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Cast Iron Manual Meat Grinder Mincer table hand crank |  |
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DANDY 2 QT ICE CREAM FREEZER SINGLE MOTION HAND CRANK ANTIQUE COOLER ICE CHEST | |
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NIB AROMA GOURMET ICE CREAM FREEZER 4 QT. ELEC. & HAND CRANK | |
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BOLINDER"S meat grinder hand crank vintage Made in Sweden with cutting blade | |
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Vtg Wood Wooden Hand Crank Manual Table Coffee Grinder Box Drawer | |
0 Bid | US $22.00 | 38m |
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COFFEE GRINDER VINTAGE CAST METAL HAND CRANK WOOD BOX MILL VERY GOOD ANTIQUE? | |
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US $35.00 | 25d 13h 8m |
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Antique 1930's Elma Cast Iron European Spain Coffee Grinder 8" Hand Crank Wheel | |
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RARE ANTIQUE BRASS COFFEE SPICE GRINDER HAND MILL CRANK | |
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US $45.00 | 19d 24m |
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Antique Coffee Mill Wilson's Chuck wagon US MFG Co Hand Crank Cast Iron Wall | |
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Vtg COFFEE Grinder Mill Hand Crank with drawer | |
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US $33.94 | 11d 2h 37m |
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Hand Crank
What is the maximum force one person can apply to a hand crank winch as a percentage of body weight.?
I remember reading that a person can apply around 75% of body weight to pulling a rope.
What I'm looking at is hypothetical output on a 12:1 yacht winch adapted for tree work (Called a GRCS).
My searches result in hits selling electric winches.
>>You weigh W = 200 pounds (after Christmas >>dinner) and can lean on the crank with about half >>your weight. Thus, effective weight is = W X .5 = >>100 pounds.
This is the direction I'm going, is .5 a hard rule of thumb, or is that SWAG.
I guess I should say I'm looking for a rule as to the value of efficiency (W * E)= winch input.
Frankly I don't think your question is at all arbitrary. You have a 12:1 winch and want to know how much force you can generate when leaning on it with all your weight. The answer is straightforward: 12 X your effective weight. Your effective weight = W X efficiency; where W is your measured weight and efficiency is the percentage of that W you can bring to bear on the winch handle.
EXAMPLE: You weigh W = 200 pounds (after Christmas dinner) and can lean on the crank with about half your weight. Thus, effective weight is = W X .5 = 100 pounds. Therefore, the force on the working end of the winch is 12 X 100 pounds = 1,200 pounds. Now understand, you don't get nothin' for nothin'. So you'll need to do a lot of cranking to get the working end (attached to that tree) to move just a small distance.
If you want to work out how much of your weight you can put onto the crank, try putting a bathroom scale on the floor and then leaning over to push down on it. Whatever you can get the scale to read would be about your effective weight.
NOTE: The number I gave above are just examples. To do this right, you need to know what your own effective weight will be when leaning on that crank. There is no rule of thumb that I know of. However, if you do the bathroom scale experiment and place the scale at the same distance, height, reach, etc. of the crank on your winch, you should be able to measure your effective weight.
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Cast Iron Coffee Grinder Mill Hand Crank NIB | |
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US $49.99 | 25d 3h 2m |
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NEW 14" x 5" ESTRELLA Cast Iron Manual Hand Crank MEAT Corn Coffee GRINDER mill | |
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US $49.99 | 28d 2h 1m |
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Vtg Wood Wooden Hand Crank Manual Table Coffee Grinder Box Drawer | |
0 Bid | US $22.00 | 38m |
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COFFEE GRINDER VINTAGE CAST METAL HAND CRANK WOOD BOX MILL VERY GOOD ANTIQUE? | |
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US $49.00 | 26d 23h 27m |
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Vintage Wooden HT Armin Coffee Grinder Mill Hand crank F German | |
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US $49.99 | 29d 2h 36m |
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Vintage KLINGENTHAL Nut Seed Spice Mill Grinder Table Mount Hand crank | |
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US $35.00 | 25d 13h 8m |
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Antique 1930's Elma Cast Iron European Spain Coffee Grinder 8" Hand Crank Wheel | |
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US $199.99 | 16d 19h 34m |
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RARE ANTIQUE BRASS COFFEE SPICE GRINDER HAND MILL CRANK | |
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US $276.25 | 13d 20h 56m |
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Coffee Grinder - Hand Crank - Brass Top | |
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US $45.00 | 19d 24m |
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Antique Hand Crank Coffee Grinder | |
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US $47.50 | 20d 22h 57m |
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Antique Coffee Mill Wilson's Chuck wagon US MFG Co Hand Crank Cast Iron Wall | |
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US $199.00 | 9d 7h 45m |
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Vtg COFFEE Grinder Mill Hand Crank with drawer | |
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US $33.94 | 11d 2h 37m |
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USING A HAND CRANK TO START A 31 FORD RUMBLE SEAT COUPE
