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SMT Discs
Multi-purpose grinding and blending discs, KLINGSPOR SMT Flap Discs offer an aggressive cut while leaving a pleasing finish. Often, one of the SMT discs will take the place of what is now two separate grinding operations - heavy weld removal with a hard grinding disc and then final blending and clean-up with a fibre disc. A built-in fiber-reinforced consumable backing plate eliminates the need for a separate backing pad. Plus you may use your standard angle grinder mounting nut.
SMT 624 a new twist on our convex flap discs. The new SMT 624 utilizes a 12° angled backing plate. This will enable the disc to be used on more severely curved surfaces like pipes and storage tanks. Sold in boxes of 10.

Sizes: 4- 1/2", 7" 
Grits: 36, 40, 50, 60, 80, 120

SMT 626 a tough alumina zirconia disc has a slight 6° convex form for use on flat or slightly contoured parts and on edges. Sold in boxes of 10.

Sizes: 4", 4- 1/2", 7" 
Grits: 36, 40, 50, 60, 80, 120

SMT 627 makes use of aluminum oxide grains on the flaps. This makes a flap disc that has more uses in applications involving wood, paint, and nonferrous metals. The 12° angle of the disc allows use on contoured parts and flat parts alike. Sold in boxes of 10.

Sizes: 4- 1/2" 
Grits: 36, 40, 50, 60, 80, 120

SMT 628 a flat-shaped version which makes it versatile for grinding on flat surfaces. Also made with our durable alumina zirconia grains. Sold in boxes of 10.

Sizes: 4-1/2", 5", 7" 
Grits: 36, 40, 50, 60, 80, 120

SMT 630 Our popular SMT 630 alumina zirconia flap disc with a multibond lubricant now has a new backing plate structure. It is a consumable fiber-reinforced backing just like our other SMT flap discs and with a new 12° convex angle. The 630 is best-suited for cooler edge grinding of stainless steel. Sold in boxes of 10.

Sizes: 4-1/2", 5", 7" 
Grits: 36, 40, 60, 80

SMT 640 - with built-in 5/8"-11 hole & thread
Ease of use and mounting become factors in production shops and in environments where training time is minimal. The SMT 640 is a flat disc with our premium alumina zirconia material and is suitable for use on the same materials and in the same applications as our other flat SMT flap discs. Sold in boxes of 10.

Sizes: 4-1/2" x 5/8"-11
Grits: 24, 36, 40, 50, 60, 80

SMT 650 - Here’s our longest lasting flap disc ever - the SMT 650. This is a double-thick disc that offers twice the grinding power and substantially less downtime from disc changing. We like to call the SMT 650 the “JUMBO”.

Sizes: 4-1/2" 
Grits: 36, 40, 60, 80 

SMT 656 -From the inventors of the flap disc comes the highest performing flap disc ever produced. KLINGSPOR is pleased to introduce the new SMT 656 flap disc. This convex shaped disc utilizes an enhanced abrasive material made specifically for the applications where the SMT 656 will be most effective. When used on stainless steel or steels of all types, you’ll realize a 50% longer service life, 50% higher stock removal, and 50% overall improved efficiency. Compare that with any other flap disc made by any other manufacturer. These are available in the most commonly used grits for steel.

Sizes: 4-1/2" 
Grits: 40, 60, 80 

SMT 800 - NON WOVEN flap disc The flexibility of non-wovens in a flap disc. High quality non-woven web abrasive mop disc for finishing work. Depending on the degree of hardness, these are also suited for cleaning and light de-burring work and the processing of TIG-welded seams on stainless steel. The new SMT 800 will also leave a pleasant finish on most metals and steels.

Sizes: 4-1/2" 
Grits: Coarse, Medium, Very Fine


NCD 200 - POWER WHEEL flap disc Powerful cleaning with the design of a flap disc.

Here’s a new disc that will clean rust, scale, paint, varnishes, or other surface imperfections. The NCD 200 is made of a coarse cleaning material imbedded with silicon carbide grains – the most effective for aggressive cleaning and removal applications. The high edge strength allows you to apply the necessary pressure without damaging the disc.

Sizes: 4-1/2" 


CMT - The most efficient and most innovative flap disc ever - the CMT Quick Change Flap Disc. This is a quick-change version of our industry-leading flap discs. The concept is a tremendous breakthrough for the metal grinding and finishing community. Production shops will greatly benefit with even less downtime and an increase in productivity.

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