Apex Universal Joint Catalog - Tecno Italia s.r.l

Instructions to Calculate the Correct Joint Size
1. Multiply operating speed (in RPM’s) by operating
angle (in degrees) to get the RPM-working angle
factor (X-Axis).
Intermittent Operation Parameters:
• Operating angle less than 5°: On time must not
exceed 50% cycle time and cannot be greater than
5 minutes.
• Operating angle 5°-10°: On time must not exceed
30% of total cycle time and cannot be greater than 4
minutes.
• Operating angle greater than 10°: On time must
not exceed 20% of total cycle time and cannot be
greater than 3 minutes.
TRANSMITTED
TORQUE
N-m Lbs.-in.
For Intermittent Operation:
2. Find the intersecting point between transmitted
torque (Y-Axis) and RPM-working angle factor
(X-Axis).
3. Choose the universal joint performance curve
which is directly above the intersecting point from
Step 2.
For Continuous Operation:
2. Find the intersecting point between 2 times the
transmitted torque (Y-Axis) and RPM-working angle
factor (X-Axis).
3. Choose the universal joint performance curve
which is directly above the intersecting point from
Step 2.
10K
5K
110K
50K
1K
10K
JOINT SIZE
(HUB OUTSIDE DIAMETER)
500
5K
4.0 In. (101.60 mm)
100
50
10
1K
500
100
3.0 In. (76.20 mm)
2.5 In. (63.50 mm)
2.0 In. (50.80 mm)
1.75 In. (44.45 mm)
1.50 In. (38.10 mm)
1.25 In. (31.75 mm)
5
1
50
10
1.0 In. (25.40 mm)
0.875 In. (22.23 mm)
0.75 In. (19.05 mm)
0.625 In. (15.88 mm)
0.50 In. (12.70 mm)
5
0.375 In. (9.53 mm)
1000 3000 5000 7000 9000 11,000 13,000
15,000
20
1
RPM WORKING ANGLE FACTOR