BLUESHARK Aluminum Flap Disc is your best choice for economic grinding and polishing workings. The special " Heat-Treated" Alo sanding paper bring extra sharp grinding and long service life performance. Thicker fiber backings support max safety even heavy-task.
1) APPLICATIONS:
Universally suitable for alloyed and unalloyed steel,structural steel,tool steel, high speed steel,stainless and acid resistant steels,non-ferrous metals,plastics and wood2) ADVANTAGES:
* Universal use
* Economic grinding cost
* Very long using life* Very high stock removal rate
* Made of special Alo papers with very fast grinding ability.
3) SPECIFICATION:
T27-FLAT TYPE 
ORDER NO SIZE GRIT TYPE QTY/BOX
27A10016 100x16 G40~120# T27 Flat 10pcs
27A11522 115x22.2 G40~120# T27 Flat 10pcs
27A12522 125x22.2 G40~120# T27 Flat 10pcs
27A15022 150x22.2 G40~120# T27 Flat 10pcs
27A18022 180x22.2 G40~120# T27 Flat 10pcs
T29-CONICAL TYPE 
ORDER NO SIZE GRIT TYPE QTY/BOX
29A10016 100x16 G40~120# T29 Concial 10pcs
29A11522 115x22.2 G40~120# T29 Conical 10pcs
29A12522 125x22.2 G40~120# T29 Conical 10pcs
29A15022 150x22.2 G40~120# T29 Conical 10pcs
29A18022 180x22.2 G40~120# T29 Conical 10pcs
4) ADDITIONAL INFORMATION:
a) TURBO style available--Coated 30% more abrasives than standard !!!
b) BLUESHARK produce flap discs with different backing plate:
*Fiberglass backing plate - Most popular and it's can reduce vibration and is consumed together with the flaps. High strenghth with light weight.
*Plastic backing plate- With very nice lookings and is trimmable to increasing service life. The ABS plastic backing with very high strength and supply mas safe working performance. Spin-On style also availabel.
*Nylon - Very familiar with plastic backings but with more light weight.
*Metal HUBS: provides extra high strength and rigid support as needed and normally using for heavy task . Also it can be recycled.
*Fiberglass backing plate - Most popular and it's can reduce vibration and is consumed together with the flaps. High strenghth with light weight.
*Plastic backing plate- With very nice lookings and is trimmable to increasing service life. The ABS plastic backing with very high strength and supply mas safe working performance. Spin-On style also availabel.
*Nylon - Very familiar with plastic backings but with more light weight.
*Metal HUBS: provides extra high strength and rigid support as needed and normally using for heavy task . Also it can be recycled.
c) Grit size recommendation
40#--Aluminum ,Unalloyed and low-alloy steels,low-strength stainless steel
60#--High-alloy,stainless steel,high-temperature and heat-treated steels
80#--High-temperature alloys
120#--For especially smooth steel finishes(refine polishing)
d) Best working angles
(15~30') 
(0~15')
For best performance , keep 15~30' when grinding and 0~15' while polishing & finishing.
e) If using flap discs replace fiber discs workings, you should choose one grade coarse grit size. Such like you should using 80# flap discs if
normally using 60# fiber discs.
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