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Type: Posts; User: Robert R

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  1. Replies
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    There are a number of companies that manufacture...

    There are a number of companies that manufacture nitrogen generators that remove the oxygen from the air flow by using either zeolite gas adsorption or membrane filtration.The membrane systems...
  2. Do a internet search using the phrase " rubber...

    Do a internet search using the phrase " rubber bearings building" or "rubber bearings bridge".

    A thick rubber pad will have compliance in both the vertical direction and shear. The vertical...
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    Type in the search phrase " boundary layer...

    Type in the search phrase " boundary layer lubrication" in a DuckDuckGo search.

    The journal that you are working with is supported by boundary layer lubrication rather than hydrodynamic...
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    Hypoid and spiral bevel gear sets are lapped to...

    Hypoid and spiral bevel gear sets are lapped to correct tooth geometry after heat treatment. The goal is to reduce gear mesh noise and improve load capacity. The process involves either lapping the...
  5. The gear reduction unit can be removed from the...

    The gear reduction unit can be removed from the block spindle and replaced with a direct drive motor. The Setco block spindle (?) shown has two pairs of angular contact bearings with a high preload...
  6. There needs to be some preload to insure that...

    There needs to be some preload to insure that the spindle load is equally shared by all the rollers in the bearing. The bearing assembly stiffness is also determined by the bearing preload. A higher...
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    The journal bearings on a grinder are designed to...

    The journal bearings on a grinder are designed to have a very low eccentricity while running. The eccentricity is the offset distance between the center line of the journal and the center line of the...
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    A old Baldwin hydraulic universal testing machine...

    A old Baldwin hydraulic universal testing machine would do the job. The hydraulic ram is 12 inches in diameter or larger depending on the model. The top and bottom platens would need to be...
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    The Delta rotary table grinder has a fine feed...

    The Delta rotary table grinder has a fine feed increment of 10 microns. It does not have the accuracy that you need for setting bearing preload using shims.


    Your work involves assembling...
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    A search on the forum using the keywords "roll...

    A search on the forum using the keywords "roll mill kpotter" will bring up the thread discussing the construction of the roll mill. You will need to email Kevin to find out what accuracy his roll...
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    Buy a hand operated 6" wide jeweler's roll mill...

    Buy a hand operated 6" wide jeweler's roll mill from PM member Kevin Potter. The roll will allow you to squash the shim to the correct thickness.

    Keep in mind that the shim stock was produced...
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    One example of extrusion honing is the finishing...

    One example of extrusion honing is the finishing of the interior of aluminum intake manifolds. The manifold is bolted to a fixture plate and the slurry forced through the interior channels with a...
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    Flash Pasteurization occurs at 71 deg C for a 15...

    Flash Pasteurization occurs at 71 deg C for a 15 second duration. Bulk Pasteurization occurs at 66 deg C for a duration of 30 minutes Pasteurization kills many but not all of the food borne...
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    The porcelain standoffs used in high voltage...

    The porcelain standoffs used in high voltage electronics all have threaded inside diameters. The threads range from 6-32 up to 1/4-20 in the sizes that I have used. The threads have sharp peaks and...
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    The cheap solution: Make a long hollow...

    The cheap solution:

    Make a long hollow cylindrical holder with a front and back row of four radial adjusting screws to fit the headstock taper. This could also be a thick wall pipe with set...
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    There is a forum member called "ASQL2580" that...

    There is a forum member called "ASQL2580" that does this kind of work. The thread to look for is titled "Fanuc 18 instability" His employer uses a air bearing supported chuck mounted on a Moore G18...
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    Military aircraft are designed to be unstable....

    Military aircraft are designed to be unstable. The design enables the aircraft to respond rapidly to pilot commands and perform the aerobatics that you see at the air shows

    Passenger planes are...
  18. The following patent describes a low friction...

    The following patent describes a low friction solenoid driven plunger with 2 inches of travel. This is a interferometer mirror actuator which is controlled for constant scan speed. The coil control...
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    A state owned utility would be immune from...

    A state owned utility would be immune from liability should the power lines cause a fire. There would be no incentive to upgrade the power lines. The California legal system is governed by politics...
  20. The stabilizer is an inductor that is used to...

    The stabilizer is an inductor that is used to control how fast the welding current can change. The inductance value is selected to reduce splatter while welding. You have a combination constant...
  21. Your spindle design is described in detail by NSK...

    Your spindle design is described in detail by NSK in the following PDF:


    www.nsk-literature.com/en/machine-tool-spindle-bearings/offline/download.pdf

    Take a close look at page 44. The page is...
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    In the 1970's the trim wheel for a large aircraft...

    In the 1970's the trim wheel for a large aircraft operated a redundant cable system that went to a hydraulics closet that contained hydraulic servos for the wing and stabilizer control surface...
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    I am bringing this thread back to life to correct...

    I am bringing this thread back to life to correct a problem.

    This is one of those threads where there are two pages of responses to a simple question but none of the responses answer the question....
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    Some background information: By the late...

    Some background information:

    By the late 1980's the average career length in engineering was approaching 10 years. The Federal government sends out a survey every 10 years to find out what the...
  25. Workers are most likely to become injured doing...

    Workers are most likely to become injured doing mindless repetitive tasks. Automation, in most instances, improves worker safety.

    In those instances were repetitive work is required elaborate...
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