Torque Drive
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 1 4 Drive Torque Wrench Adjustable Tension Tool in Plastic Case Micrometer New $47.62 Time Remaining: 5d 4h 14m Buy It Now for only: $47.62 |
 Snap on TQFR250C 40 250 ft lb 1 2 Drive Torque Wrench $85.00 (1 Bid) Time Remaining: 10h 5m |
 SNAP ON QD1R50 ADJUSTABLE CLICK TYPE TORQUE WRENCH 10 15 IN LBS 1 4 DRIVE $51.00 (6 Bids) Time Remaining: 7h 15m Buy It Now for only: $115.00 |
 Eastwood Digital Electronic Torque Angle Wrench 3 8 Drive Torque Wrench $135.94 Time Remaining: 19d 2h 32m Buy It Now for only: $135.94 |
 Snap On QD3R250 50 to 250 Ft Lb Torque Wrench 1 2 Drive Click Type New w case $103.51 (5 Bids) Time Remaining: 2d 16h 12m Buy It Now for only: $225.00 |
 1 2 Drive Torque Wrench Adjustable Tension Tool in Plastic Case Micrometer New $47.62 Time Remaining: 21d 13h 43m Buy It Now for only: $47.62 |
 Snap On Torque Wrench Electronic TECHANGLE Flex Ratchet Wrench 1 2 Drive $199.00 (12 Bids) Time Remaining: 18h 34m |
 Snap On Torque Wrench Adj Click Type Flex Ratchet 1 2 Drive 40 250 ft lbs NEW $183.58 (14 Bids) Time Remaining: 8h 32m |
 Eastwood 1 2 Drive Digital Electronic Torque Wrench $89.99 Time Remaining: 13d 5h 14m Buy It Now for only: $89.99 |
 Snap On Torque Wrench Adj Click Type Flex Ratchet 3 8 drive stockQD2FR75 $50.02 (6 Bids) Time Remaining: 1d 14h 15m |
 OTC Torque Angle Gauge 360 Degree Scale Marked in 2 Degree Increments 1 2Drive $13.95 Time Remaining: 12d 3h 10m Buy It Now for only: $13.95 |
 Snap on 3 8 Drive Electronic Flex Head Torque TechAngle Wrench ATECH2FR100A $249.00 (6 Bids) Time Remaining: 18h 34m |
 SNAP ON QD1R200 1 4 DRIVE 40 200LBS TORQUE WRENCH IN CASE 8 5214 $152.50 (13 Bids) Time Remaining: 15h 8m |
 Adjustable Torque Wrench Micrometer 1 2 drive $24.50 Time Remaining: 28d 12h 33m Buy It Now for only: $24.50 |
 Snap On QC2FR75 3 8 Drive 5 75ft lb Torque Wrench NO RESERVE $46.59 (19 Bids) Time Remaining: 2d 11h 35m |
 Eastwood Digital Electronic Torque Wrench 3 8 Drive $112.94 Time Remaining: 19d 2h 32m Buy It Now for only: $112.94 |
 INDESTRO Super Vintage Torque Wrench Indicator Made in Chicago 1 2 Drive $5.99 Time Remaining: 17h 43m |
 Snap On QD1200 40 to 200 In Lb Torque Wrench 1 4 Drive Click Type New w case $24.99 (1 Bid) Time Remaining: 3d 16h 47m Buy It Now for only: $200.00 |
 CTA Tools 2054 Hex Bit Socket 14mm 1 2 Drive High Torque $5.99 Time Remaining: 18d 12h 27m Buy It Now for only: $5.99 |
 Snap On TQFR100B 3 8 Drive Flex Head Torque Wrench NO RESERVE $67.00 (12 Bids) Time Remaining: 2d 11h 35m |
 Eastwood Digital Electronic Torque Angle Wrench 1 2 Drive Torque Wrench $135.94 Time Remaining: 22d 9h 38m Buy It Now for only: $135.94 |
 Snap on 3 8 drive ATECH2FR100A TECHANGLE Flex Head Torque Wrench 5 to 100 ft lb $289.99 Time Remaining: 3d 16h 10m |
 NEW Snap On FAR7200 3 8 Drive Compact Air Ratchet 70 LB OF TORQUE No Reserve $105.90 (4 Bids) Time Remaining: 1d 7h 34m |
