Scheppach Basato 5-2 blade bearings

[Agrue]

I've recently purchased a second hand Scheppach Basato 5-2, and was wondering if anyone here had experience with replacing the blade guides? The ones I have are all pretty worn - it looks like both of the thrust bearings have jammed at some point and the blade has shredded them. I've looked into getting spares, but they're pushing £200 a set, which is obscene for a wear item.

I'm looking at modifying my bandsaw to use standard 6200-2RS ball bearings, which are a much more reasonable £3 each. I've looked about a bit, but can't find an aftermarket set that will fit. I'm also struggling to find a consensus as to which part of the bearing the blade should ride on. The Carter etc mods seem to prefer using the edge of the bearing, but Matthias Wandel has some convincing arguments on using the face fo the bearing.

Has anyone done any work on this sort of thing before? Some advice would be greatly appreciated.

 

[Alexam]

Try Steve - https://www.youtube.com/watch?v=6v2udCG6HQw

 

[Agrue]

as an update, I'm looking into modifying the existing blade guide body. I'm planning to file out the side bearing holes so they'll accept 1/2" cool blocks, and turn down the existing rear guide holder so it'll take an skf 6002zz bearing (with the hole tapped out m10 to take a retaining bolt). Can anyone see any flaws in this plan before I start cutting things up please?

I've modelled something up in CAD, but apparently my account doesn't have permission to post links or pictures yet

 

[marcros]

another post and you can post links and pics

The price of bearings from the OEM doesn't shock me, but surely they ae a standard size that a bearing factor would keep?

i prefer bearing supports to cool blocks. I would consider changing to bearings, but wouldn't be keen to go the other way.

 

[Agrue]

While the oem bearings will work fine, I don't think they're the best design and there's no way I'm shelling out £200 for what is essentially a wear item. I suspect the originals have had a hard life, but even if they last ten years, I'd rather have a cheaper option that I'm sure works equally well, and I'm confident will require less maintenance.

The originals aren't ball bearing types, they're just a round wear face on a small shaft, that fits inside what looks like a brass housing. Since they're not sealed I think they'll need fairly regular maintenance. Apparently this is where the cost comes from, as each wearing face must be matched exactly to the housing to get the tolerance right, so you have to buy both. I'm pretty sure this is rubbish anyway, you can machine whatever tolerance you require. I'm really begrudging spending a load of money on what boils down to manufacturer cost cutting.

 

[Agrue]

and finally the image:



I think this design might struggle slightly with the largest (25mm) blade. The exact size of the teeth etc on the model were a guess based on a picture. I'm not expecting to use a full size blade very often though.

The oem bearing was 34mm diameter, the thrust bearing here is 32mm.

The cool blocks with have an m8 bolt to retain them, which is shown as screwing in from the front, but I think I might move this to the back where it's not so thin. I'm wary of reducing the existing material so much when I don't really know the loads that will be applied.

EDIT: this is the original guide setup, the groove in the wear faces was just me working out where the blade was based on the old worn out guides.:

 

[marcros]

your bandsaw, your choice.

I agree that it isn't worth paying £200, but my point was that they are probably available for a tenner from bearing boys, simply bearings etc. I cannot find the size online though to look.

I did find this thread which you may or mayn't have seen

scheppach-basato-5-2-bandsaw-t58336.html

 

[Agrue]

they're not a standard bearing, is the problem. It's a machined part, just a disc of metal on a shaft. These are the ones I removed:

EDIT: I just noticed that my desk is minging

I found that other thread while searching, but it wasn't of much use. The advice given was that the original bearings should be okay if maintained properly. My bandsaw was second hand and the oem bearings are already ruined. I could just get new oem ones (and again, I'm sure they're fine), but they're £200 a set. I only paid £300 for the saw. I thought about posting in that thread, but didn't want to resurrect one from 2012.

 

[marcros]

ah, my mistake. I agree that it is a ridiculous price then.

 

[JakeS]

I could just get new oem ones (and again, I'm sure they're fine), but they're £200 a set.

I'd have thought you could find a local engineering place and have them make you entirely new ones from scratch for less than that!

 

[Steve Maskery]

IIRC the face of the thrust bearing is are hardened, so if the problem is that it is scratched you should be able to grind it flat again, at least as an interim measure.Using the face of a bearing as a thrust surface works well, I've never had a problem with it.

As to cool blocks, great for really narrow blades (<= 3mm) but I would prefer bearings for normal and wider blades.

 

[Agrue]

the two thrust bearings have worn pretty much all the way down (the left hand one in my previous pic). I could possible reuse the two side bearings, but replacing them with standard bearings would be problematic as the blade would grind on the centre of the bearing - the oem ones have recessed centres.

I think long term, once I have a better idea of what I need from a bandsaw, I'm going to have to replace the block that holds the bearings entirely. For now I'll continue on with a standard bearing for thrust, and cool blocks for the sides (it's a much easier mod than using standard bearings for the sides too)

 

[Claud1]

Hi,
Everybody has their own views on how to set up a bandsaw and I think that Steve knows what he is talking about but I do think that the way Bandsaws are advertised as Resaws etc is misleading. I have had more the than 12 different bandsaws in 42years and I have come to the conclusion that provided the saws are set up correctly they will do the job but one thing I do know is that you must not feed the timber too fast which I don't think is mentioned in the adds ( it is all about sales ) I have now got 2 industrial machines and could not be more happy. As to the Basato guides and others of the same Type I can only say they are rubbish. over the years I had the Basato I spent half as much on guides as I did on the saw when I bought it new ( horses for courses ) It all depends on what you want in the end.