi Tool

GripZone over-mold for improved comfort with a positive grip

Ryobi Zrag403G 5.5 Amp 4-1/2 In. Angle Grinder (Green) (Renewed)

RYOBI
ZRAG403G
5.11 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TheCountryButler 9.74

Features

Item Package Weight - 5.10811061054 Pounds

Lightweight design with 3-position handle for left or right-handed use with an additional possible.

Item Package Quantity - 1

Product Type - DISC GRINDER TOOL

Ryobi Rak6Agd115 115Mm Angle Grinder Accessory Set (6 Piece)

RYOBI
RAK6AGD115
19.69 X 19.69 X 11.02 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
looev 5.25

Features

1 x 115 mm Diamond Cutting disc ideal for cutting stone

5 x Abrasive Cutting disc ideal for cutting metal

Compatible with all 115mm angle grinders

Ryobi Ag454 7.5 Amp 120V Ac 11,000 Rpm Corded Angle Grinder W/ Rear Rotating Handle

RYOBI
3576752
2.50 X 5.50 X 12.30 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TheCountryButler 9.74

Features

This refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box

Ryobi One+ Hp 18V Brushless Cordless Compact 1/4 In. Right Angle Die Grinder (Tool Only)

RYOBI
PSBDG01B
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
McKinney Investments, LLC DBA BMGMsales 9.53

Features

Up to 2 Times More Power Than Pneumatic

4-Mode Speed Control For Maximum Control

Over 225 ONE+ Tools - All Work with Any RYOBI ONE+ 18V Battery

Ryobi 18V 4-1/2" Angle Grinder Tool P421 + (2) Batteries P102 + Charger P118 (Bulk Packaged)

RYOBI
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Trendtechs 9.63

Features

This item is bulk packaged and may arrive in a generic box

Ryobi 18-Volt Brushless 4-1/2 In. Cut-Off Tool/Angle Grinder Kit With Battery And Charger, (Non-Retail Packaging, Bulk Packaged)

RYOBI
1002334858-1002587790
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Bear Paw Goods 9.90

Features

This item is removed from retail packaging for shipping purposes (Bulk Packaged, No Retail Packaging) and will arrive in a generic shipping box or bag

Brushless motor provides longer runtime, more power, and longer motor life

Up to 1.5X the runtime (compared to P102, RYOBI 18-Volt ONE+ Lithium-Ion 1.3 Ah Compact Battery)

Charges ONE+ batteries in as little as 1 hour

Compact size for portability

#TOP16

King Arthur's Tools Universal Wrench, Flange & Nut Set For Angle Grinder - Fits Most Makes & Models Of Electric & Pneumatic Power Tools With Standard 5/8”(16Mm) #13730

KING ARTHUR'S TOOLS
13730
1.25 X 6.00 X 8.00 Inches
0.13 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
King Arthur's Tools 6.26

Features

COMPATIBILITY - Replacing your Flange or Nut but unsure what size? King Arthur's Tools Universal Wrench, Flange & Nut Set fits most 5/8" electric and pneumatic power tools including Ryobi, DeWalt, Porter Cable, Milwaukee, Black & Decker, Hitachi, Makita, Bosch, and Fein.

UNIVERSAL DESIGN - Power tools from different manufacturers all have proprietary different sized nuts, disc flanges and two pin spanner wrenches, none of which are compatible with each other. Our universal design works with a variety of angle grinders, sanders and polishers.

TANDEM CAPABLE - Designed specifically to work with King Arthur’s Tools Lancelot and Squire chain saw blades. You can now use multiple blades in tandem and configure up to 7 different combinations.

UNIVERSAL WRENCH - Tighten or loosen most accessories e.g. chainsaw blades (single or in tandem), flap disc sanders, grinding wheels, carbide discs, wire brushes, masonry blades, polishing and buffing wheels.

MADE IN THE USA - Universal Wrench, Flange and nut sets are made to the highest quality standards to be durable, safe and reliable. Made right here in the USA!

