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Thread: Help with jointer rebuild
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15th Jun 2020, 10:52 AM #1Senior Member
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Help with jointer rebuild
Hi.
I have a 6" jointer/planer that I am rebuilding...Recently I measured the bearings and was quoted $18 ea..When I arrived at the bearing place, with the actual bearings in hand, I was told that they were an angular contact type bearing.. a sort of cross between a regular and a thrust bearing..(LJT 7/8) and was shocked by the price ..$68 each.!!
If anyone else has rebuilt a planer, what bearings did they use... normal deep groove, or these hybrid types.
Ken.
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15th Jun 2020, 11:42 AM #2Senior Member
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You should be able to get them cheaper online.
Do you have the bearing numbers?
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15th Jun 2020, 04:08 PM #3Most Valued Member
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If I am correct in my assumptions, that would be an LJT 7/8" bearing. Imperial bearings are generally more expensive than metric bearings. There seem to be a few floating around Ebay at a lower price, but the freight component brings them up to pretty close to the same as what you will pay for the locally sourced version. I know every dollar counts, but those bearings will do a lot of work in their lifetime, so it probably pays to bite the bullet and stick with the correct bearings.
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15th Jun 2020, 04:36 PM #4Most Valued Member
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Angular contact bearings tend to be significantly more costly, but allow for a proper directional preload which a deep groove does not generally deal well with. A real answer to this is going to depend on how the bearings are preloaded, were there spacers between the inner or outer bearing races?
My advice would be to put in what you take out unless you want to redesign something.
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15th Jun 2020, 09:01 PM #5Gear expert in training
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I can't say I understand why you'd need angular contact bearings in a jointer, there's no axial load at all (unless something's gone very wrong) and there was no preload on either the jointer or thicknesser bearings at my old work; we upgraded to helical heads on both so I have had both machines in pieces.
I don't remember what bearings we used for the rebuilds, but, if anything, I'd be going for a standard deep-groove on the drive end and a self-aligning bearing on the other end to allow for any misalignment of the housings.
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15th Jun 2020, 09:14 PM #6New Member
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Recently had my Hammer A-31 jointer/planer apart and replaced both bearings when installing the new head. Both felder supplied deep-grooved @$14.32 ex GST each.
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16th Jun 2020, 07:59 AM #7Senior Member
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Just use normal deep grooved ones, I’ve done a few over the years amd they are all still running fine as far as I know.
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16th Jun 2020, 08:21 AM #8
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Grahame
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16th Jun 2020, 08:54 AM #9Senior Member
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Haven't really tackled the jointer here, as still fixing broken bits on a few hundred kilo of toppled over thicknesser. The bearings ordered here were 6202/03 for the jointer, which Mr Google tells me are deep groove.
Imperial bearing suggests it's a fair age - old Wadkin(?) - probably ebay and lots of time for NOS, if you were trying to get them cheap(er). We've been using Statewide for bearings recently, maybe they're worth a shot if any branches up there, but for a special, doubt there's going to be huge variances!
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16th Jun 2020, 02:06 PM #10Senior Member
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No preload.. they sit in housings on either side of the cutter head... in fact they (to me) were installed incorrectly.. the thrust side of the bearing was facing inwards.
I always put back in the same as what I remove.. but we dont know if these were factory fitted.
I also agree with elanjacobs... regarding the lack of axial load.
BTW.. it's a Aussie made ? Pioneer... cannot find any reference to them at all !
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16th Jun 2020, 08:07 PM #11Senior Member
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Did it look like this ? 85566DD9-9DFB-4B2D-8B27-E5408E55190A.jpeg
We had this planer for 50 years, changed the bearings once from memory, it was sn absolute beauty of a machine, nice long bed and good adjustments. I sold it recently as it was getting too small for the work I’m doing now. You’ll get good service out of it I’m sure.
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16th Jun 2020, 11:10 PM #12Most Valued Member
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If there was no preload then yeah deep grooves will be fine.
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17th Jun 2020, 08:25 AM #13Most Valued Member
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Some time back I was gifted a Gilbros saw bench/planer combination. I replaced the bearings in the planer head and from memory they were nothing special. I bought good quality japanese bearings in it for next to nothing from an eBay store.
They were imperial.
Simon
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