An extension that long will likely whip round and be quite dangerous. You need a bearing support near the grinding bit, extended grinders are available for that Answer from lewtheegg on reddit.com
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Canada Welding Supply
canadaweldingsupply.ca › products › metabo-flexible-die-grinder-extension-shaft-30980-630980420
Metabo Flexible Die Grinder Extension Shaft 30980 (630980420) – Canada Welding Supply Inc.
Metabo Flexible Die Grinder Extension Shaft Metabo 4 ft. long, heavy duty flex shaft is designed for variable speed die grinders. This rubber covered flex shaft has ball bearing construction and comes with a 1/4 In. collet for 1/4 In. shank ...
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Henrytools
henrytools.com › extended-die-grinders.html
Extended Length Die Grinders | Airtools | Henrytools Manufacturer
Extended straight air die grinders are ideal for grinding, sanding, and shaping in an industrial environment. The additional length helps to facilitate work in hard-to-reach areas. All of these air grinders can use either carbide burrs or mounted grinding stones, available separately.
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The Garage Journal
garagejournal.com › forums › the tools › general tool discussion
Die grinder shank extension (1/4)? | The Garage Journal
May 11, 2019 - An extended die grinder can work better then long shank burrs, which can be dangerous enough. ... Definitely don't use those set screw based things...they barely work in drills, I can't imagine using one at 20,000rpm · To avoid these ads, REGISTER NOW! ... Metabo flex shaft. I have owned it for about 5 years. I don't use it much but saved my *** a couple times. ... When I think of an extension in a die grinder, I can only picture it wrapped in intestines after bending and eviscerating the user.
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Pryme
prymemx.com › products › extendeddie
Extended Die Grinder Adapter | Pryme
Extended Die Grinder Adapter
Info What Does It Do? Allows you to mount a mini cleaning wheel onto your die grinder or 1/4" rotary tool Extended length is great for those hard to reach areas and cleaning inside bores How Does It Work?Simply mount a mini cleaning wheel onto the adapter, install into your die grinder and you're ready to get to business. If you'd like to make your own size wheels from worn down larger cleaning wheels, this adapter comes with a template for doing so.  Related ItemsMini cleaning wheels can be purchased Here Does not include wheels or grinder tool. Do not use with wheels thicker than 1/2", or
Price   US$12.00
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Rsci
rsci.com › extension-shaft-flexible-die-grinder-suitable-for-g-500-ge-700-ge-900-plus-ge-710-compact-ge-710-plus-ge-950-g-plus-g-400-gp-400-black-color
Extension Shaft, Flexible, Die Grinder, Suitable For G 500, GE 700, GE 900 Plus, GE 710 Compact, GE 710 Plus, GE 950 G Plus, G 400, GP 400, Black Color - Richmond Supply Company
Extension Shaft, Flexible, Die Grinder, Suitable For G 500, GE 700, GE 900 Plus, GE 710 Compact, GE 710 Plus, GE 950 G Plus, G 400, GP 400, Black Color
Metabo 630980420 is a 4 ft long rubber-coated shaft, with a 1/4 in collet, used for die grinders. The flex shaft has a speed range of 7500 to 30000 rpm.
Price   US$413.01
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Walmart
walmart.com › c › kp › die-grinder-extension
Die Grinder Extension
5/8Inch-11 Thread Angle Grinder Extension Kit,Available in 2 Inch, 3 Inch, 4 Inch,5 Inch Sizes Grinder Extension Shaft,4 * 5/8Inch-11 Thread Extension Shaft,Black · Upgrades Air Die Grinder Long Extension Shaft Woodworking Tool Multipurpose
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HomemadeTools.net
homemadetools.net › forum › angle-grinder-shaft-extension-93470
angle grinder shaft extension - HomemadeTools.net
I'm sure someone has made one of these, but I can't recall ever seeing one if so, I'm sure none were ever used this way I needed to clean the inside of a formed beam but no grinder would fit except for little rt angle pneumatic die grinders but those things take forever to do much. So I made a 3inch long extension to fit the 5/8-11 thread on angle grinders out of a length of 1" round bar.
