Disc brake conversion

[exbedford]

Just a query about the common HQ disc brake conversion. It seems clear that many perople using HQ discs on latter model stub axles are using ford bearings in order to not require machining of the disc to suit bedford bearings. However, I have researched the sizes and found that the ford bearing ID is too big. It is 21.98mm ID whereas the bedford stud id 21.43mm diameter. So instead of using the ford bearing (LM12749), the correct bearing is the Pontiac transam bearings which is a perfect fit (LM12748)  21.43mm ID 45.237mm OD. Can anyone confirm this? It seems there is a lot of talk on here about bearing numbers but has anyone actually measured and checked sizes. The ford/potiac cup is the same (LM12710). I know the lm12748 is not common in Australia, but it would be worth paying a little extra for the correct bearing right.
 

[restoreid]

It depends on what stubaxel you have everdently there are 2 sizes mine was the large 1inch diameter stub & falcon bearing was perfect Mine is a 1976 model

[exbedford]

Yes, there are two stub axles. The outer bearing ID is different. One (the pre june 1973 model) is 1 inch diameter, the other post june 1973 is 27/32 of an inch (21.43mm).

 It seems if people are using the ford bearings they are using the worng ones. Yes , they do appear to fit well, but if anyone can tell me thay they are a perfect fit, i suggest they remove their bearings and check the slack between the bearing and stub axle shaft. Half a mm of play does not make a perfect fit. The LM124749 is the ford bearing = 21.96mm ID.

[Gordon]

I've just put a vernier on an old outer wheel bearing off my 78 SWB that I had lying on a shelf in the workshop and the ID is a shade under 26mm. Am I confused 

[restoreid]

Hi exbedford I have checked back in my posts on my brakes & I used xe falcon INNER bearings which are the same as standard bedford inner bearings & i used standard bedford outer bearings & machined the hub out to suit Same as the castlemain HQ deal only I used VH commodor hubs & the xe falcon bearing fitted perfect no machining just had to get a inner seal to fit as the bedford seal had too big OD to fit VH hub Any bearing place could doo that Honestly dont know why your stuffing around with HQ stuff The brakes on mine are fantastic & getting better with use Cheers Reid

[Melrich]

Sorry for my ignorance/inexperience.
But I would like a question answered please. I know it's probably been answered before, and it will be common knowledge to most of you.
Question is: I have purchased a 77 CFS Beddy, it has a disc brake front end. HQ I think.
Does it need an engineers cert for a blue slip for rego.
Thanking you all muchly in advance.
Thanks.
....Rich....

[ben]

Does it need an engineers cert for a blue slip for rego.

technically yes:) why i say that i dont know anyone with an engineers for there disc brakes. id suggest the reason people get away with it is it looks standard and every car has disc brakes dont they?

[wendyh]

yeah it depends who u take it too...as some guys wouldnt even know what is standard on a beddie  .......common sense would tell u disc over drums are far safer...

[Melrich]

Thanks heaps !!!!
Very much appreciated. I'll wing it and see what happens on Thursday, thats when booked in for blue slip.
Thanks heaps, I was starting to panic a bit.
Will see what happens now.
Ta
Cheers.
....Rich....

[cords]

Does it need an engineers cert for a blue slip for rego.

technically yes:) why i say that i dont know anyone with an engineers for there disc brakes. id suggest the reason people get away with it is it looks standard and every car has disc brakes dont they?

i have one