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GTJim
21-06-2012, 10:26 AM
Can anyone tell me where I can get THK LM rail in the UK at a reasonable price.

Jim

Jonathan
21-06-2012, 01:04 PM
I don't think you can put THK and reasonable price in the same sentence unless you include eBay.

GTJim
22-06-2012, 08:18 AM
Jonathan I understand these are not going to be cheap but I need to find a supplier that will respond to my emails and give me a quote.

blackburn mark
22-06-2012, 10:56 AM
Can anyone tell me where I can get THK LM rail in the UK at a reasonable price.

Jim

are you just looking for the rails ? or rails and bearings?

i managed to get 4 NSK LH20 bearings new for 16 but couldnt for the life of me find any matching rail :(

its a nightmare trying to get good rails at a reasonable price, ebay and a shitload of patience is your only real option unless your loaded

i managed to get new THK-HSR25's (bearings and rails) off ebay for my X and Y for about 400

THK-HSR20's used off ebay 110 for my Z (ebay, Istanbul)

its worth doing an international search on ebay (it felt a tad risky buying from Istanbul but it all ended well)

blackburn mark
22-06-2012, 10:58 AM
ah... sorry, cant help you there

vigen20
22-06-2012, 12:05 PM
Hi
are you still looking for THK linear components?
if so, send me the type and length of rails you require I will get you a quote from my home country if you want.

Jonathan
22-06-2012, 01:40 PM
Other manufacturers are dimensionally compatible to THK, so does it have to be theirs?


its a nightmare trying to get good rails at a reasonable price, ebay and a shitload of patience is your only real option

That's my tactic :) Still not found the two 2100mm (ish) rails I need for my X-axis.

vigen20
22-06-2012, 02:27 PM
I am getting Hiwin carriages and rails:
1000mm of HGR-R-H rail for 53 pounds
HGW25HCZOH for 47 pounds :)

are these prices reasonable?

Jonathan
22-06-2012, 05:32 PM
I am getting Hiwin carriages and rails:
1000mm of HGR-R-H rail for 53 pounds
HGW25HCZOH for 47 pounds :)

are these prices reasonable?

Price for the blocks is about normal:

http://www.wmh-trans.co.uk/Products/HIWIN_HGW_GUIDE_BLOCK_SIZE_25

At the same place 1m of rail is 65+vat (http://www.wmh-trans.co.uk/ProductGrp/00010001000100010003). Where did you get those prices?

GTJim
25-06-2012, 08:58 AM
Other manufacturers are dimensionally compatible to THK, so does it have to be theirs?

Well I've got THK blocks and assumed that I would need thier rails, but if thats not the case all the better.

Jonathan
25-06-2012, 09:02 AM
Well I've got THK blocks and assumed that I would need thier rails, but if thats not the case all the better.

Unfortunately not - each manufacturer's blocks will only work with their own rails. I meant that the hole layout and external dimensions are generally compatible.

vigen20
25-06-2012, 01:34 PM
Price for the blocks is about normal:

http://www.wmh-trans.co.uk/Products/HIWIN_HGW_GUIDE_BLOCK_SIZE_25

At the same place 1m of rail is 65+vat (http://www.wmh-trans.co.uk/ProductGrp/00010001000100010003). Where did you get those prices?

I am getting mine from East Europe just like other components that are cheaper, some of them are about 50% of a price of UK suppliers.

GTJim
25-06-2012, 03:38 PM
I am getting mine from East Europe just like other components that are cheaper, some of them are about 50% of a price of UK suppliers.
Hi vigen, where about do you get your THK rail from. As I was looking for a pair of LM rails approx 1500mm long suitable for SHS25 bearing blocks and similar length pair of rails suitable for SHS20 bearing blocks.
Jim

routercnc
26-06-2012, 01:43 PM
Hi GTJim

http://stores.ebay.co.uk/FA-SYSTEM_L...34Q2ec0Q2em322

As posted in another thread a while back I've bought a couple of used profile rail and bearing sets from the above link. Been happy with the service and component quality. These are all used, hence the fairly reasonable prices.

If you are patient on ebay you may find cheaper, but if you want to get on with it then have a look through their store.

Thanks

Jonathan
27-06-2012, 09:40 PM
ive took a chance and bought some used rail off him sr15 for my y and z,just need the right lengths for my x axis to come up and im on my way..

Should have waited and bid on it...his prices are OK but you'll do much better by bidding, unless you're really tight for time. What length rail did you get for Z?

Jonathan
27-06-2012, 11:28 PM
yes i should have waited,too impatient ,im not even sure it will be up to the job, i bought a little over 400mm for the z and about 1200mm for the y with the mind to cutting it down if need be as i still cant committ to a size of machine or design.

Don't cut it - use the extra length to space the bearings out further. Normally the force on each bearing is inversely proportional to the spacing, so you want to space them out as far as you can (within reason, assuming what they're mounted on is stiff) to reduce the load on each and thus reduce the deflection. I got two 1150mm (hiwin HGH15) rails for my Y-axis, which is only 760mm travel but I wont be cutting the rails.


ive only managed to find 1 working machine using it on his z and y axis,great little machine but he has 4 lengths of sr15 on his y axis alone.

He's probably used 4 as unlike most of the good rails the SR series does not have an equal load rating in all 4 directions - http://www.thk.ru/cataloguespdf/sr-300e_cc.pdf ... but since you've already bought them I wouldn't worry about it - any profile rail is going to be a huge amount more rigid than the SBR20 rails you currently use.

Jonathan
28-06-2012, 07:44 PM
thanks jon
just got to source some 20mm rail for the x then i can crack on.

What length do you need for X? I wouldn't worry about finding 20mm for your size machine and what you're cutting, 15mm will still be fine. You would get marginally better stiffness with larger rails, but I'd put money on other aspects of the machine contributing a greater error than the difference between 15mm and 20mm rails. There's no significant disadvantage to using bigger rails though, so if you do find some cheap then why not...


i was just looking at the korean chaps shop,i didnt get the option to bid or make offers,he must have knocked that on the head.

I meant just search on eBay (worldwide) in general. Rails long enough for Z and Y come up quite regularly, but you might struggle for X.