GEAR2000 Help - Profiles - HTD Pulleys
   
HTD Pulleys

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HTD profiles are used for high power transmission.

Available metric pitch:
            HTD 3M   (3 mm)
            HTD 5M   (5 mm)
            HTD 8M   (8 mm)
            HTD 14M (14 mm)
            HTD 20M (20 mm)

Teeth number must be between 10 to 216.


After you have entered the Main Data (red values) you must CLICK the CALCULATE button.
The Calculated Data are refreshed and you can shows next DIALOG, clicking Continue button.

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The teeth are characterized by a full radius profile with a straight line that determines the pressure angle ( 7°).
Dimensional standardization sets the tooth shape characteristics for each of the five types of pulleys contemplated.
The dimensions and tolerances of the tooth are indicated in the following table.

 

 

Z
Min-Max
 
br
Toll1
hg
Toll2
yD ± 1°
R max
rt
Toll3
2*a
HTD 3M
10-72
1.90
+0.05
0
1.22
+0.05
0
14°
0.91
0.30
+0.00
0
0.760
HTD 5M
12-72
3.25
+0.05
0
2.06
+0.05
0
14°
1.56
0.48
+0.05
0
1.140
HTD 8M
22-192
5.35
+0.07
0
3.451
+0.1
0
14°
2.57
0.8
+0.1
0
1.362
HTD 14M
28-216
9.80
+0.10
0
6.00
+0.13
0
14°
4.65
1.40
+0.1
0
2.674
HTD 20M
34-216
Na
+0.15
0
Na
Na
14°
Na
Na
+0.1
0
4.318

The tolerance for External Diameter calculation are defined from 7721-2 standard table:
d0
dimension
Tolerance
Toll4
<= 25
0   -0,05
-0.025
>25 and <= 50
0   -0,05
-0,025
>50 and <= 100
0   -0,08
-0,04
>100 and <= 175
0   -0.08
-0,04
>175 and <= 300
0   -0,1
-0,05
>300 and <= 500
0   -0,1
-0,05
>500
0   -0,15
-0,075


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External Diameter  D0 = Dp – 2*a + Toll4
Root Diameter        Df = D0 – 2*(hg) – Toll2


From version 5 the software also calculates the profile for locking plates machining tool.


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