We drive a car & we get a certain amount of horsepower (or KW) and a certain amount of torque from that engine, say 500nm would be considered a good amount of torque. Then here's this impact wrench & it has 1050 Nm of torque for doing up & 1650Nm of torque to undo!!
What's the difference between car torque at 500Nm & this electric thing at 1050Nm? I should be able to supply it constantly with 36v & I'd be able to tow my boat or caravan, because it has heaps of torque.
I realise this would never happen, but I'm confused by both things using the same torque scale & the impact driver winning hands down.
Item Name:
HiKOKI 36V 1/2" Brushless Impact Wrench 1050Nm Kit
Item #:
WR36DB(GRZ)
Price/ea:
$859.00 NZD $799.00 NZD
Product Image Gallery:
36V 1,050Nm 1/2? Impact Wrench Kit WR36DB(GRZ)
Product Info
1,050Nm Tightening Torque
1,650Nm Nut Busting Torque
Variable Speed Control
4-Stage Tightening mode selector
IP56 Dust and Water Resistant*
Powered by 1080W High Powered 36V Multi Volt batteries
Fastest charging with 32min Rapid Smart Charger
36V High Performance brushless motor
Friction ring
Bright LED light
Compact, Lightweight and well balanced at only 3.7kg
These products are designed to be resistant to dust and water. However it is not guaranteed that they will not fail. Refer to user manual for recommended use.
Product Specs
Capacity
Bolt
M12 - M30
High Tension Bolt
M10 - M24
Square Drive
12.7mm (1/2")
Tightening Torque
1,050Nm
Nut Busting Torque
1,650Nm
Voltage
36V Multi Volt
No Load Speed
High Mode
0 - 1,500/min
Medium Mode
0 - 1,200/min
Low Mode 2
0 - 900/min
Low Mode 1
0 - 600/min
Full Impact Rate
High Mode
0 - 2,900/min
Medium Mode
0 - 2,300/min
Low Mode 2
0 - 1,800/min
Low Mode 1
0 - 1,200/min
Approximate Tightening Torque
High Mode
1,050Nm
Medium Mode
800Nm
Low Mode 2
600Nm
Low Mode 1
400Nm
Overall Length
221mm
Weight
3.7kg (BSL36A18)
Standard Accessories
2 Batteries (BSL36A18), 32min Rapid Smart Charger, Belt Hook, Carry Case
I'm not sure but I'd bet the tool is measured at the drive end, after gearing down for torque multiplication etc. The car will be measured at the flywheel before the gearbox etc.
That car engine torq is continuous.
The torq in your IMPACT wrench is very quick hit, otherwise you would fly around with your wrench.
Engine torque for an internal combustion engine is measured by the force applied by the con rod, to the little end bearing of the crank pin, multiplied by the distance travelled which is equal to half the stroke of the motor.
Power of course is torque x RPM / V (v is a variable depending on HP or KW).
That's about all I know on subject.
Quote from: Hooli on Friday, 05 July 2019, 03:46 PM
I'm not sure but I'd bet the tool is measured at the drive end, after gearing down for torque multiplication etc. The car will be measured at the flywheel before the gearbox etc.
You got it. From the YT video below a Yam R1. 117 Nm at the crank are 1205 Nm at the rear axle in 1st gear and 603 Nm in 6th gear.
https://www.youtube.com/watch?v=V-uGZ1Df0m8