 K Tool 72100 Ratcheting Torque Wrench 3 8 Drive 20 200 in lb 11 Long $34.99 Time Remaining: 25d 11h 39m Buy It Now for only: $34.99 |
 Snap On 3 8 drive Inch lb Dial Torque Wrench $50.00 Time Remaining: 1d 12h 48m |
 ProValue 1 2 Drive Torque Wrench Pro Value CarQuest $25.00 Time Remaining: 5d 18h 1m Buy It Now for only: $25.00 |
 SNAP ON QD3R250 1 2 DRIVE 50 250ft LBS TORQUE WRENCH IN CASE 8 5215 $108.00 (6 Bids) Time Remaining: 1d 8h 48m |
 Matco Tools TRC250 Torque Wrench 1 2 Drive 25 250 ft lbs Fixed Head with case $76.00 (14 Bids) Time Remaining: 1d 11h 59m |
 New 1 2 Drive Click Stop Clicker Torque Wrench 20 150 ft lbs 18 Long w Case $28.99 Time Remaining: 26d 10h 25m Buy It Now for only: $28.99 |
 Snap On 1 2 Drive Click Torque Wrench QJR 3200B 30 200 ft lb w Case Nice $36.00 (8 Bids) Time Remaining: 18h 11m |
 3 8 Drive Torque Wrench Adjustable Tension Tool in Plastic Case Micrometer New $47.62 Time Remaining: 26d 14h 34m Buy It Now for only: $47.62 |
 Snap On QD3R250 Torque Wrench 1 2 Drive 24 Long NO RESERVE $0.99 (1 Bid) Time Remaining: 3d 17h 4m |
 Snap on Tools TQ 12B Torque Wrench 1 2 Drive 150 Foot Pounds $0.99 Time Remaining: 2d 19h 51m |
 Summit Torque Wrench Click Style 20 150 lbs 1 2Drive Steel Chrome Storage Case $38.90 Time Remaining: 28d 2h 55m Buy It Now for only: $38.90 |
 SNAP ON TOOLS LOT 23 3 8 DRIVE FLEX HEAD TORQUE WRENCH QC2FR75 5 75 FT LBS $32.00 (4 Bids) Time Remaining: 3d 20h 5m |
 Click stop torque wrench 1 2 drive $29.95 Time Remaining: 22d 15h 13m Buy It Now for only: $29.95 |
 Snap On QD2R200 Torque Wrench ADJ CLICK TYPE USA 40 200 IN LB 3 8 Drive $15.50 (3 Bids) Time Remaining: 3d 13h 2m |
 SNAP ON TORQUE WRENCH 1 2 DRIVE 50 250 ft lbs $150.00 Time Remaining: 2d 8h 37m Buy It Now for only: $300.00 |
 CTA Tools 2056 Hex Bit Socket 17mm 1 2 Drive High Torque $6.99 Time Remaining: 18d 12h 27m Buy It Now for only: $6.99 |
 Matco TWBD1250 0 250in lb 3 8 Drive Dial Torque Wrench EXC $10.50 (3 Bids) Time Remaining: 4d 19h 53m |
 1 4 Drive Torque Wrench 20 200 in lbs w Case $28.99 Time Remaining: 10d 15h 42m Buy It Now for only: $28.99 |
 1 4 Drive CLICK Micrometer TORQUE WRENCH 20 200 In lb $33.29 Time Remaining: 10h 37m Buy It Now for only: $36.99 |
 Snap On Torque Wrench 1 2 Drive 220 ft pds 265 newton meters $177.00 Time Remaining: 11h 20m Buy It Now for only: $198.00 |
 Torque wrench 3 8 drive 540 inch lbs 60THP $17.95 Time Remaining: 11d 16h 42m Buy It Now for only: $17.95 |
 SNAP ON QD2FR75 3 8 DRIVE 5 75ft LBS TORQUE WRENCH IN CASE 8 5216 $140.00 (16 Bids) Time Remaining: 1d 8h 53m |
 Digital Torque Wrench Adaptor 1 2 Drive Ft Lb N m Kg cm Kg m Lb in Nm Tension $72.89 Time Remaining: 20h 34m Buy It Now for only: $72.89 |
 SNAP ON TORQOMETER TORQUE WRENCH 1 2 DRIVE 0 175 FT LBS TE 175 $99.00 Time Remaining: 16h 37m |
 drive Flex Head Micrometer Torque Wrench KD 85057 $109.99 Time Remaining: 19h 22m |
 Spline drive torque wrench adapter 3 8 drive 3 8 size ROLLS ROYCE Spanner NEW $19.99 Time Remaining: 14d 4h 1m Buy It Now for only: $19.99 |
