Star Flex curved flap disc T29 125 mm for steel – grit 80
Description
Star Flex curved flap disc T29 125 mm for steel – grit 80

Star Flex flap disc T29 125 mm with grit 80 is a high-quality abrasive tool designed for professional steel working. The curved design (type 29) ensures precise work on edges, corners and welds — everywhere where control over grinding angle and material removal speed matters.
The corundum coating guarantees uniform wear across the entire working surface, ensuring consistent smoothing effect without scratches. The fibreglass backing provides disc rigidity and effectively absorbs vibrations, giving the operator full control during work — even during long grinding sessions.
Curved design (T29) — when to choose?

Flap discs come in two designs. The curved (T29) version — marked as TLI / TLS — has a narrower contact surface with the workpiece. This increases grinding pressure over a smaller area, which accelerates material removal. The optimal working angle is 10°–25°. This is the ideal variant for chamfering edges, removing welds and working on corners.
The flat (TLIF / TLSF) version is designed for grinding large, flat surfaces where a wide contact zone is required.
Applications
- Grinding and abrading welds after welding
- Chamfering and deburring steel edges
- Removing rust, dirt and old adhesive
- Removing old coatings of varnish or paint
- Surface smoothing without leaving scratches
Technical parameters

- Brand: Star Flex
- Disc type: curved flap disc (T29)
- External diameter: 125 mm
- Mounting bore diameter: 22.2 mm
- Grit: 80
- Hardness: R (hard)
- Abrasive material: corundum (A)
- Designation: SA80R-BF
- Workpiece material: steel
- Max. rotational speed: 12,200 rpm
- Max. linear speed: 80 m/s
- Backing: fibreglass
- Standard: EN 12413
- Certificate: ISO 9002
- Weight: 0.08 kg
- EAN: 5901289679220

Star Flex is a brand of Postal Steel Group, appreciated for years by professional workshops and enterprises in Poland and abroad. Star Flex flap discs combine high abrasive performance with durability and safety of use. Grit 80 is a universal choice ensuring good material removal efficiency whilst achieving a smooth surface — the optimal compromise for daily construction and workshop work.
The disc doesn't require high pressure — light, uniform pressure is sufficient to achieve effective grinding. This reduces operator fatigue and the risk of damaging the workpiece surface is minimal.
Technical data
| Brand | Starflex |
| Diameter | 125 |
| Grit Size | P80 |