Find elsewhere
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The Home Shop Machinist
bbs.homeshopmachinist.net › forum › general
Angle grinder extension - The Home Shop Machinist & Machinist's Workshop Magazine's BBS
I never measured the difference until now but I managed to gain 0.238" in reach compared to the original supplied drive washer. It may not seem like much but it made all the world of difference to the flap sanders since with this the grinder's shaft sits well below the flaps for final polishing.
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Ballewsaw
ballewsaw.com › dynabrade 43488 shaft, extension die grinder, 3"
Dynabrade 43488 Shaft, Extension Die Grinder, 3"
Dynabrade 43488 Shaft, Extension Die Grinder, 3"
Shaft, Extension Die Grinder, 3"
Price   US$98.89
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Ballewsaw
ballewsaw.com › dynabrade 43498 shaft, extension die grinder, 6"
Dynabrade 43498 Shaft, Extension Die Grinder, 6"
Dynabrade 43498 Shaft, Extension Die Grinder, 6"
Shaft, Extension Die Grinder, 6"
Price   US$119.94
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Bayside Performance
baysideperformance.ca › home › tools and supplies › jet tools › air tools › air tools › jet tools 1/4 inch .6 hp air die grinder 3 inch extended shaft
JET Tools 1/4 Inch .6 HP Air Die Grinder 3 Inch Extended Shaft - Bayside Performance
JET Tools 1/4 Inch .6 HP Air Die Grinder 3 Inch Extended Shaft Powerful .6 horsepower motor Front exhaust, compact motor housing Motor shaft features ball bearings front and back, and motor end plates are made from durable die cast
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Amazon
amazon.ca › Canadian-Tool-Supply-Extended-XDG-14 › dp › B00DSXHGS0
Canadian Tool and Supply 1/4-Inch Extended Reach Air Die Grinder Extra Long (XDG-14) : Amazon.ca: Tools & Home Improvement
Canadian Tool and Supply 1/4-Inch Extended Reach Air Die Grinder Extra Long (XDG-14) : Amazon.ca: Tools & Home Improvement
Canadian Tool and Supply 1/4-Inch Extended Reach Air Die Grinder Extra Long (XDG-14) : Amazon.ca: Tools & Home Improvement
(4.5)
Price   $64.99
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CarbideBur
carbidebur.com › home › 9″ die grinder extension tool
9" Die Grinder Extension Tool - Longer Reach for Carbide Bur Bits
July 21, 2025 - 9" Die Grinder Extension Tool Our 9" die grinder extension tool is in stock and ships SAME DAY ordered. The extension tool allows you to have an extra 9" reach for your our carbide bur die grinder tool bits
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Harbor Freight
harborfreight.com › home › air tools & compressors › air tools
1/4 in. Professional Extended Air Die Grinder
1/4 in. Professional Extended Air Die Grinder
The CHIEF™ 1/4 In. Professional Extended Air Die Grinder has a paddle trigger for superior control and a 4 in. extended shaft to reach obstructed areas. The ergonomic grip reduces vibration while the compact design provides excellent maneuverability.
(4.7)
Price   US$69.99
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Carbideburr
carbideburr.net › home › carbide burrs › accessories › ex9 die grinder bit extension tool holder
EX9 Die Grinder Bit Extension Tool Holder Fast USA Shipping
EX9 Die Grinder Bit Extension Tool Holder
High quality 9" extension tool perfect for your carbide burr die grinder bits.  All our extensions are in stock and shipped SAME day your order is placed.  Your order will be shipped USPS Mail with delivery order tracking. We accept all major credt cards including Visa, Mastercard, American Express, Discover, PayPal and Venmo. Follow us on Youtube, Twitter, Facebook and Instagram for more discounts. SPECIAL SALE TODAY!   Click here to get 10% off your order
Price   US$59.95
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Caswellcanada
caswellcanada.ca › home › buffing supplies › adapters/mandrel
Extra Long Shaft Extender - Caswell Canada
Extra Long Shaft Extender
Mount larger sized buffing wheels onto a rotating shaft. Fits 1/2" diameter and 5/8" diameter shafts. Thread shaft allows addition of accessories.
Price   $37.37