Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: Robert R

Page 1 of 10 1 2 3 4

Search: Search took 0.00 seconds.

  1. Replies
    39
    Views
    1,633

    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...
  2. 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...
  3. My obsolete 1970's Landis handbook suggests using...

    My obsolete 1970's Landis handbook suggests using the 60 grit wheels for finishing rather than heavy stock removal on low hardness steel shafts. The 60 grit wheel in a less durable aluminum...
  4. The Landis grinder may have a low speed (new...

    The Landis grinder may have a low speed (new wheel) and a high speed (worn wheel) setup on the pulleys. If the wheel speed is too fast the wheel will act harder and burn the work. Make sure that the...
  5. If you plan on using the camera for quality...

    If you plan on using the camera for quality control as well you will need to equip the camera with a telecentric lens. These lenses have very low image distortion It prevents the circular holes...
  6. Studer manufactures cylindrical grinders with a...

    Studer manufactures cylindrical grinders with a plastic way layer that is capable of holding dimension errors to less than .00004" over a 25 inch part length. (That .00004" is not a typing error.)...
  7. Years ago I worked at a company that used the ...

    Years ago I worked at a company that used the plastic lined metal shell bearings running on 2 inch diameter Thompson case hardened centerless ground bar in a vacuum chamber. It was a elevator that...
  8. That's it. In the semiconductor business the...

    That's it. In the semiconductor business the cassette is a injection molded part .
  9. The idea is not original. It has been used in the...

    The idea is not original. It has been used in the semiconductor industry for the past 50 years to handle wafers.The cassette design has evolved over the years as the wafers went from 3 inch diameter...
  10. One way to simplify the rotary transfer machine...

    One way to simplify the rotary transfer machine design is to skip the turntable and motor assembly and instead use a off the shelf product. The NSK Megatorque servo motors are hollow shaft vertical...
  11. My understanding is that the S40 grinder is made...

    My understanding is that the S40 grinder is made with a polymer granite base supported on three feet. With the three support feet the frame cannot be twisted even if the machine is not level.
    So...
  12. A indexing mechanism that does not meet the...

    A indexing mechanism that does not meet the accuracy requirements can be assisted by using a shot pin engaging in index holes in the part turntable. The indexing mechanism would need to have a...
  13. If your tailstock center line was higher that the...

    If your tailstock center line was higher that the wheel head center line and the workhead lower that the wheel head center line you would have a hour glass shaped part.
  14. A dial type machine, also called a rotary...

    A dial type machine, also called a rotary transfer machine, would do the job.

    This is a turntable about 16 inches in diameter with 6 four inch diameter holes each with indexing pins meshing...
  15. Replies
    8
    Views
    1,145

    The machine you are looking for is a impact...

    The machine you are looking for is a impact shear. This is a machine that uses two die blocks to shear the rod. The shear will produce square cuts at several hundred parts/minute for small bar...
  16. Replies
    11
    Views
    1,190

    The pin sheared off the welded end cap when the...

    The pin sheared off the welded end cap when the worn bearing forced the pin to rotate, If the pin had been fixed into position with a press fit in the collar so that it could not rotate, the pin...
  17. Place in a preheated oven at 375 deg F and bake...

    Place in a preheated oven at 375 deg F and bake until golden brown.
  18. Replies
    13
    Views
    5,516

    Tungsten has a brittle to ductile transition...

    Tungsten has a brittle to ductile transition temperature of 200 deg C. and higher. The temperature is determined by the manufacturing process and the annealing temperature. The blank may be forged,...
  19. You might also look at the CBN wheels for ID...

    You might also look at the CBN wheels for ID grinding from Diagrind. They may have the geometry that you need for the Fischer arbor in stock.

    The CBN wheels may be less expensive than...
  20. Replies
    3
    Views
    967

    Have you looked at Tony's web site? Page Title...

    Have you looked at Tony's web site?

    Page Title

    If you use Duckduckgo to search for online images, it is possible to make a informed guess as to what the the differences were between the lathe...
  21. Replies
    13
    Views
    1,839

    The wheelhead paint is not damaged by hydraulic...

    The wheelhead paint is not damaged by hydraulic fluid. It will lift off from the cast iron when exposed to water. The filter above the wheelhead serves two purposes. It collects grit and it stores...
  22. Replies
    13
    Views
    1,839

    Sunnen OD honing stones and holders

    This is the link to the Sunnen OD honing web page if anyone else is interested in restoring a grinding spindle

    https://www.sunnen.com/graphics/assets/documents/5f74c694ddff.pdf

    The stones with...
  23. Replies
    28
    Views
    3,256

    Is this the machine that you have? SIP...

    Is this the machine that you have?

    SIP Hydroptic 8 Jig Borer

    38,000 pound machine, 4 HP vertical and horizontal spindles, horizontal spindle with tailstock, SIP 50 taper
  24. Replies
    13
    Views
    1,839

    Tony's Old Lathe website says that J&S sold...

    Tony's Old Lathe website says that J&S sold cylindrical grinders furnished with both hydrodynamic journal bearings and with ball bearings as a option. The ball bearing wheel heads were less expensive...
  25. Replies
    13
    Views
    1,839

    The easiest approach is to resurface the hardened...

    The easiest approach is to resurface the hardened steel spindle and then use the spindle as the reference for fitting the bronze bearing. The spindle can be resurfaced by making two end caps to...
Results 1 to 25 of 247
Page 1 of 10 1 2 3 4