Item 0494
DESIGN:
SynchroLite ~ Power Train - Reduction Primary - Gripnotch
Drawing:
3VX Gripnotch w/ 4 Grooves by Morse
Input
Max. HP is 25
Max. RPM is 6000.
Max. belt speed is 6000 * pi * 2.35 = 3693 fpm.
Design selection using 3VX Gripnotch belt Drive
(Calculations from Morse catalog. p. G5)
1/ 3VX
2/ Service factor of 1.1
Design HP = 25 * 1.1 = 27.5
3/ d = 2.35" diameter Closest Morse sheave is 2.30"
D = 6.50" diameter Do not go any bigger
2.35 /6.50 = 2.766:1
(Both sheaves are from Optibelt book)
4/ 6000 rpm
5/ 4 * 4.29 = 17.6 hp. Require 27.5 hp. This is OK. 2.30 is 4.04Hp
6/ 27.5 / 4.29 = 6.41 sheaves
7/ C = Center to Center = 11.5 This can/will be changed.
L = 2C + 1.57 * (D + d) + ((D – d)sq / 4C)
= 23 + 1.57 * (8.85) + ((4.15)sq / 46)
= 23 + 13.8945 + (17.2225 / 46)
= 36.8945 + .3744
= 37.2689"
Make belt 37.5" inches. Optibelt 3VX 375
See p. 15 & 21
8/ A/ 4.29 hp + .85 hp = 5.14 hp
B/ 5.14 hp * .89 = 4.5746 hp.
C/ Loss in Arc of Contact = (D - d) * 57 / C
= 23.65
Correction Factor = .94
4.5746 * .94 = 4.3 hp.
4.3 hp * 4 grooves = 17.2 hp. S.F. of 0.6254.
Output
Reduction 2.766:1
Max. RPM is 2169
Sheaves width is 1.9062"
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Last Revised: July 16, 2001