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  1. Hippo41

    Bearings inside an oven

    SKF make a range of bearings suited to very high temp operation - the VA 201/ VA 228 types. They have graphite lubricant and cages. Have you looked at them?
  2. Hippo41

    Wire race bearing design

    I'm sorry to enter this information late, but there is a German company called FRANKE that specialise in wire race bearings for this application. You can buy wire/ball sets and machine the races locally to yourself, or simply buy complete bearings from them. Lester Milton Telford, Shropshire, UK
  3. Hippo41

    Chinese bearing brands

    Don't knock yourself too hard Joe. I know Wafangdian quite well. There are 100's of bearing companies there! Sounds like yours is one of the older ones, but the same was said of Japanese beairngs not so long ago. Things will get better if people like you strive for improvement.
  4. Hippo41

    Chinese bearing brands

    I work for an importer and distributor that offers anything from "Tier 1" brands down to the very cheapest you can get. We like to think we give the customer the value or lifetime that his engineers require on the bearings, and at a price that satisfies the accountants. The comment above sums it...
  5. Hippo41

    THRUST BEARING 21000lb

    I'm sorry I am a little late to this, but you might still be looking for something. What you seem to have in your photo is a housing that contains a spherical roller bearing. Ask you local bearing guys for information on LinkBelt (probably the best known) or Blue Brute bearings - they will be...
  6. Hippo41

    Bearing type for a Jib Crane PIN

    A single tapered roller at the top, and a guide roller lower down (like a cam follower) on the circumference of your tower. What about a slewing ring?
  7. Hippo41

    Thrust ball bearing running surface

    Do you have heavy loads? What about plastic thrust washers? (Sorry - you've probably already thought of this).
  8. Hippo41

    Thrust ball bearing running surface

    Flat thrust washers, usually used for needle thrust bearings, should be available from your local bearing distributor. Is there any reason you can't use standard ball or needle thrust bearings?
  9. Hippo41

    Light instrument lubrication

    Your requirement of low friction would surely suggest an oil, rather than a grease? If these are instrument bearings then manufacturers like Timken MPB, Myonic or Barden will be able to offer excellent advice.
  10. Hippo41

    Ferrobronze alloy properties

    I have written it as it appears on the drawings/purchasing documents. Regret this is not my speciality - but I'm trying to understand a problem before I tackle ther factory engineers concerned who a) don't speak good English and b) would probably baffle me with science anyway. I am told by the...
  11. Hippo41

    Ferrobronze alloy properties

    Can anyone help me with the material properties of two alloys Fe+55%CuSn10+0.5%C and Fe+40%CuSn+1%C. Regret I am no metallurgist and I cannot find anything on the net. I'm trying to find out why some bearing bushings have failed prematurely. Any help would be greatly appreciated. Thanks in...
  12. Hippo41

    Grease Code

    The following site suggests that Mobil 28 and Aeroshell 7 are the two greases suited to the 2 MIL specs you have. Hope it helps. http://www.rbcbearings.com/designeng/RBC-Aero-re.pdf
  13. Hippo41

    how loose is loose?

    Most of what needs to be said has been said, but:- Shaft and housing tolerances are specified by the bearing manufacturers for a reason. Following their guidelines you will probably achieve optimum performance under normal conditions. ROundness of the seats is as important - and there are...
  14. Hippo41

    Bearing speed ratings

    Suggest you talk to GAMET Bearings in th UK who specialize in machine tool bearings. Lester Milton Telford, Shropshire, UK
  15. Hippo41

    Waste Removal From Railcars

    Just a thought - this isn't really my forte. To unload sugar cane from rail cars they have a number of chains attached to a bar along the side that stretch from side to side and down into the car. To unload the cane they just pick up one of the bars with a grapple which lifts and traverses the...
  16. Hippo41

    Large bearing with grease or oil?

    The ndm (speed in rpm x average diameter) works out at 225 000. This is at the upper level of normal lithium or lithium calcium EP2 bearng greases. I would suggest you look at something a little bit "above average". I have used FINA CERAN HV in sugar mills which have similar operating...
  17. Hippo41

    Bearing 1500 RPM @ 260¦ C

    Why make things so complicated? The SKF deep groove ball bearings for extreme temperatures don't go to 100mm shaft sizes. But you can get heat stabilised bearings (usually spherical roller bearings) for extremely high temperatures. Your main problem will be to keep the lubricant cool (and in...
  18. Hippo41

    How fast technology changes

    Nobody seems to have mentioned fax and e-mail machines. To get an urgent drawing from Johannesburg over to Europe we had to drive to the airport to put on th enext available flight - then wait 2 weeks for a reply. The enquiry went via telex. Then faxing made things a little easier (for small...
  19. Hippo41

    Water Vapor in Bearing Cavity

    Labyrinth and Taconite seals are better than felt or rubber as you can maintain a steady flow of grease into the labyrinth to form a seal using some simple gas charged grease dispensers. Lester Milton Telford, Shropshire, UK
  20. Hippo41

    Chrome Plated Ball Races

    Interesting - I stand corrected. Thanks! Lester Milton Telford, Shropshire, UK

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