Grinding Wheels Discs

Using torque to find the speed of a wheel?
a grinding wheel is in the form of a uniform solid disk of radius 6.94cm and a mass of 2.06kg. it starts from rest and accelerates uniformly under the action of the constant torque of 0.606N*m that the motor exerts on the wheel.
how long does the wheel take to reach its final operating speed of 1200 rev/min?
through how many revolutions does it turn while accelerating?
I=m*r^2/2
T=I*alpha
we have enough to compute alpha
0.606=(2.06*.0694^2/2)* alpha
alpha=122 rad/s^2
I rev=2*pi rad
I min=60 sec
w=alpha*t
1200 rev/min=
1200*2*3.14/60 rad /sec
125.6 seconds
th=.5*alpha*t^2
although for this starting from rest under constant acceleration the average speed is
600 rev/min
or 10 rev/sec
so the revs are
1256
j
Grinding Wheel & Flap Disc
| | WESTWARD Arbor Flap Disc, 4-1/2, 36, Extra Coarse QTY 5 $23.99 |
| | Metal Working 16mm Inner Dia Grinding Disc Wheel 2 Pcs $5.46 |
| | 4″ inch Diamond coated grinding disc wheel CUP SHAPE $9.99 |
| | 3M Abrasive Scotch-Brite High Strength Discs 8″ x 1/2″ #00672 – 10PCS $39.99 |
| | 2–Dayton 7″ X 1/4″ GRINDING DISCS—Disc-Wheel-Disk for Metal $7.99 |
| | NEW UNITED ABRASIVES INC 58460 4 1/2″ X 7/8″ 60 GRIT 3Z ZIRCONIUM FIBER DISCS $72.99 |
| | NEW UNITED ABRASIVES INC 58480 4 1/2″ X 7/8″ 80 GRIT 3Z ZIRCONIUM FIBER DISCS $66.99 |
| | NEW UNITED ABRASIVES INC 58436 4 1/2″ X 7/8″ 36 GRIT 3Z ZIRCONIUM FIBER DISCS $62.99 |
| | NEW UNITED ABRASIVES INC 58450 4 1/2″ X 7/8″ 50 GRIT 3Z ZIRCONIUM FIBER DISCS $76.99 |
| | 2 Pcs Wool Felt Polishing Disc Wheel for Metal Steel $4.96 |
| | Lot of 24 Discs: New Grinding Wheels 4 1/2 x 1/4 x 7/8 $9.60 |
| | Standard Abrasives Buff and Blend HP Discs – 850708 $15.00 |
| | 1/5″ Thread Dia Grinding Flap Wheel Sanding Disc 2 Pcs $8.32 |
| | ZEC Semiflex Disc 7 x 7/8 Grinding Abrasive Wheel 5 Pk $28.95 |
| | 5 – Sait 20060 4-1/2×1/4×7/8 Grinding Wheel Disc $16.99 |
| | 20 4.5″ 60 Grit Aluminum Oxide Neiko Flap Discs Bevel Grinding Sanding Wheels $23.99 |
| | LOT OF 2 NEW NORTON FLAP DISC GRINDING WHEELS 1 IS 40 GRIT 1 IS 80 GRIT BOTH NEW $6.00 |
| | 100mm 4 inch Diamond tipped grind grinding grind disc wheel ( 4″ ) $8.99 |
| | 10pc 4-1/2 FLAP DISC SANDING GRINDING WHEEL 40 GRIT Paper made in Germany 7/8 $39.99 |
| | 10pc 4 ” FLAP DISC SANDING GRINDING WHEEL 40 GRIT Paper made in Germany 5/8 ” $34.99 |
| | 1″ Surface Sanding Disc Kit $12.99 |
| | 16mm Inner Dia Wool Felt Polishing Wheel Abrasive Disc $4.98 |
| | Grinding Wheel 7 inch Abrasive Disc 7″ New 10 Pcs. $9.99 |
| | Firepower 1423-3164 Type 29 Zirconium Alum Flap Disc $21.91 |
| | LOT OF 10-4 1/2 ” GRINDING WHEEL/DISC-*****FREE SHIPPING******* $14.99 |
| | Flat Round 3.9″ Wheel Glass Diamond Grinding Disc $7.30 |
| | 4″ Diamond Coated Glass Grinding Grind Disc Wheel Gold Tone $7.64 |
| | 3.9″ Glass Grinding Tool Diamond Coated Cutting Wheel Disc $9.63 |
| | 4″ Outside Dia Grit Abrasive Flap Discs Polishing Wheels 2 Pcs $7.55 |
| | 6″ inch 150mm Diamond segment grinding disc wheel blade 2 row $19.00 |
| | 4″ Sparkling Diamond Glass Grinding Grind Disc Wheel $7.64 |
| | 4″ Diamond Coated Glass Grinding Grind Disc Wheel Gold Tone $7.65 |
| | 2 Pcs 10cm Outside Dia 80# Grit Flap Sanding Disc Grinding Wheel $9.05 |
| | Steel Stone 5 Pcs Grinding Disc Abrasives Cutting Wheel $6.61 |
| | 4″ Outer Dia 80# Grit Flap Sanding Disc Grinding Wheel $7.52 |
| | 4″ Sparkling Diamond Glass Grinding Grind Disc Wheel $7.04 |
| | Grinding Disc Cut-off Cutter Blades Abrasives Cutting Wheel Tool 30 Pcs $10.01 |
| | 4-1/2″ x 7/8″ Flap Disc for Metal assorted 8pk 2 Each $18.99 |
| | Flat Round 3.9″ Wheel Glass Diamond Grinding Disc $6.97 |
| | Lot of 24 Discs: New Grinding Wheels 4 1/2 x 1/4 x 7/8 $29.98 |
