They are made, they look like mini chainsaws and are commonly used for carving bowls.

A common brand for these blades is Lancelot

You can also get smaller saw blades in the 4.5" form factor. I suggest you go to a saw store or woodworking shop. Here is a product on Amazon:

http://www.amazon.com/KwikTool-BB450-2-Inch-1-Inch-8-Inch/dp/B000O3IOEW/ref=sr_1_2?ie=UTF8&qid=1357252670&sr=8-2&keywords=angle+grinder+wood+blade

Answer from Matthew on Stack Exchange
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Amazon
amazon.ca › Original-Speedcutter-Woodworking-Grinder-Manufacturer › dp › B07KFJ31G6
GRAFF Grinder Wood Carving Disc for 4-1/2" Angle Grinders - Wood Cutting Disc for Cutting, Sculpting and Shaping - Circular Saw Blade with 7/8 - Inch Arbor - 115 mm : Amazon.ca: Tools & Home Improvement
GRAFF Grinder Wood Carving Disc for 4-1/2" Angle Grinders - Wood Cutting Disc for Cutting, Sculpting and Shaping - Circular Saw Blade with 7/8 - Inch Arbor - 115 mm : Amazon.ca: Tools & Home Improvement
GRAFF Grinder Wood Carving Disc for 4-1/2" Angle Grinders - Wood Cutting Disc for Cutting, Sculpting and Shaping - Circular Saw Blade with 7/8 - Inch Arbor - 115 mm : Amazon.ca: Tools & Home Improvement
(4.4)
Price   $19.34
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Chtools
chtools.ca › 4-1/2" angle grinder saw blade continuous carbide tooth for wood 40 teeth
4-1/2" angle grinder saw blade Continuous Carbide Tooth for wood 40 teeth
4-1/2" angle grinder saw blade Continuous Carbide Tooth for wood 40 teeth
4-1/2" angle grinder saw blade for wood 40 teeth angle grinder blade for cutting wood 40 teeth. Ideal for carpenters, electricians and plumbers.
Price   $10.00
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Contractor Talk
contractortalk.com › home › forums › equipment & safety › tools & equipment
Wood cutting blade for 4 1/2" hand held grinder? | Contractor Talk - Professional Construction and Remodeling Forum
Use for Wood Cutting Blade on an Angle Grinder I have a Klutch Chop Saw Adapter and use a 4.5" angle grinder with a wood cutting blade on that for small projects. Works pretty well. The saw is held in place with a good blade guard.
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Walmart
walmart.com › ip › 4-5-40T-Carbide-Tipped-Circular-Saw-Blade-TCT-Wood-Angle-Grinder-5-8-7-8-Reducer-included › 819973061
4.5" 40T Carbide Tipped Circular Saw Blade TCT Wood Angle Grinder 5/8" -7/8", Reducer included - Walmart.com
4.5" 40T Carbide Tipped Circular Saw Blade TCT Wood Angle Grinder 5/8" -7/8", Reducer included
4.5" 40T Carbide Tipped Circular Saw Blade Quantity 1 Diameter 4.5 (115mm) Arbor 7/8-5/8 (5/8 come w/ reducer) Blade Type 40T Carbide Tipped Blade Max RPM 13,300 Application General Purpose, Cutting Method Wood Brand MTP
Price   US$7.95
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eBay
ebay.com › shop › angle-grinder-wood-cutting-blade
Angle Grinder Wood Cutting Blade | eBay
Indestructible Circular Saw Blades 4 inch 3 Pack for Metal Tile Wood CuttingOpens in a new window or tab ... 3x Tungsten Carbide 4.5" Wood Plastic Cutting Disc for Angle Grinder 7/8 5/8"Opens in a new window or tab
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FineWoodworking
finewoodworking.com › home › forum › wood blade for angle grinder?
wood blade for angle grinder? - FineWoodworking
March 6, 2003 - There are several different arbor diameters for those small angle grinders, so you may need to get a bushing for the blade you buy. Fortunately, they're usually right near the blades and abrasive wheels for those machines. ... First I would recommend NOT using a 4.5 inch grinder for this.
Find elsewhere
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Dunbarlumber
dunbarlumber.com › store › 4-5-ANGLE-GRINDER-SAW-BLADE-p215952520
4.5" ANGLE GRINDER SAW BLADE
Shop quality lumber, hardware, tools & building supplies online at Dunbar Lumber. Trusted service, top brands & local delivery across Greater Vancouver.
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Reddit
reddit.com › r/woodworking › angle grinder saw blades - safe or no?
r/woodworking on Reddit: Angle grinder saw blades - safe or no?
June 10, 2024 -

Recently learned that they sell mini circular saw blades that fit into a 4.5 inch angle grinder. That would be pretty damn convenient for dealing with small trees and such in the yard, but it seems like an amputation waiting to happen. Are they safe when used right? Seems like it would be prone to binding and kicking.

