INCIKITI 115mm Type 29 flap discs (20-pack) – 40 grit sanding and grinding discs for angle grinders
Product description
What these 115mm flap discs are for
INCIKITI’s 20-piece flap disc set is aimed at anyone who wants an angle grinder disc that can do more than just one thing. On paper, the mix of “40 grit” abrasive and the Type 29 bevel profile is designed to help with edge and corner grinding where flat discs can feel awkward.
These are the kind of discs people reach for when they’re blending surfaces, doing stock removal, or working through practical messes like rust or paint before the next stage of finishing. The description also points to cleaning and general finishing work, so they’re positioned as a versatile workshop consumable rather than a one-job-only attachment.
One thing to bear in mind: 40 grit is fairly abrasive. That’s useful for fast removal, but it also means you may still need a follow-up step if your end goal is a smoother surface.
What stands out in day-to-day use
A couple of details in the spec matter for real-world grinding: the zirconia abrasive material and the 115mm size with a 7/8" arbor.
The zirconia abrasive is described as stronger and more durable, with better service life even under high temperatures and pressure. In practical terms, that tends to suit heavier sessions—especially if you’re doing repeated passes rather than brief, careful touch-ups.
The backing system is also worth a look. These use a resin fibre construction combined with a fiberglass backing plate, which is intended to absorb vibrations and avoid smearing. That sort of vibration damping can make the disc feel more stable, which is helpful when you’re trying to keep an even bevel on an edge or blend into a corner.
Key features that affect performance
The set is built around a Type 29 bevel design, and that’s the “precision of edge and corner grinding” angle the listing calls out. If you often find yourself fighting for control along edges—say, tidying up weld runs, knocking back sharp metal corners, or cleaning up where two planes meet—this profile is aimed at making that easier.
Speed is listed too: a maximum of 13,300 RPM. That matters because flap discs behave differently at different speeds, you generally want to stay within the disc’s intended range and match it to your grinder’s capabilities and control.
In use, a micro-example would look like this: you switch the angle grinder on, keep steady pressure while working along a metal edge, and let the flaps do the blending as you move across the bevel. The “bevel” profile is meant to help the disc track the workpiece rather than riding awkwardly on a flat surface.
Tech specs
- Name: Flap Discs 115mm Angle Grinder Discs - INCIKITI 20pcs Grinding Discs 40 Grit Sanding Discs for Angle Grinder
- Type: Type 29 bevel flap discs
- Type 29 arbor size: 7/8"
- Disc diameter: 115mm
- Grit: 40 grit
- Quantity: 20pcs
- Maximum speed: 13,300 RPM
- Abrasive material: zirconia abrasive
- Backing plate: fiberglass backing plate with resin fibre construction
Where it makes sense (and where it might not)
It’s a solid buy if your main jobs are aggressive grinding and preparation—rust removal, paint stripping/buffing, blending, stock removal and similar workshop tasks on metal (including stainless steel, as mentioned).
It may not be the best fit if you’re expecting fine, polishing-grade results straight from the box. With 40 grit, you’re planning for removal first and finish later. Also, while the listing says it’s compatible with “most angle grinders” due to the 7/8" arbor, compatibility in the real world still comes down to your specific grinder model and how it mounts discs.
If you’re the sort of person who prefers delicate, low-vibration finishing or needs a very consistent fine surface, you may find yourself reaching for a finer grit disc after this one.
Care and safety notes for grinding discs
Flap discs are consumables, so performance will depend on how they’re treated during use. Keep an eye on how the abrasive wears and whether the disc starts to clog or lose its bite during paint or rust work.
Because the listing mentions high temperatures and pressure, it’s sensible to avoid long, heavy dwell times in one spot. Let the abrasive do the work, keep movement steady, and adjust pressure rather than forcing it.
Also, always confirm your angle grinder speed control can stay within the disc’s maximum speed (13,300 RPM is listed) and that the disc mounts securely for the 7/8" arbor size.
Buying verdict
Worth considering if you want a 115mm Type 29 flap disc set with 40 grit for fast, practical grinding and preparation on metal and similar materials. The zirconia abrasive and fiberglass/resin backing are the details that suggest better durability and more stable handling during longer sessions.
You may want to skip it if you need smoother finishing straight away, because 40 grit is geared towards removal. And if your grinder doesn’t accept the 7/8" arbor style, it won’t be the right direction to spend money on.
Mini FAQ
Will these flap discs suit edge and corner work?
The Type 29 bevel design is specifically described as improving precision of edge and corner grinding, so they’re meant to help in those tighter areas.
Are they only for metal?
The listing mentions metals and also rubber, wood, plastic and fiberglass. That said, your results will depend on the material and the kind of finish you’re after.
What does 40 grit mean for my finishing?
40 grit is abrasive and aimed at stock removal and preparation. For a finer finish, you’d likely need to move to a higher grit stage afterward.
What speed rating should I follow?
The maximum speed listed is 13,300 RPM, so it’s sensible to keep your angle grinder within that limit and use appropriate control.
Are they compatible with most angle grinders?
They state compatibility with most angle grinders thanks to the 7/8" arbor size, but it’s still worth checking your grinder’s mounting and disc fit before buying.