| | Black Grinding Disc Cutting Wheel Blade Tool for Metal $3.90 |
| | 3.9″ Dia. Tile Glass Grinding Wheel Diamond Cutting Disc $6.27 |
| | Gold Tone Sparking Diamond Grinding Disc Wheel Glass 4″ $7.13 |
| | Gold Tone Sparking Diamond Grinding Disc Wheel Glass 4″ $7.46 |
| | Working 16mm Inner Dia Grinding Wheel Polishing Disc 2 Pcs $4.29 |
| | Black Metal Grinding Wheel Disc Abrasives Slice Cutting $3.77 |
| | Grinding Disc Cut-off Cutter Blades Abrasives Cutting Wheel Tool 30 Pcs $10.07 |
| | Granite Grinding Metal 114 x 1.8 x 20mm Diamond Disc Wheel $11.33 |
| | 4″ Diamond Coated Glass Grinding Grind Disc Wheel Gold Tone $7.23 |
| | Ivory Blue 0.6″ Hole Diameter Wool Felt Grinding Abrasive Wheel Disc $7.54 |
| | 2 Pcs Wool Felt Polishing Disc Wheel for Metal Steel $4.96 |
| | NEW Porter Cable 6″ 24 Grit TUNGSTEN CARIDE DISC Grinding Wheel 18030 FREE SHIP $12.95 |
| | 16mm Inner Dia Wool Felt Polishing Wheel Abrasive Discs 2 Pcs $5.35 |
| | 2PC Piece 2″ Zirconia Flap Disc 60 Grit Roloc Discs Grinding Wheels New $5.99 |
| | 4″ Diamond Coated Glass Grinding Grind Disc Wheel Gold Tone $7.03 |
| | 11mm Thick Nylon Buffing Wheel Grinding Disc for Metal $3.92 |
| | 3.9″ Glass Grinding Tool Diamond Coated Cutting Wheel Disc $6.91 |
| | Milwaukee Flap Disc 7″ x 7/8″ 36 Grit 48-80-3009 Italy $4.50 |
| | Reduced Sparking Wheel Glass Diamond Grinding Disc 3.9″ $7.33 |
| | Pair 3.7″ Outer Dia Wool Felt Polishing Wheel Sanding Disc for Metal $5.66 |
| | Grinding Cup Wheel Plate Mounted Green Silicon Carbide $15.00 |
| | 10PC Pieces 2″ Coarse Roloc Surface Conditioning Discs Prep Pads (Brown) $5.99 |
| | 10PC Pieces 2″ Medium (Maroon) Roloc Surface Conditioning Discs Prep Pads $5.99 |
| | 988C Roloc Fibre Discs #55753 by 3M 36 Grade 4″ Box/100 Grinding Disks New 104 $75.00 |
| | Black Grinding Disc Cutting Wheel Blade Tool for Metal $3.91 |
| | NEW 4 inch Diamond coated grinding disc wheel CAP SHAPE $5.99 |
| | 4″ Sparkling Diamond Glass Grinding Grind Disc Wheel $7.01 |
| | 16mm Inner Diameter Metal Polishing Wheel Sanding Disc Black $7.05 |
| | 20x 5″ 80 GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 125mm $69.95 |
| | 20x 5″ 120 GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 125mm $69.95 |
| | 10pk – 4-1/2 x 7/8 Ceramic Flap Disc Grinding Wheels $20.50 |
| | 20x 4.5″ 120 GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISC ANGLE GRINDER 115mm $59.95 |
| | 20x 4.5″ 80 GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 115mm $59.95 |
| | 40 x 5″ GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 125mm $119.95 |
| | 80 x 5″ GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 125mm $219.95 |
| | 48 New 4 1/2″ Grinding Wheel Discs 5/8″ hub 1/4″ Angle $9.99 |
| | 80 x 4.5″ GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 115mm $189.95 |
| | 40 x 4.5″ GRIT FLAP WHEELS ZIRCONIA SANDING GRINDING DISCS ANGLE GRINDER 115mm $105.95 |
| | 50 NEW 4.5″ Inch Grinding Cut Off Wheel Disc 1/16″ X 5/8″ Hub Tool $9.99 |
| | 50 NEW 4.5″ Inch Grinding Cut Off Wheel Disc 1/8″ Tools $9.99 |
| | 8mm Thickness Abrasives Grinding Sanding Disc Cutting Wheel $7.90 |
| | 4″ Outer Dia Flap Sanding Disc Grinding Wheel for Metal $3.55 |
| | 4″ Outside Dia Grit Abrasive Flap Discs Polishing Wheels 2 Pcs $7.53 |
| | Steel Stone 5 Pcs Grinding Disc Abrasives Cutting Wheel $5.70 |
| | 50 New 4 1/2″ Grinding Wheel Discs 7/8″ hub 1/4″ Angle $18.99 |
| | 50 NEW 4″ Inch Grinding Cut Off Wheel Disc 1/8″ Tools 5/8″ Arbor $9.99 |
| | Glass Diamond Grinding Wheel Disc 4 Inches Sparking $5.71 |
| | 4.13″ Outside Diameter Metal Grinding Wheel Sanding Disc $3.58 |
| | 16mm Inner Dia Wool Felt Polishing Wheel Abrasive Discs 2 Pcs $5.64 |
| | Pair 3.7″ Outer Dia Wool Felt Polishing Wheel Sanding Disc for Metal $5.30 |