Uploaded January 2021 | Updated September 2026, 1 hour ago

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T27 vs T29 Grinder Flap disc differences : Welding tips and tricks
Here is a quick video on how to determine which flap disc to use on your grinder. The T27 runs flat and is smoother while the T29 is aggressive and works on most surfaces. The T27 and T29 both come handy and its a great idea to have both in stock. The T29 is more of an everyday flap disc and used more often than a T27 in my applications.

Here are some links to flap disc on Amazon.com

amazon.com/SATC-Grinding-Sanding-Wheels-Flap-Disc/dp/B07W6LNRXM/ref=sr_1_4?dchild=1&keywords=flap+disc&qid=1611537441&sr=8-4

amazon.com/WORKPRO-20-pack-Zirconia-Abrasive-Grinding/dp/B07M6XN561/ref=sr_1_3?dchild=1&keywords=flap+disc+t29&qid=1611537507&sr=8-3

amazon.com/Rovtop-Zirconia-Grinding-Including-Surfaces/dp/B085Q8BFYN/ref=sr_1_5?dchild=1&keywords=flap+disc+t29+rovtop&qid=1611537535&sr=8-5

Dewalt disc are more pricey, here is an example

homedepot.com/p/DEWALT-FLEXVOLT-4-1-2-in-x-7-8-in-40-Grit-Flap-Disc-Type-29-DWAFV84540/207206995?NCNI-5

lowes.com/pd/Norton-Redheat-Ceramic-4-5-in-40-Grit-Flap-Disc/1000236539

lowes.com/pd/DEWALT-Zirconia-4-5-in-36-Grit-Flap-Disc/1207167