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Type: Posts; User: Robert R

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  1. The 29A abrasive used in that wheel was a...

    The 29A abrasive used in that wheel was a Cincinnati Milacron product. The abrasives business was sold to the Tyrolit company in 2004. Tyrolit also purchased the Radiac abrasives company in 2009.
    ...
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    Have you considered potting the bearing shells...

    Have you considered potting the bearing shells into a thick walled steel cylinder using one of the low temperature (160deg F) metal alloys ? The metal alloy can be selected to expand slightly when...
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    A one inch diameter diamond ID grinding wheel...

    A one inch diameter diamond ID grinding wheel costs roughly 50 dollars. The cost of a 120 grit roughing and 300 grit finishing wheel would be less than 100 dollars.

    ID honing would require the...
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    Your part requires electric discharge machining...

    Your part requires electric discharge machining to remove the core of the cylinder and to rough bore the side hole pattern. The OD and ID are finished ground to remove the EDM surface damage and...
  5. Your picture shows a bolt through a rubber...

    Your picture shows a bolt through a rubber grommet type coupling. It is used on older tractors to connect the crankshaft to the hydraulic pump. The rubber grommet will allow for some axial...
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    The " I need a operator's manual for a tool and...

    The " I need a operator's manual for a tool and cutter grinder" is one of the most frequent requests on this forum.

    I f you do a search for " tool cutter grinder manual " using the search function...
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    Ladder logic is the preferred choice when the PLC...

    Ladder logic is the preferred choice when the PLC programmer has no knowledge or experience in using a higher level language or understanding of structured programming. Ladder logic is suitable for...
  8. I replaced the front tires last year with 14 ply...

    I replaced the front tires last year with 14 ply Samson radial trailer tires. (ST225/90R16) They have been a very good choice for front loader operation. Samson is a French tire company that moved...
  9. The backhoe is used on rough ground in the...

    The backhoe is used on rough ground in the foothills. When I operate it there is very little tread wear. When I lend the backhoe to the neighbors it sometimes comes back with tread damage from...
  10. Recommendation for selecting a R4 16.9 X 24 backhoe tire brand

    Hello: The 30 year old R4 tires on the backhoe need to be replaced. The tread is starting to peel off the casing and the side walls have 3 inch long cracks. The existing tires have a 8 ply rating...
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    This is a bit off topic but for those who are ...

    This is a bit off topic but for those who are interested in aluminum turning this may be worth exploring:

    Kyocera announced in December that they will be offering DLC coated turning inserts....
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    I was thinking in terms of CarbideBob's carbide...

    I was thinking in terms of CarbideBob's carbide blank coated with Balzer's low cost DLC coating for machining the aluminum alloys rather than using a PCD blank brazed to a carbide substrate.
    ...
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    I am certain that he did not mean that. The...

    I am certain that he did not mean that.

    The difficulty is that only the large suppliers and coaters can afford to do the extensive turning tests needed to optimize a insert design.

    Relying...
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    A few comments: My understanding is that the...

    A few comments:

    My understanding is that the selection of carbide grade is a science rather than a art. There has been extensive work over the last 50 years determining what works best in a...
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    Go to the pump manufacture's website and download...

    Go to the pump manufacture's website and download the pump performance curve. You will find that the pump has a narrow operating range were it can run efficiently. There are pumps available that are...
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    There is a oil film between the rolling balls and...

    There is a oil film between the rolling balls and the race when the minimum oil viscosity is used. The film does not break down if a higher viscosity oil is used The process is self adjusting. The...
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    The GMN oil viscosity selection is consistent...

    The GMN oil viscosity selection is consistent with the SKF recommendation. The argument is that there is no risk in using a oil with a viscosity higher than the minimum necessary for hydrodynamic...
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    The Heald 25,000 rpm internal grinding spindle...

    The Heald 25,000 rpm internal grinding spindle specifies Mobile DTE light for the mist lubrication requirement. The specification label is riveted to the spindle housing. Each manufacturer has a...
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    A good reference for this is...

    A good reference for this is :https://www.bardenbearings.com/remotemedien/media/_shared_media/08_media_library/01_publications/barden/catalogue_2/downloads_25/barden_speciality_products_us_en.pdf
    ...
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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...
  21. 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...
  24. 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...
  25. 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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