Auto Rotisserie

[r33_racer]

Ive just started making a rotisserie for my old mans HR build he is doing. I'll do my best to document the build in case anyone wants to make one. Ill try to do up a tech drawing as well of the whole unit with a material list.

This is where I am at presently.

One side.

And the other side.

Just the basic frame tacked up. Ive started turning up the inner and outer bushes for the rotating part of the frame. They will be welded into a scalloped out section on the top post.

Hopefully get more done later today.

[Craved]

i want!!!

lol

running 50x50 thick wall or regular 75x75?

just running a grease nipple for lube between the rotation tubes?

any plans to make this universal? as the rotation point (height from deck) will change with differing widths and centres of gravity

[r33_racer]

Yeh. Ive wanted one for a long time. Specifically when we first built the race car, however it was deemed not needed back then. Now my old man bought this old HR premier he wants to build up, we "NEED" them to re run the chassis rails and stiffen the whole car frame up. Mainly because we are putting an RB30 in it! lol. Hopefully I can get him to get a 3.4L stroker for it. Will make it interesting.

Back to the frame. Its all 75mm x 75mm x 5mm wall. So plenty strong enough. The main bush that Ive machined up will actually take two bearing. One at the front and one at the back of the bush, the ID of the bearing is 50mm. We will be running a 50mm pin that will have all the attachments off it. It will adjust in height and the attaching arms will adjust in width. So it will be universal to some degree. Just so long as the car body will fit between the base and the pivot point. Which I think at the moment is about 950mm.

Should do the job hopefully.

This is the bush sitting in the shallow scallop. You can see the recess seat for the bearing to be pressed into. Should make it rotate quite smoothly and easily and wont have to worry about pumping it full of grease and having it ooze out everywhere attracting dirt and grit. The beauty of sealed bearings.

[turboedsloth]

Very nice, i've been wanting to build one for my 32. Will be watching this thread now

[Craved]

wow, and i thought i over engineered stuff lol

nice work as always michael

[r33_racer]

Cheers

Yeh, Well the main reason I used 75 x 75 is because thats the most scrap I could find around the place. Ive only had to order 1 length of 65x65 as there is none at work and a length of 2" 4140 bar to use for the pins, oh and then bearings. Otherwise the rest so far has just been bits and pieces lol.

Got some 4" castors which my old man picked up for cheap. Not the ones I wanted as these are only rated to 160kg each, not the 300kg units I was spec'ing. But it will still be able to hold atleast 1200kgs. Though the rest of the frame will probably hold somewhere between 2000kg comfortably. God knows what you would put on it that could weigh that much though. His HR when stripped will only weigh about 600-700kgs. The whole car supposedly only weighs 1200kgs.

My engine didnt turn up today. So time to do some more on this project!

[XRATED]

This is the bush sitting in the shallow scallop. You can see the recess seat for the bearing to be pressed into. Should make it rotate quite smoothly and easily and wont have to worry about pumping it full of grease and having it ooze out everywhere attracting dirt and grit. The beauty of sealed bearings.

Do you want to knock up a second set of rollers/bearings and pins for mee, while your at it??

Cheers

Justin

[Craved]

Do you want to knock up a second set of rollers/bearings and pins for mee, while your at it??

Cheers

Justin

or a 3rd

[r33_racer]

Missed out fellas, no more 4" billets of 1020 lying around at work

Will be going in to work tomorrow to keep working on these bad boys. Went in to day to do some more to them and ended up helping my mates fit his process west 2.5 kit to his xr6turbz.

[Craved]

awww

[r33_racer]

So I got all of what ive done so far fully welded. I fitted the castors so its now mobile, thank god as its starting to get abit weighty.

There was some slight pulling from the welding and the vertical posts where the bushes go are leaning a little backwards. This meant I had to turn up a bar to hold the bushes inline with eachother when sitting in the scallops so they arent out of vertical or horizontal alignment. Seems to have worked quite well.

I also turned up some 50mm OD x 55mm long bushes to sit inside the ends of the castor mounts so the side wall wouldnt crush up when bolted and when loaded up with serious weight. I hole sawed out a 2" hole in the top face only so the bushes would drop in and sit on the bottom inside face and protrude by 5mm so I could fully weld around them, due to the obvious space constraints I could only weld around half the bush internally on the bottom face. I used grade 8 1/2" hex head bolts to fasten it all together.

Next stage is to turn up the pins and start working on the adjustable arms. Once I get that bit tacked up and I can swing it around I can figure how big I can make the missing support beam from the front of the vertical post to the front bottom beam. This is probably the most critical support which I want to make as strong as possible in terms of how far up and out it can go with out fouling the swinging attachments.

[Craved]

howd you go with this mike?

[r33_racer]

Havent actually done too much more on it lately. Been busy at work and Ive got my engine back so im sorting all that out to get it ready for assembly.

The 4140 50mm pins are turned up to suit. Some locking rings are done which can lock away at every 30 degrees. I had to extend the main vertical post by 250mm to make sure there was enough room for swing. I ah, miscalculated some minor details, but its fixed now.

Ive got material cut up and ready for welding for the attachments, but just havent gotten around to that bit yet.

[bigmikespec]

Great fab work Mick!

[XRATED]

updates mike?

[r33_racer]

updates mike?

lol. Still nothing at the moment.

I have everything ready to go, just need to find some time to actually do it. Though I will get pressed for it soon enough as my old man is getting ancy to start his HR build!

[r33_racer]

Been working on it again for the last few morning. They are nearly done finally. Just a few gussets to weld on and then roll up some big wheel shaped handles to turn the pin and she is done!

[Craved]

hell yeah! - scored some lengths of pipe that have about1.5mm of play each side internally that i'll be using to make a more povo version of this thing

need to turn one of my sprinters upside down for some reason

[Luke_ENR34]

where on the car they bolt to?

Im making up some brackets to go in the ends of the chassis rail so i can push the car around with the motor in but no running gear.

[r33_racer]

hell yeah! - scored some lengths of pipe that have about1.5mm of play each side internally that i'll be using to make a more povo version of this thing

need to turn one of my sprinters upside down for some reason

Good work. There is always a point in turning a car upside down!

The bearings in the main bush of this thing make it spin sooooo freely. It is quite silly and makes you laugh. I just want to turn it into a hammock now!