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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#41
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Digital Scales, Recalibration?
"Jim Wilkins" wrote in message ...
snip Good catch! It looks considerably more compact and durable than the discontinued HF 440 Lb Big Game Scale. snip jsw The scale I was looking at went up in price so I bought one of these on eBay for $69.99 with free shipping. http://www.ebay.com/itm/Digital-Hang...em337252 3cbc For $2 more than the Amazon price I went from a 440 lb. scale to a 660 lb. scale. RogerN |
#42
Posted to rec.crafts.metalworking
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Digital Scales, Recalibration?
"RogerN" wrote in message news:RY- http://www.ebay.com/itm/Digital-Hang...em337252 3cbc For $2 more than the Amazon price I went from a 440 lb. scale to a 660 lb. scale. RogerN That's a nice compact one. 660 lbs is enough to lift Sears lawn tractors. They told me the newer ones run about 500 lbs when I called, before driving the Ranger to another state to fetch mine. These have a minimum length of 10" hook to hook, which is helpful when you don't have much headroom between the hanging point and the top of the load, like loading a lathe or welder with a truck bed crane: http://www.harborfreight.com/1-4-qua...ist-67144.html This is my preference for a pulley to double the range: http://www.tractorsupply.com/blocks/...pacity-1834185 You can swivel the side plates to insert it in the middle of a winch cable whose hook won't fit through a fixed-frame pulley. They disassemble easily to lube with snap ring pliers. The axle friction could be lower, but if you yank sideways on the lines you can pretty much equalize their tensions. Yesterday I experimented with ways to measure the tension in a rope that's pulling a leaning tree back upright. I attached a scale to the rope with a prusik loop and pulled until rope section between the prusik and the anchor went slack. That seems to be good enough to check the tension. The rope is long enough that the tension doesn't vary much with distance. I didn't want to suggest it until I had tried. jsw |
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