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  • Users: GTFiji
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  1. GTFiji

    Diameter Callout

    This question almost seems too simple to post, but here it goes. I have a diameter callout on a drawing that is preceeded by the diametrical symbol. The dimension with tolerance is 80.0 +/-0.15 mms. Is it acceptable to measure this dimension via CMM by taking a large number of hits around the...
  2. GTFiji

    Steel Price Comparison

    Could anyone please advise on the approximate price/lb for 1" x 1" square bar stock in the following materials? SS 17-4 ph SS 416 Steel 4340 Assume a minimum of 5,000 ft of 1" x 1" bar cut to 5" sections.
  3. GTFiji

    4140 vs 4340

    I am looking at these two materials (4140 vs 4340) for my application, as suggested by users of this forum. I have a 62" octagonal bar (1" flat to flat) heat treated to a minimum of 150k UTS. I need to machine a square bar to my shape and then heat treat. I need the bar to hold tolerences and...
  4. GTFiji

    AL 6061-T6 Alternatives

    I have an application where I currently use AL 6061-T6, machine and then apply a Type II anodize. My parts are getting dented and nicked up. Appearance is then compromised. I want to find a suitable material alternative (Aluminum) that will increase the surface hardness (reduce blemishes)...
  5. GTFiji

    SAE 4041 Heat Treatment

    What Heat Treatment process(s) would best be used to treat SAE 4041 to an Ultimate tensile strength of around 150,000 psi?
  6. GTFiji

    Bearing wear on Stainless Steel Bar

    I have an application where I am running a radial SS bearing (0.2" wide, 0.625" O.D.) over a SS bar flat in a linear motion. The bearing travels back and forth over a 2 ft. section. The bearing is loaded down onto the bar as it rolls with up to a maximum of 50 lbs of force. The bearing O.D...
  7. GTFiji

    Material Selection Challenge

    My product application is in the fitness industry. We have working prototypes but need to define our material selection for production quantities. The product requires an octagon shape bar that is 1.0" flat to flat. (4) of the (8) sides have a 0.9" deep by 0.35" wide channel machined into...
  8. GTFiji

    SS Bar Bending

    I have an application where I am specifying a SS for a 1" bar ~5' long that will be subject to a bending load (i.e. supported on the ends and loaded in the middle). I am looking at 303 (drawn to 100,000psi), 416 H900 temper & 17-4 H900 temper. These materials are being evaluated based on...

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