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Type: Posts; User: Robert R

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  1. Replies
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    This is the web page for the full specification...

    This is the web page for the full specification for SKF tapered roller bearings:


    Designation system

    SKF only makes tapered roller bearings to the P5 standard in metric sizes and to the 0 and...
  2. Replies
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    There is one other explanation. SKF is not...

    There is one other explanation. SKF is not manufacturing the bearings to the P4 specification. The bearing distributors may have discovered that many of the wheel bearings do meet the specification....
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    No. SKF precision roller bearing...

    No.

    SKF precision roller bearing identification codes begin with a N design code. For example N 10 12 R TNHA/ HC5 SP

    In this example the SP code identifies the bearing with a P4 class...
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    Yes, the filter bags will burn. The high air flow...

    Yes, the filter bags will burn. The high air flow will not extinguish the fire.

    The filter relies on the multiple bounces of a spark as it passes through the collection hose and the bottom dust...
  5. When a bearing fails and locks up the spindle can...

    When a bearing fails and locks up the spindle can continue to rotate by sliding between the shaft and inner race ID surface. There will be significant heat generated and initially very little play.
  6. The chocolate ball mill machines, judging from a...

    The chocolate ball mill machines, judging from a duckduckgo search all seem to be made in Europe or Asia.

    The Packint mill is made in Italy. Their website is :About Us | PACKINT

    This is a...
  7. If there was air mixed in with the melt it would...

    If there was air mixed in with the melt it would tend to expand at the first opportunity and force the melt out of the spout. I see what appears to be a pneumatic operated ball valve below the spout....
  8. This grinding web site has a list of the books...

    This grinding web site has a list of the books that are available.

    ABRASIVE ENGINEERING SOCIETY

    Click on the books tab on the home page.

    My first recommendation for a how to do it book...
  9. Replies
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    I moved the Okamoto with the oil remaining in the...

    I moved the Okamoto with the oil remaining in the base using two tie down straps with the base sitting on two 4"X4" X 4ft wood standoffs. There were nailed wood blocks to prevent the grinder from...
  10. Replies
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    The grinder has a automatic down feed operating...

    The grinder has a automatic down feed operating mode. The amount of down feed for both manual and automatic operation is controlled by a small screw on the right of the hand wheel casting. The...
  11. Line reactors are used when VFD drives have cable...

    Line reactors are used when VFD drives have cable runs of more than 50 feet to the motor to reduce the voltage spikes The Teco VFD manual describes how they are sized and when they are needed. A...
  12. Replies
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    Hello MZH: My memory of what I did wrong on the...

    Hello MZH:
    My memory of what I did wrong on the Okamoto move has improved a bit.

    When you load the grinder on the truck bed with a forklift the grinder is placed on two 4x4 wood standoffs to...
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    The four rubber caps on the left and right sides...

    The four rubber caps on the left and right sides can be removed to install lifting bars for lifting with a crane or you can lift from the bottom with a fork lift.

    There were shipping clamps...
  14. Hello Snowman: I have attached a description...

    Hello Snowman:

    I have attached a description of the closest match diffusion pump I could find to the pump that you purchased. I suspect that your diffusion pump will have a 400 watt heater and a...
  15. The pump stand is roughly 1/2 century in age. ...

    The pump stand is roughly 1/2 century in age. The plumbing style was used by the Vacuum Research Corporation and later by Varian for their leak detectors.

    The diffusion pump is air cooled with...
  16. There is not much involved. Your lab probably...

    There is not much involved. Your lab probably already has a 7 cc to 40 cc capacity electron beam evaporation source and power supply sitting on the shelf. The source is run at low power with a beam...
  17. Snowman are you planing to melt platinum in a...

    Snowman are you planing to melt platinum in a electron beam heated copper crucible and then cast the melt into a mold?

    If so I suspect you will need a taller chamber. The height of the top of the...
  18. On behalf of the thousands of happy and well...

    On behalf of the thousands of happy and well adjusted diffusion pump users worldwide I would like to take a few paragraphs to address the besmirchment of our loyal friend.

    The choice of a...
  19. DO NOT clamp a vacuum chamber lid or door leak...

    DO NOT clamp a vacuum chamber lid or door leak tight closed. It is very dangerous. The risk is that when venting the chamber with N2 from a gas bottle or the facility supply line the pressure...
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    The hydraulics schematic for the 618...

    The hydraulics schematic for the 618 micromaster. grinder is shown below. . It may provide a clue as to what is wrong with the 1236 The cross feed direction valve would be the first thing to check....
  21. [QUOTE=dgfoster;3359756] So, my question is...

    [QUOTE=dgfoster;3359756]

    So, my question is how difficult and expensive would it be to design and build a 5KW 1000Hz power supply and heater coil? Is this potentially feasible and reasonably...
  22. The hydraulic cross feed cylinder may be attached...

    The hydraulic cross feed cylinder may be attached to the grinder base with springs or a hinge mechanism to allow some piston rod misalignment.
  23. I was not expecting a direct hydraulic piston...

    I was not expecting a direct hydraulic piston cross feed mechanism for the Jakobsen grinder.

    The connecting link between the piston rod and the table should have a sliding motion to prevent the...
  24. We need more information. What happens when...

    We need more information.

    What happens when you crank the crossfeed by using the handle? Is there more resistance to motion at either end of the table travel?

    Is the problem recent or has the...
  25. This is a job for vacuum brazing using one of the...

    This is a job for vacuum brazing using one of the silver solder pastes to attach the membrane to the support ring. You are not limited to metals for the diaphragm. For example, capacitance type...
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