We designed an o-ring face groove for a .103 (inch) cross section diameter o-ring. The design groove width was in the range of .139 inch. But now I see that tooling is almost non-existent to machine this size groove (remember face seal.) Does no-one use this size o-ring for face seals? I see...
thanks, guys, I had already purchased 5480-1 and 5480-15 (not finding the data), now I will be placing my order for 5480-2.
As lbmakem notes, I am working with an internal spline.
Looks like standards are a cash cow for the DIN folks. All of this data is in B92.1 which is only 65USD.
I am utilizing a DIN 5480N40x2x30x18x9H spline. Where do I find the spline data for the:
Base Diameter,
Major Diameter,
Form Diameter,
Minor Diameter ,
and the:
Circular Space Width
Max Actual,
Min Actual,
Max Effective,
Min Effective.
I looked for...
No, electricpete, there is no load per se on the electric motor. The inertia of the hydraulic pump (minimal), and pumping of small amounts of hydraulic fluid (20 gpm) under very low pressure (300 psig) are all the loads that would be present. A 150 hp motor probably wouldn't even know there...
I think I need to clarify.
I want to use the electric motor to drive a hydrostatic transmission. This transmission would be a variable speed drive to my load. It has two states: "ON" which would accelerate my rotating load to speed and hold the speed for a few minutes; and "OFF" which would...
I have an application where I want to start a large inertial load, run it for a few minutes then stop it using the electric motor.
The startup cycle is a constant torque cycle going from 0 to 220 hp in six seconds. The torque goes from 0 to 9202 in-lbf in the same six seconds.
The load then...
You should also look at CoCreate. They are not cheap, but they have good modelling accuracy and export models to FEA and have their own FEA addin.
Budget 10-20 K$ for software plus another 2K per user for training. You can get away with a pretty cheap computer now, not like a few years ago...
Back - way before - we had cnc stuff, spline and gear tooling was made by using 3 or 4 arc to approximate the spline. Even in the early 90s I was getting tooling for gears and splines that were created that way.
Finding the radii of the arcs is no hill for a climber.
iaguy
Greg, I have worked with an I3 before and it was very well balanced. I have not done engine balancing since the late sixties, but I remember that 3s and 6s were very easy to balance. Do I not correctly remember?
You get your duty cycles by measuring your product in the field. You instrument the product, or inspect the wear on used product / prototypes. You could guess that other products have the same duty cycle as your product - but if you don't compare the product results how do you know???
L
I guess things have changed. We covered engine balancing in our second year of school. I remember being told that a three cylinder engine was inherently balanced and a four cylinder was darn tough to balance. Detroit Diesel made a three cylinder 3-53 series that we used for years and it was...
Part of you question asks do you use .250 +/- .001 or .250 +.002/-.000. The answer to that is in your tooling. if you have a cutter for the slot that is .250 then you would use .250 +/-.001. This allows for over size cutting in the slot and wear on the tool. If you cutter is .251 then you...
I design in english units because I have a feel for them. My co-worker from Germany converts my answers to metric, so he can understand them. I convert his answers to english units. We create our drawings in metric units. The machinist on the shop floor recalculates the dimensions on the...
hpux
RE is a regular expression
RERE is a regular expression made from two reg exps
. is any character except newline
RE /{m/} is exactly m repetitions of RE
so
grep -e ^./{20/}20 filename
gets you start of line, 20 characters and a 20 in the line.
good luck, you might have to modify the...
