Outer Limits 4x4 Board

Hi there, just wondering if you guys fitted crush bushes to the sill prior to boltig your sliders up. Or is the sill strong enough to just run the bolts through and tighten up.
Cheers

kitacooch wrote:Hi there, just wondering if you guys fitted crush bushes to the sill prior to boltig your sliders up. Or is the sill strong enough to just run the bolts through and tighten up.
Cheers

I used crush bushes (came with the slider kit I brought). Ill have to cut the sills if I ever want to get them out again though. Was a prick to put them in and then make sure they didn't drop into the sill. I would recommend using them though. Best safe than sorry.

I used crush tubes also. I think you'll damage your sill if you dont.

I didn't, but was crushing the inside of the sills with the nut,
need bigger washers namely plate steel

cheers guys, looks like crush tubes it is.

and where abouts do u buy these crushed tube?

6.2troopy wrote:and where abouts do u buy these crushed tube?

Just use pipe, diameter to suit bolt and cut to length.

Bush65 wrote:

6.2troopy wrote:and where abouts do u buy these crushed tube?

Just use pipe, diameter to suit bolt and cut to length.

Please explain...where do they go etc, inside the sill?? or somwhere else?

CHEERS TIM.

TimRover wrote:

Bush65 wrote:

6.2troopy wrote:and where abouts do u buy these crushed tube?

Just use pipe, diameter to suit bolt and cut to length.

Please explain...where do they go etc, inside the sill?? or somwhere else?

CHEERS TIM.

For horizontal bolts that fix the sliders to the sill - the bolts pass through the sill from the outside to the inside.

Because the sill is thin wall, hollow construction, it will crush when the bolts are tightened, unless the sections of pipe are fitted.

Drill the inner and outer walls of the sill where the bolts are required. Make the holes in the outer wall large enough for the pipe to slip inside the sill. Cut the pipe so the outer end is flush with the sill when the inner end of the pipe is hard against the inner wall of the sill.

Optionally weld the pipe inside the sill - weld between the pipe and the outer wall of the sill.

Bolt the slider to the sill, fit large plate washers under the nuts on the inner side of the sill. Now the bolts can be tightened securely, without crushing the sill.

Calling these crush tubes is incorrect - they probably should be called anti-crush.

Proper crush tubes are used for applications like pre-loading taper roller bearings in some differentials, and the like. These tubes are designed to crush at a particular compression load. They remove the need for precision spacers to prevent over/under loading the bearings.

Thanks Bush65, now it makes sense

CHEERS TIM.

would be best to make the sliders to bolt around the chassis much stronger, better protction & easier to remove

what happens if you lnad real hard on the sliders that are bolted to the sills? the sills bend under the pressure rendering the sliders useless imho
makes them about as useful as alloy side steps

OGJON wrote:would be best to make the sliders to bolt around the chassis much stronger, better protction & easier to remove

what happens if you lnad real hard on the sliders that are bolted to the sills? the sills bend under the pressure rendering the sliders useless imho
makes them about as useful as alloy side steps

Chances are if you're going to land that hard you would bend any chassis mounted slider into the sill anyway. I've abused mine quite a bit but I don't make a habit of jumping into piles of rocks. I have plenty of situations where a wheels slid out of position and landed hard on the sill and no damage except for my head on the window frame .



The above sliders are the same type as mine. They wrap around the sill rather than just bolt on one side, and the u-section with the aid of anti-crush tubes make it very difficult to distort the sill. Friggen heavy but.

stuee wrote:

OGJON wrote:would be best to make the sliders to bolt around the chassis much stronger, better protction & easier to remove

what happens if you lnad real hard on the sliders that are bolted to the sills? the sills bend under the pressure rendering the sliders useless imho
makes them about as useful as alloy side steps

Chances are if you're going to land that hard you would bend any chassis mounted slider into the sill anyway. I've abused mine quite a bit but I don't make a habit of jumping into piles of rocks. I have plenty of situations where a wheels slid out of position and landed hard on the sill and no damage except for my head on the window frame .



The above sliders are the same type as mine. They wrap around the sill rather than just bolt on one side, and the u-section with the aid of anti-crush tubes make it very difficult to distort the sill. Friggen heavy but.

Stuee,
do you find that you hit your legs on the sliders geting in and out of the car.
As Mine dont have the extra bit on the right hand side, of the photo of your type.