Ran across an issue recently where we are losing much more material than anticipated during the etch process prior to Ti Anodize. It is a cylindrical shaft that is approx. 1.5 inches in diameter and the supplier identifies that will lose as much as .0001" per side during etch. This sounds...
We discovered a temperature limit issue with an aluminum design and now need to look at alternatives. We can get 1.5-2mm wall with the casing wall design in AL but not experienced in SSt.
By IC Handbook are you referring to the Investment Casting Institute? Is there another prime reference that...
Sorry about the delay in response...
Appears that a vast majority of the debris was from the gear elements. The material breakdown indicated primarily 9310/4340 material content. The gears in use were actually 8620 so I assumed that the program misidentified the material as 9310, 8620 was not...
Terry,
You make a great point about the media "suspended" in the lube being non-metallic. Kind of an "ah ha!" moment. We have a standard Chicago Rawhide oil lip seal on the forward end, viton with the garter spring for contraction on shaft. We have observed grooving in the shaft that could...
Ron,
Gearbox currently utilizes a synthetic lube per Mil-L-7808. The time to color change is disturbingly short, only 3-5 minutes of operation. Good question on the platings as all of the major components are unplated but I need to verify the small stuff; i.e. spacers, lock-rings, etc... Will...
I get my SEM results back on Monday, 10/3. Will post those results when avaiable. That will shed some light on the situation.
I was trying to be pre-emptive on whether anyone had experienced this type of black staining in the lube due to carburize.
Thx. BCK
Ron,
That is what I am considering. Do that make sense?
Regarding analysis.
1) Particulate analysis pick up an even mix of non-magnetic and magnetic media.
2) Magnetic media was very fine matter. Partial consituent was 9310 but a large amount was unidentified. SEM in process to define the...
A product we produce in specific configurations utilizes a splash lube planetary gearbox for speed reduction. The sun (nitralloy) and fixed ring gear (8620) are nitrided and the planets (9310) are carburized. In order to facilitate identification of lube refill we have recently added...
We have struggled with proper inspection methods for NPT threads created using NC lathe. We run into conditions where the L1 gage works as required but have struggled to determine a way to verify the L3 depth. There is no appropriate NPT gage and it is the feeling of some that it is proper to...
We have struggled with proper inspection methods for NPT threads created using NC lathe. We run into conditions where the L1 gage works as required but have struggled to determine a way to verify the L3 depth. There is no appropriate NPT gage and it is the feeling of some that it is proper to...
We admittely are overspeeding a bearing with a riveted steel cage due to some new customer applications. We are trying to see what alternative could be investigated to improve the speedability. The easiest is to play around with the cage, of which we have limimted options, and make a small...
Will I see much, if any, speed rating advantage with the snap-in nylon cage / spherical seat versus a riveted, formed steel cage. Grease packed running in the mid 20k rpm. 12-14 mm ID. ABEC 1.
Also any ideas on gauging an advantage for same issue with speed by moving to an ABEC 3?
Thoughts or...
