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  • Users: kkeenn
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  1. kkeenn

    Tapping fine over coarse threads

    I mistakenly had a hole tapped 4-40 instead of 4-48. Normally this wouldn't be the end of the world. However, ball spring plunger only come in 4-48 in that size. Is there a remedy to this? I've attempted using a helical insert but the material is titanium and it just tore up the tap.
  2. kkeenn

    Multi-Axis turning (turning about two non parallel axis)

    I am looking for a technique, machine, or part (e.g. collet) that would allow me to turn a rod about at least two non parallel axis. Does anyone know of one and could point me to the right direction? What I am trying to get is a single cross section at a different orientation (<10 degrees). It...
  3. kkeenn

    Anyone know a supplier of off-the-shelf 2 start socket cap screws?

    I am looking for 1/2" 2 start lead screw (preferably with a socket cap). Can anyone recommend a supplier?
  4. kkeenn

    Need help finding Stainless Steel Rivets for rotational pin joints

    I am working with .020 " stainless steel sheet. I would like to create a rotational joint by placing a rivet in place and am having problems finding an appropriate rivet. Can anyone suggest a company/ rivet that I might use? I really like the flush mounted SFP SpotFast Fasteners but they don't...
  5. kkeenn

    Laser welding drawings callout

    I am looking for a reference that I can use to callout a laserweld on a drawing. In the past I have used an arrow followed by LBW and numbered note that specifies depth and class of welds. The welding houses I work with hate this because of how they have to verify depth. However, when I ask how...
  6. kkeenn

    Profile tolerance for an array of slots

    I have an array of slots that are defined by basic dimensions (Radius, length) and a profile tolerance. I would like to dimension and tolerance the pattern but am not sure how. If it was a hole pattern I could write 300X .25+-.004 with the attached positional tolerances and basic dimensions...
  7. kkeenn

    looking for suggestions on small quantity polymer film supplier

    I am looking for a small quantity polymer film supplier. I'm looking for several polymers (ABS PEEK PE) in dimensions of .01-.015 (thickness) x 1" x 48-60" can anyone recommend a supplier? McMaster has ABS in 2 weeks and PEEK but not in dimensions that I want. Grainger only has PE. Thanks
  8. kkeenn

    Standard ID and OD of PH17-4 tubing

    I am looking for a catalog of standard ID and OD of 17-4 SS. The OD range should be from 3-20mm. I have the sizes for other stainless alloys but cannot find one for 17-4. Any help would be appreciated. Thanks.
  9. kkeenn

    Laser welding-- surface temp and spot size in Ti64

    I would like to have a strip of Ti64 (cross section .7 x 4 mm) welded to a block 3 mm thick. I would like to run a seam (.2 mm deep) down the 4 mm length (from A to B in the attached image). My question is at what point along the thickness (t) of the part will the temp drop down to below 100C...
  10. kkeenn

    Best manufacturing process reference.

    I am a mechanical engineer in need of a good manufacturing process reference. I have texts from college but they are rather dated. I need something that doesn't look at cnc as something new :) . The equipment/processes I am looking for are laser welding, wire edm, swiss lathes, and live...
  11. kkeenn

    Profile tolerance on a biconvex object

    I have a biconvex object similar to the one that is attached (The actual object has multiple curves per side instead of just 1). I would like to assign a profile tolerance to the front and side view to tolerance it. A colleague of mine says that I can't do it because the profile of the front...
  12. kkeenn

    Flatness of specific regions

    I have a rectangular plate where I need to specify a flatness tolerance on an area located 1.5" from the long ends (out of 40"). In the past when I specified flatness I've always specified from a-b but without a feature to associate a and b with I'm lost. A little illustration where the x...
  13. kkeenn

    Multiple Tangental Constrained Radii

    I'm dealing with a small sheet metal part that has multiple sequentially constrained radii (see attached picture, all radii are constrained). If I constrain the upper and lower surfaces with constrained radii I run into the possibility of the the geometry on the left occurring where one radii...

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