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Frontline Couplings - Selection Guide for Series 1
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Determine the nominal torque(Tn) in "in-lb" as follows:
Nominal Torque = (H.P x 63025) / RPM -
Using the "Service Factor Chart" , select the appropriate Service Factor( Fs) for your application.
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Calculate the design torque (Td) as follows:
Design Torque = Nominal Torque x Service Factor -
Using the "Coupling Rating Chart" below, in the Design Torque Column, locate the nearest higher rating and find the corresponding coupling size to the left.
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Compare the driver/driven shaft size to the maximum bore available in the coupling selected. If it is smaller than the driver/driven shaft sizes, then go further down the "max.bore" column to select the coupling which can accomodate these shaft sizes. Check Stock Bore sizes in the chart .
Series 1 Coupling Rating Chart
Coupling Size |
Design Torque(in-lb) |
Max Bore | Bushing Per Hub | Max. RPM | Hub OD | HP@ 1200 RPM | HP @ 1800 RPM | HP @ 3600 RPM |
| A | 8,965 | 1.375" | 3 | 6000 | 4.500" | 171 | 256 | 512 |
| B | 22,200 | 2.000" | 6 | 5250 | 5.250" | 423 | 634 | 1268 |
| C | 35,103 | 2.500" | 8 | 4500 | 6.000" | 668 | 1003 | 2005 |
| D | 50,995 | 3.000" | 10 | 3750 | 6.750" | 971 | 1456 | 2913 |
| E | 69,733 | 3.750" | 12 | 3600 | 7.500" | 1328 | 1992 | 3983 |
| F | 115,747 | 4.000" | 16 | 3600 | 9.000" | 2204 | 3306 | 6611 |
| G | 146,107 | 5.000" | 16 | 3600 | 11.000" | 2782 | 4173 | 8346 |
| H | 201,609 | 6.000" | 20 | 3600 | 12.000" | 3839 | 5758 | 11516 |
Series 2 Coupling Rating Chart
Coupling Size |
Design Torque(in-lb) |
Max Bore | Bushing Per Hub | Max. RPM | Hub OD | HP@ 1200 RPM | HP @ 1800 RPM | HP @ 3600 RPM |
| I | 294,953 | 5.000" | 14 | 3600 | 11.000" | 5,616 | 8,424 | 16,848 |
| J | 392,169 | 6.000" | 16 | 3600 | 12.500" | 7,467 | 11,200 | 22,401 |
| K | 492,828 | 7.000" | 18 | 3600 | 13.750" | 9,383 | 14,075 | 28,150 |
| L | 604,962 | 8.000" | 20 | 3600 | 15.000" | 11,519 | 17,278 | 34,556 |
| M | 728,570 | 9.00" | 22 | 3600 | 16.250" | 13,872 | 20,808 | 41,616 |
| N | 849,884 | 10.000" | 24 | 3600 | 16,182" | 16,182 | 24,273 | 48,546 |
For available stock sizes and for specific applications, Please contact us.
Caution! As in all rotating equipment,caution should be exercised to follow all applicable safety procedures to avoid damage to equipment or injury to personnel
Frontline Industries, Inc. | 990 Chancellor Avenue | Irvington NJ 07111 | 800.890.7325 | e-mail: info@frontlineindustries.com
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