Din 5480 Male Spline Dimensions? 3

[ukjay1]

I'm looking for male spline dimensions to make a shaft to fit a din 5480 female spline N200x5x30x38x9H. Does anybody know where I can get the male dimensions or have them handy to fax a dimensional sheet of the spline.

Thanks

 

[Carburize]

Take a look at thread 404-98789 it may have the answer you need.

 

[gearguru]

ukjay1
if you can wait until Jan. 3, I can find it for you.
I need to know what fit class you want;
because the internal spline is 9H, the external can be something like 8h or 8g or 8f (H/h has smallest backlash, H/g more, H/f even more...)
Our German friends will ask for something like W200x5x30x38x8f per DIN5480
(N-Nabe-Hub, W-Welle-Shaft, OD=200mm , module=5mm, press. angle=30Deg, 38 teeth, 8f tolerance)
You can buy the English version of this standard. It icludes charts with all dimensions you need. I highly recommend it if you work with metric splines.

 

[diamondjim]

This mimics an earlier posting by gearguru:

The spline specification looks like this:


N200x5x30x38x9H/8f DIN5480

where 200 is a"reference dia"
5 is module
30 is pressure angle
38 is no. of teeth
9H is tolerance on the hub (internal) spline
8f is tolerance on the shaft (external) spline.
This spline is "side fit"; the OD or ID centered splines are described with more data.
The root shape (flat or full radius) can be also specified.

If only one spline is defined, the letter N or W are used before the reference diameter.
N means "Nabe" (Hub, internal) W means Welle (Shaft, external)
The "reference dia" is a theoretical diameter, slightly larger than major diameter on the shaft spline. The reason for this spline description is to give the designer the information, what size of part (most of the time bearing's bore) can be moved with some clearance ABOVE the spline.
In the example above, a bearing with nominal bore size 120mm will slide above the spline to its journal dia located behind the spline.

I would wait for gearguru and let him find the info
for you. He must have the specs at work.

 

[gearguru]

>>The "reference dia" is a theoretical diameter, slightly larger than major diameter on the shaft spline.<<
Absolutely correct, diamondjim. Thanks for improving my post. Yes, I have the specs at work.
I picked the "f8" external spline as a logical meshing spline.
Happy New Year to everybody who reads this post!

 

[gearguru]

EXTERNAL INVOLUTE SPLINE N200x5x30x38x8f (SIDE FIT)
NUMBER OF TEETH 38
MODULE 5.0
PRESSURE ANGLE 30
MAJOR DIAMETER 199.00-198.86
PITCH DIAMETER 190.0
T.I.F DIAMETER (MAX) 184.26
MINOR DIAMETER 187.08-188.00 for fillet root
[189.00-187.38 for flat root]
BASE DIAMETER 164.545
MEASUREMENT OVER TWO 10.0mm ROLLS 210.056-210.102

Most data are from the DIN5480, some are calculated using the formulae in it.
The size over rolls applies for the 8f fit only.

(Note - if both ext. and int. splines are "prescribed" per DIN 5480, no "N" or "H" is used; therefore the diamondjim's example should look like this:
DIN5480 - 200x5x30x38x9H 8f )
I hope I helped a bit; and I still recommend to purchase that standard. This document explains and teaches the user a lot.

 

[ukjay1]

gearguru,

Do you know where i can purchase this standard? Thanks for the post.

Ukajy1

 

[gearguru]

You can buy the hard copy, or *.pdf (electronic copy - download) from

http://global.ihs.com/

Not cheap, but good...

 

[notrub]

I am looking for over pin dims for following splines:-
N16X1.25X30X8H-11TOOTH,1.25 MOD DIN5480-female
W16X1.25X30X11X8f-11 TOOTH,1.2 MOD- MALE
I have the spec but not part 14
Notrub

 

[SPEAR34]

ukjay1

Did you manage to get a drawing of this profile ?
I'm in the same boat for exactly the same spline detail but don't have the time to obtain and digest the spec.

Basically I'm repeating your origional thread to yourself in the hope you have the answer :-D

 

[ukjay1]

SPEAR34,

Here is the data i was able to get, and used successfully on a recent project. I got this data from the hydraulic motor mfg. that my shaft had to mate to.

Male Spline Metric Dimensions (MM)
TOOTH DATA W200
Tooth Profile and bottom form DIN 5480
Tolerance 8f
Guide BACK
Pressure Angle 30'
Module 5
Number of Teeth 38
Pitch Diameter 190
Minor Diameter 188 0/-1.201
Major Diameter 199 0/-0.290
Measure over measuring pins 210.158 -0.088/-0.157
Diameter of measuring pins 10
Addendum modification x*m 2.25

hope this helps

 

[notrub]

gearguru (Automotive)
Ref DIN5480 11T,1.25mod, internal spline . if we open bore
of spline from 13.5 dia to 14.0 dia will this effect the
engagement/running with the mating male spline the fit is 8H/8f.

 

[unclesyd]

Take a look at this site. If you print it out it is much clearer.

http://www.omnigearandmachine.com/DIN5480-involute_splines.htm

A very nice site for fits and if you want to checkout the shaft that the spline is on.

http://www.tecnologix.net/en/tools/passungsrechner/passungsrechner_v05.html

 

[gearguru]

notrub,
I believe we are talking about the "side fit spline".
The 8H/8f fit applies to the teeth fit; it means that you have guaranteed clearance (backlash) between the flanks of the internal and external spline teeth.
Increasing the major diameter (I believe that is what you call "bore", that's what I found in the DIN standard) has no impact on the backlash. CIt only changes the clearanc "above" the teeth and makes the internal spline more "pointed", what can be problem if it carries large torque.
The backlash (controlled by the 8H/8f fit) will remain unchanged.

 

[gearguru]

notrub,
please disregard my previous posting.
You obviously want to increase the MINOR (smallest ) diameter on the internal spline. It does not have any impact on the fit (my previous posting is valid here), but you are also making the contact area between the teeth smaller, therefore you increase the contact stress on the tooth flanks.
Sorry for my mistake above!

 

[notrub]

gearguru
Thanks for reply dated 23.06.05. In the past I have worked
out strength of gears using the lewis formula, If I apply
this to the 11t din spline and multiply the figure by 11(teeth)
I have 6.66 factor of safety is this a fair way of doing this
Regards
Notrub

 

[gearguru]

notrub,
the splines are usually calculated for contact stress between the teeth. Both the internal and external teeth have theoretically the same shape/curvature. We usually calculate with only 50% teeth in contact, what is conservative.
You can also check the teeth for shear stress (in the middle of the contact area).
There is a relatively new DIN standard for doing these calculations; it is complex and I did not see any splines checked by it yet - but it does not mean that some people are doing it.