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Old 03-22-2014, 08:20 AM   #1
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Join Date: Jun 2011
Location: Kalamazoo, West Michigan
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Sherline tongue scale

I was looking at these on Amazon....kind of pricey for a unitasker. Why couldn't a clever fellow make one of these in the shop, do the math and accomplish the same result? I'm thinking about finding a pancake cylinder in the scrap pile, measuring the piston diameter, fill with oil and install a pressure gauge.

So if my cylinder has a 3" piston then the area would be 0.7854 d squared=7.0686 square inches. If my tongue weight is 500lbs then the gauge would read 70.735364 psi.

This will be my next G-job! We have a 5S event coming up which means brand new goodies going in the trash!! Should be a fun project.

2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.
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Old 03-22-2014, 08:42 AM   #2
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Location: Michigan
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Post results with pics. A tongue scale a useful device..., use my Sherline often.



2016 GM 2500HD 6.0L/4.10
2005 Jayco Eagle 278FBS
Reese HP Dual Cam
Putnam Class V
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Old 03-23-2014, 10:11 AM   #3
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I too have a Sherline. Makes me comfortable when I hitch up knowing exactly what % tongue weight I'm working with.
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Old 03-23-2014, 12:42 PM   #4
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To know is better than to guess.
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Old 03-23-2014, 04:28 PM   #5
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Bathroom scale is cheaper: http://hildstrom.com/projects/tonguescale/index.html
Mike Laupp

'13 Jayco Premier 351RLTS

'11 F250 CC FX4 6.7L TD SRW
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