Mounting Fisher Price Gearboxes

[Greg Needel]

before last year We would always file one side down to make a flat, then open the gearbox and install screws from the inside out.

If you are looking for an easier mounting solution maybe you should look at www.banebots.com their 36mm gearboxes will accept the FP motor.

[Andy Brockway]

FP welds a bar onto a nonrotating shaft than runs through the output gear hole. This provides a shelf for the gearbox to rest on and prevents rotation.

In the past we have wanted the shaft to rotate so we rested the gearbox on a piece of aluminum angle, 2x2 x 1/4 thk, and transfered the hole from the gearbox. The hole will end up against the web of the angle. we then used clamp collars on both ends to prevent axial shift.

You will have to adapt this for your application.

[Curt Henderson]

In the past we have mounted the FP gearboxes using the flat surface on the rear of the gearbox and then pass a bolt through the center hole. Last year we used the gearbox to run the o-ring drive on our ball launcher. In fact, we mounted the gearbox to a 2x4 wood stud and used a lag screw to hold the gearbox in place and then lagged the 2x4 stud to our frame. It made a hard mounting situation pretty easy actually.

Good Luck

[Dick Linn]

Years ago, when the drill motors/transmissions still came with the actual plastic drill casing, we used expanding polyurethane construction adhesive as a bedding compound to form a flat base on the curved case. We put waxed paper on a flat surface, rigidly held the case in the proper orientation, then squirted the glue in the gap at the base, followed by a couple of wedges of scrap wood. Once cured, we held the whole assembly down with large hose clamps. We used PL Premium, which is available at Lowes I think. They have many types, but this particular one will stick to a lot of different materials, including metal. It costs about $3.50 a tube.

http://www.stickwithpl.com/Products/...PLProductID=14

If you use this stuff, do not get any on your hands or clothing!

[Justin M.]

We made a custom aluminum plate that bolts up to the FP gearbox. Then we put a 90 degree bend onto the bottom part and mount it to the robot, to mount them vertically. I'll post pics later tonight.

Originally Posted by Greg Needel;57490
If you are looking for an easier mounting solution maybe you should look at [url

www.banebots.com[/url] their 36mm gearboxes will accept the FP motor.

The 36mm gearboxes aren't a good choice for the FP motors. They fit the 42mm gearboxes, however, Nanebots has sold out of all their high torque 256:1 gearboxes, and will not be getting them back in stock. This leaves only the 64:1 as the gearbox with the most torque, which might not be enough. The stock gearboxes are 124:1, which might be a better option for your team now anyway.