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  • Users: DennisP
  • Content: Threads
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  1. DennisP

    Growth of Material in Heat Treat

    Does the reduction ratio of the raw material have any bearing on the rate of growth of a part in heat treat? For example, given a single heat of steel, one bar drawn to a diameter of 1" and one bar drawn to a diameter of 1/2". The 1" bar is turned to produce a part of .45" diameter as is the...
  2. DennisP

    Perpendicularity callout

    I have a print that has a perpendicularity callout on an end face of a cylindrical part of .25% to DATUM X, which is the OD of the part. I'm familiar with perpendicularity, but have never seen it called out as a percentage. My question is , a percentage of what?
  3. DennisP

    Solenoid Core Magnetism

    I have a situation with a customer. We make solenoid cores for them out of SD 200G, which is a 12L14 equivalent, with an electroless nickel plating. Cores made from one heat of material seem to perform fine. Cores from a different heat of material do not seem to have the same magnetic properties...
  4. DennisP

    Spherical Grinding/Turning

    I am looking for information on companies that manufacture the equipment, either grinding or turning, to produce spherical radii such as that found on rod ends, etc. I have an application for a machine that can produce a spherical radius of 20mm on the end of a cylinder with a surface finish of...
  5. DennisP

    Spherical grinding machines

    I am looking for information on companies that manufacture the equipment, either grinding or turning, to produce spherical radii such as that found on rod ends, etc. I have an application for a machine that can produce a spherical radius of 20mm on the end of a cylinder with a surface finish of...
  6. DennisP

    Material Substitution

    I've received a quote from a Chinese supplier that specifies GB 10 material as a substitue for AISI 1010. I can find no reference to GB 10 in any of the literature I have available to me, nor can I find anything on the internet. Does anyone have any info on GB 10 material that they can share? Is...
  7. DennisP

    Silicone sealing of electrical connectors

    I've heard of a process used in hermetically sealed electrical connector manufacture where the connector is dipped in silicones and baked to remove the volatile components, leaving behind an SiOx film that seals microcracks in the glass insulators. This allegedly results in a higher insulation...
  8. DennisP

    Headers on a 350

    I am considering a Bassani exhaust for my full size 94 GMC with a 350. Does anyone have any experience with this system? I'm replacing everything from the heads back including headers and cat and using the exhaust that exits in front of the back tire. I'm looking for increased torque as I plan...
  9. DennisP

    Thread specifications

    I need to know the dimensions for a 9/16 - 18 SAE Port Thread. Where can I find this info or, does anyone have the dimensions, such as Major, Minor and Pitch diameters, any lead taper, etc? Thanks in advance for the help!
  10. DennisP

    Electrically nonconductive EPDM

    I am searching for a source of electrically nonconductive EPDM for use as a gasket in an electrical connector. We would take the uncured sheet material and mold it into the gasket shape. Can anyone help?
  11. DennisP

    Surface roughness

    Can anyone tell me what a 12.5s surface roughness is?

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