A JMI Wheely Bar is a y-shaped base that fits under my G-11 tripod and allows me to roll it around my driveway and, with a simple ramp, in and out of my garage. At each end of the Y is a locking caster along with a leveling screw which is a length of 1/2-13 threaded rod with a rubber foot on the bottom end and an approximately 2" wide x-shaped knob on the top.
Now, to get into my garage, I have to lift the leveling screw by 2 or more inches, turning it perhaps 30 revolutions. That's a lot of turning with the fixed knob, so I've tried replacing the knob with a hand wheel with revolving handle, McMaster-Carr P/N 6033K71. After heating the rod with a propane torch for a minute or so, the loctite holding the original knob loosend so the knob could be unscrewed, and the wheel could be attached with its provided setscrew.
Everything fits well, but when I try to use the wheel's handle to turn the leg, the sideways force causes the leg to stick and bind so I can't turn it any more quickly or easily than with the original x-shaped knob. It turns out the the guide tube has an ID of about 0.6" which allows the 1/2" leg to wobble.
Has anyone had any success with this sort of upgrade? Any suggestions?
Now, to get into my garage, I have to lift the leveling screw by 2 or more inches, turning it perhaps 30 revolutions. That's a lot of turning with the fixed knob, so I've tried replacing the knob with a hand wheel with revolving handle, McMaster-Carr P/N 6033K71. After heating the rod with a propane torch for a minute or so, the loctite holding the original knob loosend so the knob could be unscrewed, and the wheel could be attached with its provided setscrew.
Everything fits well, but when I try to use the wheel's handle to turn the leg, the sideways force causes the leg to stick and bind so I can't turn it any more quickly or easily than with the original x-shaped knob. It turns out the the guide tube has an ID of about 0.6" which allows the 1/2" leg to wobble.
Has anyone had any success with this sort of upgrade? Any suggestions?
