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Author Topic: Wooden Jack-up motorcycle lift  (Read 594 times)

Offline goldy

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Wooden Jack-up motorcycle lift
« on: Sep 20, 2018, 20:02:22 »
I thought there might be a little bit of interest in this. A good friend of mine built one quite a few years ago and has been using it ever since.
I'll include the plans and some pictures. (Click on the attachment for bike lift plans below)
« Last Edit: Sep 20, 2018, 20:04:44 by goldy »
1948 Norton ES2
1955 AJS 20B
1956 Triumph TRW
1968 Triumph T100 special
1969 Norton Commando
1975 XS650 Yamaha

Offline trek97

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Re: Wooden Jack-up motorcycle lift
« Reply #1 on: Sep 20, 2018, 20:18:59 »
It is a nifty unit.

Putting some real faith into the fasteners holding the "plate" the jack arm is pushing against.

« Last Edit: Sep 20, 2018, 20:21:06 by trek97 »

Online irk miller

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Re: Wooden Jack-up motorcycle lift
« Reply #2 on: Sep 20, 2018, 22:20:06 »
It is a nifty unit.

Putting some real faith into the fasteners holding the "plate" the jack arm is pushing against.
The type of wood and the fastener determines shear strength of the fastener.   A plain old deck screw in southern yellow pine has a shear strength of 150 lbs and a withdrawal strength of 100 psi.  That's a lot of umph.

I can't open the file and get the plans, but by the pic it looks plenty strong.

Offline trek97

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Re: Wooden Jack-up motorcycle lift
« Reply #3 on: Sep 21, 2018, 14:34:41 »
The type of wood and the fastener determines shear strength of the fastener.   A plain old deck screw in southern yellow pine has a shear strength of 150 lbs and a withdrawal strength of 100 psi.  That's a lot of umph.

I can't open the file and get the plans, but by the pic it looks plenty strong.

It’s not working on shear.  The cup is removed from jack and the top “face?of the jacks lifting arm is pushing on the face of the board.  So working under “withdraw?conditions. 

Online irk miller

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Re: Wooden Jack-up motorcycle lift
« Reply #4 on: Sep 21, 2018, 15:59:09 »
It’s not working on shear.  The cup is removed from jack and the top “face?of the jacks lifting arm is pushing on the face of the board.  So working under “withdraw?conditions.
I gave you two forces- shear and withdrawal.  Please read my comment again.