K Series Spigot Bearings - There must be a better way!

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oilyhands
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When I fit a spigot bearing and sleeve I fit the bearing to the sleeve and then turn the outside down by a few thou in the lathe, its tricky to ensure it is concentric, but it works just fine, the sleeve is then a lighter interference fit to the crank and can be removed more easily if required.

Oily

Wrightpayne
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Andrew,

years ago I fitted one from QED and it wasnt very tight at all - I had to loctite it in (since changed again)

I did feed back to QED and it could have been a one off ?!

I like the oil lite / phosphor bronze suggestion - a fallback for when the sleeves are no longer available!

Regards

Ian

revilla
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OK so this lunchtime I popped round to QED and bought one bearing and one sleeve to compare. Results are interesting:

That's a lot better!

Oddly the bearing they supply is also marked as INA with the same part number, but it is smaller (21.00mm vs. 21.08mm) and somehow looks different. I wonder if got a fake INA bearing before?

The sleeve is thinner (0.50mm vs 0.60mm), with both a larger ID (20.96mm vs 20.90mm) and a smaller OD (22.00mm vs. 22.16mm).

When not installed in the crank, I can actually push the bearing into the sleeve with my thumbs. It's a tight-ish fit and will no doubt be a lot tighter when the sleeve is slightly compressed in the crank bore, so I think everything will be retained firmly.

Just to set the record straight, when I checked the original bearings I bought came from AutoDoc, were LUK branded on the box but INA branded bearings inside. The original sleeves I bought were from Redline, I guess supplied through Caterham. I'll mention the dimensional issues to Chris. the QED parts are these:

https://qedmotorsport.co.uk/product/crank-spigot-bearing-for-ford-gearbox/

https://qedmotorsport.co.uk/product/spigot-bearing-bush-to-take-ford-gearbox/

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

revilla
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QED bearing and sleeve installed this evening. I left them in the freezer for the afternoon but didn't bother to heat the crank. They tapped into place firmly but without excessive force. I think they would be rather more likely to come out with a puller or slide hammer than the ones I have been fitting. All felt a lot better. The first motion shaft engages normally with the bearing and turns smoothly, as shown in this video: https://youtu.be/h3zRPJvqkho

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

rj
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Andrew,

Dry ice is the answer to removing them :-p

tbirds search:

Blatchat Google Search

revilla
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Just fitted another three sets this morning, all from QED and all measured the same as the previous set from QED. All went in relatively easily, all three still take a first motion shaft that turns nicely.

@Regin - If I ever have to pull one out again (heaven forbid!) and they play hard to get (I think these ones will be a lot better) I'll give that a try.

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

revilla
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Just fitted another three sets this morning, all from QED and all measured the same as the previous set from QED. All went in relatively easily, all three still take a first motion shaft that turns nicely.

@Regin - If I ever have to pull one out again (heaven forbid!) and they play hard to get (I think these ones will be a lot better) I'll give that a try.

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

revilla
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Just encountered exactly the opposite problem ...

Bought four sets of sleeves and bearings from QED.

Tapped the first one home into the first crankshaft, went in nicely, a gearbox input shaft slips into the spigot bearing and turns nicely, all good.

Came to put the second one in and it slipped in easily with just a finger, and came out the same way! I tried the other two, they were all the same, so it's this crank that's odd and not one bearing.

I think I'll try a sleeve from Caterham on this one, and if it's still not tight enough I'll have to use some bearing fitting compound.

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

oilyhands
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Andrew, if the sleeve is loose then disrupt the surface all over with an auto centre punch, this will raise the surface a little (in a similar way to knurling), then fit with bearing fit. This will give it more purchase on the housing.

Oily

oilyhands
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I have made a few Colsibro bushes as replacements for spigot bearings when I havent had them to hand. They seem to work just fine, they take a while to make though..

Oily