What's new
What's new
By:
Advanced search…

Search results

  1. M

    Which hardness to choose for fixture components

    Hello ! I'm making a fixture for milling aluminium cast parts and have a need for couple guiding / alingment details. I make these from ARNE tool steel and want to harden these for better wear resistance (cast parts sliding on-off from fixture, about 5k to 10k parts minimum. I want to make...
  2. M

    Pre-machining stress relieve AISI304

    Hello ! I got some 20x40mm AISI304 cold rolled bar stock which I need to machine from all sides (about 300mm length) I fear that these will bend and play when I start removing material from sides. Should these bars be stress relieved before machining? At 400 or 450 deg in oven ? Please...
  3. M

    Thermoforming POM sheet

    Hello ! I got a project where I need CNC milled POM boxes, 150x100x40 mm, wall thickness about 3mm..10mm (screw posts) For protos, we used blank POM sheet, but for medium-run the material cost is quite noticeable Share experience - how difficult is to thermoform POM blanks for the boxes ...
  4. M

    Tapered bearing as zero point

    Hello all ! I have a simple fixture to make and I had an idea Why not use tapered bearings instead of reamed hole / pin ? Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system. I was thinking about putting 4 bearings in the jig corners and...
  5. M

    Quality and junk aluminium profile. How to test ?

    Hello all ! Just had a problem with aluminium profiles. Same drill, same program Different supplier of aluminium (6063) 2.8mm holes + formed threads quality aluminium: all holes and threads OK (checked visually and with M3 go/nogo thread gauge) junk aluminium: 50% holes had damaged...
  6. M

    Hard soldering handle to hub

    Hello ! Quite simple application, need to hard solder handle to hub (8mm shaft, 8mm hole). About 200pc Think about gear handle on lathe. Hole and shaft are specified as h7/H7 tolerance. But i think customer has copy-paste error there.. I think the gap is too tight to hard solder, what do you...
  7. M

    Tornos Bechler ENC-164 toolholder supply

    Hello all ! Can you advice who supplies toolholders for that machine ? I attached the picture of toolpost. Maybe its ssome standard holder, dont have experience with swiss-lathes.
  8. M

    Robodrill T14 tool drop from carousel

    Sometimes - very rarely - Robo T14 (we got 3 machines, both a and b) drops tool from toolholder. Of course, usually the holder with most expensive tool or dial indicator (according to Murphys law). We suspect that maybe the chips are messing something up. But it happens very rarely (1-2 times...
  9. M

    Tornos-Bechler ENC-164, experience

    Hello ! Good luck and destiny brought one machine in my barn. Along with 4 meter bar feeder. Should be in working condition Has anyone experience with that machine ? I got 2 main questions 1) non-round stock - is that machine capable of handling it (hex, square) 2) How about tooling ? Insert...
  10. M

    please remove

    sorry for double post, please delete this one
  11. M

    Robodrill T14iB Z axis screw problem

    Hello ! Our robo has Z axis screw like on attached picture. It actually has 2 nuts bolted together, I dont know if its for improved rigidity (iB has faster rapids compared to iA) Problem - it makes rumbling noise and lately has started nonsmooth movement on Z axis (jumps about 0.1mm, checked...
  12. M

    Brilliant comment from youtube, for all the scraping folk :)

    You should always use a granite surface plate desk, even in the kitchen! I sleep on a granite surface plate to make sure I get the most precise dreams ever, to within 3 microns Just could not resist to post that :)
  13. M

    Simple Nikken tool presetter questions

    Hello ! We have one simple used tool presetter And I got some questions, perhaps some can help :) 1) I did not find manual from web, anyone have it ? 2) Attached taper is stationary and not revolving. Can I measure tool runout by simply turning the tool in taper ? 3) Which would be the...
  14. M

    Molten salt paint and coating removal

    Hello ! I'm looking a method to remove thick epoxy coating from small parts. Sandblasting is doable but very hard. I read about molten salt baths but have no experience and found no composition recipes from internet. Anyone have experience or recommendations ? I want to make only small scale...
  15. M

    Long HSS-Co mills for steel finishing

    Hello ! As I dont want to be "leach", I share some positive experience. We made press form from medium-carbon steel and used 1) coated carbide for rough working 2) long HSS endmill for finishing End mills long, 1 tooth cut over centre, 30deg, type N, Weldon shank | ZPS-FN a.s. 25mm, 5 tooth...
  16. M

    Best steel material for 300 deg C

    Hello ! We have to make some small washers which will work under spring load and the temperature will be cycled between room temp and 300 deg Celsius. Brass washers did not work, spring end "ate" the washer So perhaps stainless works better. AISI304 or AISI316 or AISI316Ti ? I know that...
  17. M

    How to press-form this part

    Hello ! Please share experience how to press similar parts from steel blanks U Clamp Steel Saddle U Clamps, Thickness: 2 To 5 Mm, Size Range: 1/2"-2", Rs 30 /piece | ID: 20989385948 On the picture, the part is made from thin steel but I have to use 3mm stainless. Can I make one form or...
  18. M

    Welded frame reference surface milling

    Hello ! Imagine a welded frame and a need to mill reference surface (feet) As the piece is not super-rigid, would it be better to use Shell end mills, fine teeth, type H | ZPS-FN a.s. Instead of usual 8-teeth carbide insert facemill. I imagine that HSS piece has much lower cutting force...
  19. M

    Hot roll laminator - roll refurbishing

    Hello ! We use hot-roll laminators here and during use the hot roll gets scratched Similar rollers: New, Used and Refurbished Lamination Rollers– VitechParts I dont know exact material, its medium-hard rubber-like with surface working temp about 120deg Celsius How can the surface be...
  20. M

    How to set Z-zero on surface grinder ?

    Hello ! Please share tricks of trade. I do the following: 1) Use diamond to make grinding wheel surface flat and clean 2) Set the zero using i.e. 10mm gage blcok between wheel and "zero" surface, by moving gage block left and right until the non-rotating wheel starts touching the block. 3) it...

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2024 Copyright Practicalmachinist.com. All Rights reserved.

Back
Top