Ryobi 18V 4-1/2In Angle Grinder Tool P421 + (2) Batteries P102 + Charger P118 (Bulk Packaged) (Renewed)

RYOBI
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Embie Industries 9.59

Features

These items are Factory Reconditioned, some show more wear than others

18-Volt for high-power applications

Onboard spanner wrench conveniently located in the side handle for easy access

Wheel Size 4 1, 2Inches

Ryobi Ag454 7.5 Amp 120V Ac 11,000 Rpm Corded Angle Grinder W/ Rear Rotating Handle (Certified Refurbished)

RYOBI
AG454-CR
2.50 X 5.50 X 12.30 inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
❤️️ Shop 1-Click (SN Recorded) 9.88

Features

This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com

IDEAL FOR grinding metals and sanding wood or metal surfaces

LOCK-ON BUTTON makes longer jobs a cinch by letting you keep the grinder running while you have both hands in a more stable position on the tool

ROTATING REAR HANDLE lets you get into tighter spots and control the angle while maintaining a comfortable grip

THREE-POSITION SIDE HANDLE gives you increased leverage for tackling a variety of angles

Angle Grinder Wrench Grinder Spanner Wrench Grinder Flange Nut 5/8-11 4 Pcs Compatible With Dewalt Milwaukee Metabo Makita Grinder Parts Bosch Ryobi Black Decker

MIKMAYTOO
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
MIKMAYTOO 9.38

Features

Value Sets – 1 piece adjustable lock nut wrench and 2 sets of inner and outer angle grinder nuts .compatible with most grinders and lock nuts, must-have tools for flexible and portable home use.

Versatile Fit & Compatibility –These grinder shaft nut, fit 4-1/2",5" and 7" grinders those have a 5/8"-11 threaded shaft(NOT FIT FOR Milwaukee 4-1/2'').Compatible with Dewalt Ryobi Makita Milwaukee Bosch Hitachi Metabo Black & Decker grinders .Dewalt DW400, DW4011, DW4010, DW849,D28402, Makita 9005B, 9015A/B, 9015DB, 9016DB etc,, Replacement for Makita 224399-1, 193465-4, 224568-4..Non-original aftermarket parts, please check the size and comptibility before purchasing

Wrench Adjustable Design– Adjustable grinder wrench Compatible with most grinders and lock nuts ,universal applied to 4”,5”,6”7”9” angle grindere.

Premium Quality– -Made of hight quality hard carbon steel, stronger, more durable, wear resistance. It has good heat dissipation, which is beneficial to prolong the life

Easy to Replace and Install :Increase the performance of your angle grinder with our grinder flange nut Kit. When replacing, adjust the proper width of the grinder wrench to adapt it to the grinder nut, screw on the new outer lock nut tightly with the adjustable angel grinder wrench. Then your angle grinder will work normally

Ryobi 7 In. 10 Amp Angle Grinder (Renewed)

RYOBI
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TheCountryButler 9.74

Features

Product Type - DISC GRINDER TOOL

Material - Metal

Item Package Quantity - 1

It is a power angle grinders

Ryobi 18 One+ 18V Cordless 4-1/2 In. Angle Grinder Kit (Renewed)

RYOBI
PAG01KMX-CR
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Midwest Factory Reconditioned Tools 9.38

Features

Grinder:18-Volt for high-power applications Grinder: 6500 RPM for precision at high speeds

Grinder: Onboard spanner wrench conveniently located in the side handle for easy access

Battery: Extreme weather performance to withstand frigid weather conditions

Battery: Delivers fade-free power for maximum performance

Battery: Lightweight design for reduced user fatigue

Ryobi One+ Hp 18V Brushless Cordless 4-1/2 In. Angle Grinder (Tool Only) Pblag01B (Renewed)

RYOBI
PBLAG01B-CR
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TheCountryButler 9.74

Features

Item Package Weight - 6.0 Pounds

Product Type - DISC GRINDER TOOL

Package Quantity - 1

Accessories may not be original, but will be compatible and fully functional. Product may come in generic box.

Angle Grinder Wrench Angle Grinder Nut 2Pcs Grinder Flange Nut 5/8-11 Grinder Nuts, Angle Grinder Tool Compatible With Dewalt Milwaukee Metabo Makita Bosch Ryobi Black Decker Grinder Parts

HOBEREROK
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
BERERTO 7.93

Features

✅Value Sets – 1 piece adjustable lock nut wrench and 1 set of inner and outer angle grinder nuts .compatible with most grinders and lock nuts, must-have tools for flexible and portable home use.