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WonderBlade™
wonderblade.com › home › angle grinder blades › toughgrit™ diamond blade for angle grinders (4.5″) 2-pack bundle
ToughGrit™ Diamond Blade for Angle Grinders (4.5") 2-Pack Bundle - WonderBlade™
April 27, 2023 - Cut metal, fiber cement, porcelain tile, and more with our ToughGrit™ Diamond Blade for Angle Grinders! 4.5" in Diameter with 7/8" Arbor. Free Shipping.
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Reddit
reddit.com › r/tools › i need opinions on putting a 4 1/2 inch wood blade in a 4 1/2 inch grinder for trimming brush.
r/Tools on Reddit: I need opinions on putting a 4 1/2 inch wood blade in a 4 1/2 inch grinder for trimming brush.
October 28, 2024 - They actually make a 4 and a half inch chainsaw blade for the angle grinders. It's basically two thin metal disks that sandwich a loop of chainsaw chain. Supposed to be used for carving designs into logs and whatnot, or hollowing out wood.
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Canadian Tire
canadiantire.ca › home › tools & hardware › power tool accessories › saw blades & accessories › circular saw blades
Rockwell 4.5-in 24T Steel Circular Saw Blade for Plastic, Wood, Composite | Canadian Tire
Rockwell 4.5-in 24T Steel Circular Saw Blade for Plastic, Wood, Composite
This compact 24 tooth carbide blade was made for cutting through wood, composite and plastic with your circular saw. It will easily cut through 2 by 4 lumber and make straight or beveled cuts in your projects with precision and clean edges thanks to the durable carbide teeth. Whether you're a professional contractor or weekend warrior, this blade will deliver sharp, accurate cuts to help your projects come together smoothly.
Price   $21.99
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The Stone Trust
thestonetrust.org › home › the stone trust store › tools › power tool blades › 4.5” grinder blade set
4.5” Grinder Blade Set
4.5” Grinder Blade Set
Two 4.5blades and a stainless Steel Flush Mount Adapter Item # 45GRNDSET Be ready to cut stone! Combine this set with the angle grinder of your choice and you are ready to cut stone! (NOTE: Always wear a proper respirator when cutting stone)
Price   US$142.00
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Walmart
walmart.com › home improvement
Grinder Wood Blade
$1212current price $12.12munirater 3PCS Angle Grinder Blades 4.5 in x 7/8 in 40 Tooth Angle Grinder Wood Blade Alloy Steel Angle Grinder Blades Suitable for All Kinds of Wood and Non-Ferrous Metals
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Amazon
amazon.ca › Grinder-Diamond-Ceramic-Porcelain-Cutting › dp › B0CK9RX3C8
Angle Grinder Saw Blade 4.5 Inch Diamond Ceramic Saw Blade Porcelain Tile Marble Stone Cutting Disc : Amazon.ca: Tools & Home Improvement
Angle Grinder Saw Blade 4.5 Inch Diamond Ceramic Saw Blade Porcelain Tile Marble Stone Cutting Disc : Amazon.ca: Tools & Home Improvement
Angle Grinder Saw Blade 4.5 Inch Diamond Ceramic Saw Blade Porcelain Tile Marble Stone Cutting Disc : Amazon.ca: Tools & Home Improvement
Price   $42.82
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Amazon
amazon.ca › OBA-Grinder-Carving-Grinders-Anti-Kickback › dp › B083CTDYZ1
OBA Grinder Wood Carving Disc for 4“ or 4-1/2" Angle Grinders, Chain Disc Double Saw Teeth Anti-Kickback Grinder Saw Blade,22 Teeth, 5/8" Center(New Generation) : Amazon.ca: Industrial & Scientific
This kind of angle grinder wood ... angle grinders can be installed and used. The inner hole of the angle grinder disc of the multi-function angle grinder is 16 mm, so it can be installed on 4 inch and 4.5 inch angle grinders well....
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Quora
quora.com › Can-I-use-a-4-blade-on-a-4-5-angle-grinder
Can I use a 4 blade on a 4.5 angle grinder? - Quora
Answer (1 of 2): Been a while since ... I got it wrong. No, you can’t use a 4″ wheel on a 4 1/2″ angle grinder - 4″ uses a 5/8″ diameter ......
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RONA
rona.ca › home › products › tools › power tool accessories › circular saw blades
4-1/2-in Circular Saw Blades - Power Tool Accessories | RONA
Shop 4-1/2-in Circular Saw Blades - Power Tool Accessories in-store or online at Rona.ca. Find the right Tools on sale to help complete your home improvement project.