Tedata
se
Program : MDESIGN User : Customer :
Version : 1.1.2 Date : 15.05.2019 Proj. Nr :
U
Helical Gearing
Input data:
al
Helical Gearing
Normal pressure angle 20°
rci
Helix angle = 25 °
Normal diametral pitch Pdn = 9 teeth/in
Face width F = 1.651920336 in
Transmitted power P = 10 hp
Rotational speed of pinion np = 2900 rpm
Number of pinion teeth Np = 19
me
Desired output speed ng = 1160 rpm
Design life L = 20000 h
Number of load applications per q = 1
revolution
Rim thickness of pinion tr = 1 1 in
and gear
m
Bending geometry factor of J = 0.44 0.98
pinion and gear
Pitting geometry factor I = 0.193
Gear application Commercial enclosed gear
Co
units
Elastic coefficient Cp = 2300
Overload factor Ko = 1.5
Factor of safety SF = 1
Hardness ratio factor Ch = 1
Reliability factor Kr = 1
for
Results
Diametral pitch Pd = 8.157 teeth/in
Transverse pressure angle t = 21.880 °
Actual output speed ng = 1172.340 rpm
Actual number of gear teeth Ng = 47
Gear ratio mg = 2.474
Qualty number Qv = 9.000
t
Geometry parameters
No
Pinion Gear
05/15/2019 00:18:33 Page 1/3
Tedata
se
Program : MDESIGN User : Customer :
Version : 1.1.2 Date : 15.05.2019 Proj. Nr :
U
Helical Gearing
Pitch diameter D = 2.329 5.762 in
Outside diameter Do = 2.575 6.007 in
al
Root diameters Dr = 2.023 5.456 in
Base circle diameter Db = 2.162 5.347 in
Addendum a = 0.123 in
Dedendum b = 0.153 in
rci
Clearance c = 0.028 in
Circular pitch p = 0.385 in
Normal circular pitch Pn = 0.349 in
Axial pitch Px = 0.826 in
Whole depth ht = 0.276 in
Working depth hk = 0.245 in
Tooth thickness
Center distance
Fillet radius in basic rack
Force and speed factors
Pitch line speed
m me t
C
rf
vt
=
=
=
=
0.175
4.046
0.037
in
in
in
1768.488 ft/min
Tangential force Wt = 186.525 lbf
Normal force Wn = 219.016 lbf
Radial force Wr = 74.908 lbf
Axial force Wx = 86.978 lbf
Co
Size factor Ks = 1.000
Load distribution factor Km = 1.207
Dynamic factor Kv = 1.255
Face width/Axial pitch F/Px = 2.000
Pinion Gear
Rim thickness factor Kb = 1.000 1.000
Number of load cycle Nc = 3.5e+009 1.4e+009
for
Bending stress cycle factor Yn = 0.917 0.932
Pitting stress cycle factor Zn = 0.874 0.892
Expected bending stress St = 4755.019 2134.906 psi
Expected contact stress Sc = 54938.253 54938.253 psi
Allowable bending stress number Sat = 5185.573 2290.983 psi
Allowable contact stress number Sac = 62852.525 61556.769 psi
t
Note
After computing the values for allowable bending stress number and for
No
allowable
05/15/2019 00:18:33 Page 2/3
Tedata
se
Program : MDESIGN User : Customer :
Version : 1.1.2 Date : 15.05.2019 Proj. Nr :
U
Helical Gearing
contact stress number, you should go to the data in AGMA Standard 2001-C95,
to
al
select a suitable material. Consider first whether the material should be
steel,
cast iron, bronze, or plastic. Then consult the related tables of data.
For instance use through-hardened steel with hardness, HB
rci
Pinion Gear
Grade 1 180.000 180.000
Grade 2 180.000 180.000
m me
Co
t for
No
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