STEELFLEX® - Rexnord
STEELFLEX® - Rexnord
STEELFLEX® - Rexnord
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Type T50<br />
Floating Shaft/Selections<br />
Introduction — Floating shaft diameters have been preselected<br />
to transmit the coupling torque and need only to be checked for<br />
allowable speed.<br />
Construction — Standard shafts are solid, AISI 1018 or 1020<br />
cold rolled steel. Also available is an optional solid, AISI 1018,<br />
fully turned, hot rolled steel shaft.<br />
Determine the Allowable Shaft Length<br />
A. Select the coupling size per Pages 7 and 26.<br />
B. From Page 26, determine shaft diameter (Dimension SD) for<br />
the coupling selected.<br />
C. From the table below, locate the floating shaft diameter<br />
(Dimension SD) determined in Step B.<br />
D. Determine the allowable shaft length for the required<br />
operating speed.<br />
For Speeds under 540 rpm — Read the maximum allowable<br />
shaft length to the left of the required shaft diameter.<br />
For Speeds over 540 rpm — Trace right from the shaft<br />
diameter determined along the diagonal line to the point of<br />
intersection with the required vertical operating speed line.<br />
Trace right along the horizontal line to the right and read the<br />
maximum allowable shaft length.<br />
E. Determine if shaft requires balancing. Locate point where<br />
operating speed and floating shaft length cross. Balance is<br />
required when point is located to the right of bold line.<br />
F. If a longer shaft is required, reduce the operating speed if<br />
practical, or select the next larger size coupling.<br />
Note: For such conditions, the use of a tubular shaft design<br />
should be considered, refer application details to the local<br />
Falk Representative.<br />
TABLE 10 — Floating Shaft Selections<br />
6 578<br />
5 943<br />
5 064<br />
4 597<br />
MAX SHAFT<br />
LENGTH - mm<br />
(UNDER 540 RPM)<br />
6 273<br />
5 613<br />
4 749<br />
4 318<br />
SHAFT<br />
DIA<br />
(mm)<br />
279,4<br />
254,0<br />
228,6<br />
203,2<br />
165,1<br />
146,0<br />
136,5<br />
120,7<br />
FLOATING SHAFT ALLOWABLE SPEED - RPM<br />
540 600 800 1000 1500 2000 3000 4000 5000 6000<br />
7,620<br />
1170<br />
RPM<br />
1750<br />
RPM<br />
BALANCING OF<br />
SHAFT REQUIRED<br />
6,350<br />
5,080<br />
4 013<br />
3 835<br />
104,8<br />
95,2<br />
3,810<br />
3 429<br />
76,2<br />
3 124<br />
63,5<br />
2 794<br />
2 108<br />
2 438<br />
50,8<br />
38,1<br />
28,6<br />
2,540<br />
2,286<br />
2,032<br />
1,778<br />
1,524<br />
1,270<br />
MAX. FLOATING SHAFT LENGTH - MILLIMETERS<br />
1170<br />
RPM<br />
1750<br />
RPM<br />
1,016<br />
889<br />
BALANCING<br />
NORMALLY NOT<br />
REQUIRED<br />
762<br />
635<br />
508<br />
540 600 800 1000 1500 2000 3000 4000 5000 6000<br />
FLOATING SHAFT ALLOWABLE SPEED - RPM<br />
© The Falk Corporation, 2003 (M421-110) 27
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