 1 Inch Drive Air Impact Wrench Gun Truck Tire Air Tool 1900Ft Lb Torque HD Tool $244.95 Time Remaining: 8h 53m |
 Snap On 3 8 Drive Flex Head Torque Wrench QC2FR75 5 75 ft lbs $135.00 Time Remaining: 27d 13h 34m Buy It Now for only: $135.00 |
 SNAP ON 1 2drive CLICK HEAD 200 lb Torque Wrench $108.38 (1 Bid) Time Remaining: 3d 4h 3m |
 Proto 6062F 1 4 Drive Inch Pound Ratchet Head Micrometer Torque Wrench $34.99 Time Remaining: 5d 17h 19m |
 Eastwood Digital Electronic Torque Wrench 1 2 Drive $111.94 Time Remaining: 19d 2h 32m Buy It Now for only: $111.94 |
 SNAP ON QD3R250 1 2 DRIVE 50 250 ft LBS TORQUE WRENCH IN CASE 2 23744 $62.00 (9 Bids) Time Remaining: 1d 12h 59m |
 ProValue Proto Style 1 2 Drive Ratchet Torque Wrench 10 150ftlb 14 207 Nm NEW $29.99 Time Remaining: 23d 6h 36m Buy It Now for only: $29.99 |
 Craftsman 47712 20 200 FT LBS 1 2 Drive Torque Wrench FIX ME $0.99 (1 Bid) Time Remaining: 5d 9h 56m |
 PITTSBURGH TORQUE WRENCH 1 2 DRIVE CLICK STOP NEW WITH CASE $0.99 (1 Bid) Time Remaining: 4d 13h 26m Buy It Now for only: $17.99 |
 SNAP ON TORQ O METER TORQUE SCREWDRIVER 1 4 INCH DRIVE 0 24 INCH POUNDS MD TQS2A $110.00 Time Remaining: 2d 9h 58m Buy It Now for only: $110.00 |
 1 4 Drive CLICK Micrometer TORQUE WRENCH 20 200 In lb $33.29 Time Remaining: 1d 16h 56m Buy It Now for only: $36.99 |
 CDI TORQUE WRENCH 3 8 DRIVE 30 250 LBS 2502MRPH $90.00 Time Remaining: 4d 22h 11m Buy It Now for only: $90.00 |
 BLACKHAWK BY PROTO DIAL TORQUE WRENCH 0 600 LBS POUNDS 3 4 INCH DRIVE W CASE $99.99 Time Remaining: 17h 4m |
 SNAP ON TORQUE ANGLE GAGE TA 362 3 4 DRIVE $0.99 Time Remaining: 4d 13h 25m |
 1 2 Sq Drive Adjustable Torque Angle Gauge Tool 360 degrees Square $21.87 Time Remaining: 21d 19h 41m Buy It Now for only: $21.87 |
 Snap on TECHANGLE 125 250 FT LB 1 2 Drive Torque Wrench Used NR $63.00 (13 Bids) Time Remaining: 6d 9h 34m |
 CTA Tools 2052 Hex Bit Socket 12mm 1 2 Drive High Torque $5.99 Time Remaining: 13d 14h 3m Buy It Now for only: $5.99 |
 NEW Snap on 3 4 drive Torque Wrench Electronic TECH4R600 60 600 ft lbs $700.00 Time Remaining: 5d 16h 6m Buy It Now for only: $800.00 |
 Craftsman 9 44642 1 2 Drive 150 Foot Pounds Beam Style Torque Wrench $0.99 Time Remaining: 5d 16h 34m |
 1 2 Drive Impact Wrench Gun 900 Foot Pounds Torque $186.95 Time Remaining: 5d 9h 27m Buy It Now for only: $186.95 |
 Craftsman Torque Wrench model 944443 1 2 drive VERY NICE $29.00 Time Remaining: 5d 17h 44m Buy It Now for only: $39.00 |
 Eastwood Electronic Torque Angle Adapter for 3 8 or 1 2 Drive Socket Ratchet $71.94 Time Remaining: 19d 2h 32m Buy It Now for only: $71.94 |
 Snap On 3 8 Drive Flex Head Click Type Torque Wrench 5 75 ft lb w Case $0.99 Time Remaining: 4d 17h 34m |
 Matco 50 250 Foot Pound 22 inch 1 2 drive Reversable Torque Wrench $99.99 Time Remaining: 2d 5h 55m |
 CDI 301LDI 1 4 DRIVE DIAL TYPE TORQUE WRENCH 0 30 INCH LB $75.00 Time Remaining: 28d 5h 1m Buy It Now for only: $75.00 |
 Snap On 3 8 Drive Click Torque Wrench QJR 284B 50 1000 in lb w Case Mint $0.99 (1 Bid) Time Remaining: 4d 17h 41m |