✅Wrench Adjustable Design– Adjustable grinder wrench Compatible with most grinders and lock nuts ,universal applied to 4”,5”,6”7”9” angle grindere

✅Versatile Fit & Compatibility –These grinder shaft nut, fit 4-1/2",5" and 7" grinders those have a 5/8"-11 threaded shaft(NOT FIT FOR Milwaukee 4-1/2'').Compatible with Dewalt Ryobi Makita Milwaukee Bosch Hitachi Metabo Black & Decker grinders .Dewalt DW400, DW4011, DW4010, DW849,D28402, Makita 9005B, 9015A/B, 9015DB, 9016DB etc,, Replacement for Makita 224399-1, 193465-4, 224568-4..Non-original aftermarket parts, please check the size and comptibility before purchasing

✅Easy to Replace and Install :Increase the performance of your angle grinder with our grinder flange nut Kit. When replacing, adjust the proper width of the grinder wrench to adapt it to the grinder nut, screw on the new outer lock nut tightly with the adjustable angel grinder wrench. Then your angle grinder will work normally

✅Premium Quality– -Made of hight quality hard carbon steel, stronger, more durable, wear resistance. It has good heat dissipation, which is beneficial to prolong the life.

Poagavgs 5/8"-11 193465-4 Grinder Backing Flange Angle Wrench Spanner Metal And Lock Nut Set For Makita Dewalt Bosch Black Decker Ryobi Milwaukee Replaces 224399-1 193465-4 224568-4 Parts

POAGAVGS
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Pro-Parts 9.76

Features

New Replacement for:Makita 224399-1, 193465-4, 224568-4

Outer Nut dimensions: 5/8"-11,Suitable for 4-1/2",5" and 7" grinders that have a 5/8"-11 threaded shaft

Fit Models:for Dewalt DW400 DW402 D28402 Milwaukee Makita 193465-4 Bosch Black & Decker Ryobi,Grinder 9029 9069 9016DB 9047L 9558NB 9557PB GA5020 10.5A 5" SJS 9565PC 5" SJS 9554NB GA4530 4-1/2" 9015A,9029 9069 9016DB 9047L 9558NB 9557PB GA5020 10.5A 5" SJS 9565PC 5" SJS 9554NB GA4530 4-1/2" 9015A Angle Grinder

Fit Models:for Makita 9005BZ 9015B 9505BH 9527PB 9527NB 9015DB 9561CV 9016B 9049 9067L 9077SL 9564,GA7021 GA9040S GA5010Z 10.5A 5" Angle Grinder

Package Include:1 x Grinder Flange Angle Wrench;2 x outer Angle Grinder Flange Nut;2 x Inner Angle Grinder Flange Nut

Ryobi 2.1 Amp 6 In. Grinder With Led Lights, Bg612G, (Renewed)

RYOBI
GIDDS2-3554576-CR
9.76 X 14.13 X 9.33 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

Adjustable work rests for precise control and wheel usage

Heavy duty 2.1 Amp induction motor for dependable operation

LED lights for superior visibility of application

Heavy gauge steel base reduces vibration and improves stability during use

This item is Factory Reconditioned. Some show more wear than others

Top 10 power grinders Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Ryobi 18
Applianpar 1
Dkert 1
Hobererok 1
King Arthur's Tools 1
Kowood 1
Mikmaytoo 1
Poagavgs 1

Top 10 power grinders Brands Pie Chart


We've carried out a comprehensive analysis of 2,904 reviews on power grinders, using our selection criteria to identify the best options in the home improvement. Our findings reveal that most customers typically select power grinders priced around $64.63, with top brands including porter-cable, dewalt, black+decker, metabo hpt, makita, milwaukee, geevorks, wen and skil and bosch

Our team of expert editors reviewed these high-quality items and handpicked the top 25 power grinders for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the home improvement category. These include amazon.com, redcow deals, tech & beyond, showtimetools, jbtools, licairui, cabinworld, jeff’s garage and product x mas and aote us .

We are dedicated to assisting our users in finding the right grinders Products based on their needs, saving them considerable time when choosing which power grinders to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.