 K Tool International KTI72102 WRENCH TORQUE 1 2IN DRIVE 25 250FT LBS $88.01 Time Remaining: 5d 11h 59m Buy It Now for only: $88.01 |
 Snap On Torque Socket 1 2 Drive 22mm 75 ft lbs No Reserve $1.00 (1 Bid) Time Remaining: 3d 16h 34m |
 MAC TOOLS WTE1463 5pc 1 2 Drive Wheel Torque Ext Kit $55.00 Time Remaining: 1d 10h 56m Buy It Now for only: $65.00 |
 SNAP ON 7 16 Torque Adaptor Wrench 12 Point 3 8 Drive SAE FRDH141 Free Ship $24.99 Time Remaining: 28d 7h 8m Buy It Now for only: $24.99 |
 Snap On QD3R250 50 250lb Torque Wrench 1 2 Drive Nice No Reserve $56.99 (10 Bids) Time Remaining: 5d 12h 46m |
 3 8 Drive Flex Head Micrometer Torque Wrench KDT85056 $145.82 Time Remaining: 7d 21h 9m Buy It Now for only: $145.82 |
 1 4 Drive CLICK Micrometer TORQUE WRENCH 20 200 In lb $33.29 Time Remaining: 3d 14h 36m Buy It Now for only: $36.99 |
 1 2Drive Torque Angle Gauge Rotation Tester Meter Tool $9.99 Time Remaining: 19h 11m |
 NEWSnap on TQFR250E 1 2Drive Torque Wrench flex head click type 40 250 ftlb $299.00 Time Remaining: 26d 10h 37m Buy It Now for only: $299.00 |
 Jonnesway 1 2 Drive Micrometer Torque Wrench Right Left Hand $85.00 Time Remaining: 1d 5h 13m |
 KD TOOLS GEARWRENCH 85054 1 2 Drive Micrometer Torque Wrench 20 250 ft lbs $112.95 Time Remaining: 24d 4h 52m Buy It Now for only: $112.95 |
 1 2 Drive Torque Wrench Pittsburgh $14.99 (1 Bid) Time Remaining: 1d 15h 10m |
 SK 74600 3 4 Drive Dual Scale 100 600 ft lbs Micro Adjusting Torque Wrench $10.50 (2 Bids) Time Remaining: 6d 13h 32m |
 Snap On QD2FR75 3 8 Drive Flex Head Torque Wrench Used NICE Condition $150.00 Time Remaining: 8d 8h 42m Buy It Now for only: $150.00 |
 1 2 Drive Click Stop Torque Wrench $12.95 Time Remaining: 1d 7h 39m |
 Sturtevant 850188 Flat Beam Torque Wrench 1 4 Drive + 0 5 in lbs $49.95 Time Remaining: 6d 16h 36m Buy It Now for only: $49.95 |
 MATCO T 250 FR DRIVE TORQUE WRENCH 1 2 USED NO RESERVE $19.99 (1 Bid) Time Remaining: 2d 16h 1m |
 Pittsburgh Heavy Duty 1 4 Drive Torque Wrench Clicker $29.95 (1 Bid) Time Remaining: 2d 6h 9m |
 Valley Industies 4pc 1 2 Drive Micro Torque Wrench $39.95 Time Remaining: 21d 10h 53m Buy It Now for only: $39.95 |
 CRAFTSMAN NEW TORQUE WRENCH 32999 3 8 DRIVE FOOT POUNDS $10.27 Time Remaining: 3d 14h 49m |
 Snap On L872 600 ft lb Click type torque wrench tool EXCELLENT 3 4 drive used $437.50 Time Remaining: 29d 12h 39m Buy It Now for only: $437.50 |
 260 LBS TORQUE Sears CRAFTSMAN PROFESSIONAL AIR IMPACT wrench 3 8 IN drive 19916 $75.00 Time Remaining: 3d 17h 4m Buy It Now for only: $95.00 |
 Snap On 1 2 Drive Impact Socket Wheel Torque Extension Toolbox Lot Set $16.77 (2 Bids) Time Remaining: 6d 16h 6m |
 1 4 Drive Electronic Torque Wrench KDT85072 $140.78 Time Remaining: 7d 21h 9m Buy It Now for only: $140.78 |
 LOT 2 PITTSBURGH PRO 1 4 Drive Click Stop Torque Wrench x2 $0.99 (1 Bid) Time Remaining: 5d 14h 46m Buy It Now for only: $60.00 |
Torque Drive
What is an AC Drive?
AC Drives are also known as Inverters, Variable Speed Drives (VSDs), Variable Frequency Drives (VFDs) and Frequency Converters. AC Drives are used to control AC Induction motors; the most common motor technology used in industry. The motors are rugged, require very little maintenance and can easily be manufactured with high environmental protection.
If an AC motor is connected directly to the mains supply the motor will accelerate quickly and then rotate at a fixed speed which is dependant upon the electrical supply frequency and the motor design. For some applications fixed speed is acceptable and, by carefully selecting gearbox ratios, a desired final output speed can be achieved. However, for most applications, hard acceleration, unbraked deceleration and the inability to vary the speed and torque represent a serious problem. AC Drives provide a solution by modifying the voltage and frequency of the AC supply to the motor. Control is achieved by either estimating the motor speed, known as open loop control, or by measuring the speed, known as closed loop control. Both techniques have advantages and disadvantages:
Open Loop Control
Open loop control provides the simplest means of controlling AC induction motors, as the speed of the motor is dependant upon the frequency of the supply, a basic means of control is simply to vary the voltage and frequency to achieve the desired motor speed. This method is known as V/Hz control. The major disadvantages of this method of control are poor precision and poor low speed torque.
A huge amount of research has been undertaken to improve the open loop performance of AC Drives. Open Loop Vector and Direct Torque Control technologies attempt to model the motor in real time to compensate for a wide range of factors that affect the speed and torque delivered at the output shaft. The result of these methods is a large performance and accuracy improvement, however, at low speed performance may still be a problem. Rotor Flux Control (RFC) is a new method of control for open loop drives which offers improved stability and greater dynamic performance.
Open loop drives are used where the motor is never required to hold a load at zero or low speed, and where the torque and speed accuracy are not important, typical applications include:
- Pumps
- Fans
- Conveyors
- Mixers
- Centrifuges
Closed Loop Control
Closed loop control is achieved by using a speed and position sensor connected to the motor shaft.
The result is stable, accurate, dynamic speed and torque control from standstill through to maximum speed. Typical application include:
- Cranes and hoists
- Lifts
- Winding
- Material handling
- Automotive testing
- Extruding
Intelligent Drives
Emerson Group's Control Techniques is the market leader in intelligent drives; this refers to drives that have programmable automation or motion controllers within the product as standard or as an option. Intelligent drives offer significant advantages; because the controller is located within the drive itself, communication delays are eliminated therefore improving performance in automation and motion applications and removing the need for external controllers, saving panel space. Unidrive SP, Commander SK, Digitax ST and Mentor II are all considered to be intelligent.
Energy Saving
It is estimated that energy saving of up to 20% can be achieved through installing and operating motors in a more efficient way. Installing AC drives in certain applications such as fans and pumps can have a dramatic effect on the energy consumed. With motors consuming an estimated two thirds of electrical energy within industry, drives must form a key part of any programme to reduce carbon emissions.
About the Author
Emerson Group
GTM 370Z SUPERCHARGER STG1 8PSI 550BHP/400 FT OF TORQUE 460 RWHP 360 RWTQ. TEST DRIVE