- Home/
- Lifting Equipment/
- Screwjacks, Linear Actuators, Rotary Unions and ACME Ball Screws and Nuts/
- Screwjack Components/
- Actuator Connecting Shafts

Actuator Connecting Shafts
Connecting shaft made from either turned, ground or polished steel.
ACS-4149



Problem Scenario – A common system operating problem stems from connecting shafts made from standard steel, which are often bowed or out-of-round.
This results in a whipping effect while the system is being run with the connecting shaft working its way loose from the system at high speeds and doing a great deal of damage to the system’s equipment.
Solution – Duff-Norton connecting shafts, which are furnished with close tolerance Turned, Ground, and Polished steel for smooth rotation.
Features
- Turned, Ground, and Polished steel.
- Shaft material is machined from cold-drawn bar.
- Furnished with ANSI-standard in-line keyways.
- Coordinates well with Duff-Norton Couplings.
- (pages 136-137) and Block Supports (pages 140-141).
Dimensions and Minimum Size

Model | SH50 | SH63 | SH75 | SH100 | SH125 | SH150 | SH163 | SH15 | SH200 | SH225 | SH250 | |
Minimum Shaft Length "L" (inch) | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 8 | 10 | 10 | |
Shaft Diameter "D" (inch) | Nominal | 1/2 | 5/8 | 3/4 | 1 | 1-1/4 | 1-1/2 | 1-5/8 | 1-3/4 | 2 | 2-1/4 | 2-1/2 |
Actual | 0.500 | 0.625 | 0.750 | 1.000 | 1.250 | 1.500 | 1.625 | 1.750 | 2.000 | 2.250 | 2.500 | |
0.499 | 0.624 | 0.749 | 0.999 | 1.249 | 1.499 | 1.624 | 1.749 | 1.999 | 2.249 | 2.499 | ||
Keyway Width (inch) | 1/8 | 3/16 | 3/16 | 1/4 | 1/4 | 3/8 | 3/8 | 3/8 | 1/2 | 1/2 | 5/8 | |
Keyway Flat (inch) | 1.25 | 1.25 | 1.25 | 1.25 | 1.5 | 1.75 | 1.75 | 2 | 2 | 2.5 | 2.5 |
Shaft Selection Criteria
Instructions:
- Find a torque value that is greater than or equal to your calculated torque requirements.
- Use the second column to find the required shaft diameter (rounding up is recommended.)
- Check the third column for the maximum allowable shaft span before supports are required.
- Match your selected shaft’s maximum allowable speed (rpm) to actual shaft speed (rpm). Increasing your selected shaft size is recommended until it falls into the allowable range.
Typical Shaft Torque (inch/lbs) | Nominal Shaft Diameter* (inch) | Maximum** Distance Between Supports (inch) | RPM'S Not to Exceed*** | ||||||||||
Typical Shaft Lengths (inches) | |||||||||||||
36 | 48 | 60 | 72 | 84 | 96 | 108 | 120 | 132 | 144 | 156 | |||
20 | 0.51 | 54.60 | 1802 | 1014 | 649 | 450 | 331 | 253 | 200 | 162 | 134 | 113 | 96 |
40 | 0.73 | 61.30 | 2143 | 1205 | 771 | 536 | 394 | 301 | 238 | 193 | 159 | 134 | 114 |
50 | 0.81 | 65.50 | 2372 | 1334 | 854 | 593 | 436 | 333 | 264 | 213 | 176 | 148 | 126 |
80 | 0.87 | 68.80 | 2548 | 1433 | 917 | 637 | 468 | 358 | 283 | 229 | 190 | 159 | 136 |
100 | 0.92 | 71.40 | 2695 | 1516 | 970 | 674 | 495 | 379 | 299 | 243 | 200 | 168 | 143 |
150 | 1.01 | 76.30 | 2982 | 1677 | 1074 | 746 | 548 | 419 | 331 | 268 | 222 | 186 | 159 |
200 | 1.09 | 80.10 | 3204 | 1802 | 1154 | 801 | 589 | 451 | 356 | 288 | 238 | 200 | 171 |
250 | 1.15 | 83.10 | 3388 | 1906 | 1220 | 847 | 622 | 476 | 376 | 305 | 252 | 212 | 180 |
300 | 1.21 | 85.70 | 3546 | 1995 | 1277 | 887 | 651 | 499 | 394 | 319 | 264 | 222 | 189 |
350 | 1.25 | 87.90 | 3686 | 2073 | 1327 | 921 | 677 | 518 | 410 | 332 | 274 | 230 | 196 |
400 | 1.30 | 89.90 | 3811 | 2144 | 1372 | 953 | 700 | 536 | 423 | 343 | 283 | 238 | 203 |
450 | 1.34 | 91.70 | 3925 | 2208 | 1413 | 981 | 721 | 552 | 436 | 353 | 292 | 245 | 209 |
500 | 1.37 | 93.30 | 4029 | 2266 | 1451 | 1007 | 740 | 567 | 448 | 363 | 300 | 252 | 215 |
600 | 1.44 | 96.20 | 4217 | 2372 | 1518 | 1054 | 775 | 593 | 469 | 380 | 314 | 264 | 225 |
700 | 1.49 | 98.70 | 4383 | 2465 | 1578 | 1096 | 805 | 616 | 487 | 394 | 326 | 274 | 233 |
800 | 1.54 | 100.90 | 4532 | 2549 | 1631 | 1133 | 832 | 637 | 504 | 408 | 337 | 283 | 241 |
900 | 1.59 | 102.90 | 4667 | 2625 | 1680 | 1167 | 857 | 656 | 519 | 420 | 347 | 292 | 249 |
1000 | 1.63 | 104.70 | 4792 | 2695 | 1725 | 1198 | 880 | 674 | 532 | 431 | 356 | 299 | 255 |
1250 | 1.72 | 108.70 | 5067 | 2250 | 1824 | 1267 | 931 | 712 | 563 | 456 | 377 | 317 | 270 |
1500 | 1.80 | 112.00 | 5303 | 2983 | 1909 | 1326 | 974 | 746 | 589 | 477 | 394 | 331 | 282 |
1750 | 1.92 | 114.90 | 5511 | 3100 | 1984 | 1378 | 1012 | 775 | 612 | 496 | 410 | 344 | 293 |
2000 | 1.94 | 117.50 | 5698 | 3205 | 2051 | 1425 | 1047 | 801 | 633 | 513 | 424 | 356 | 303 |
2250 | 2.00 | 119.80 | 5869 | 3301 | 2113 | 1467 | 1078 | 825 | 652 | 528 | 437 | 367 | 313 |
2500 | 2.05 | 122.00 | 6025 | 3389 | 2169 | 1506 | 1107 | 847 | 669 | 542 | 448 | 377 | 321 |
3000 | 2.15 |
125.70 | 6306 | 3547 | 2270 | 1577 | 1158 | 887 | 701 | 568 | 469 | 394 | 336 |
3250 | 2.19 | 127.40 | 6434 | 3619 | 2316 | 1608 | 1182 | 905 | 715 | 579 | 479 | 402 | 343 |
3500 | 2.23 | 129.00 | 6554 | 3687 | 2359 | 1639 | 1204 | 922 | 728 | 590 | 487 | 410 | 349 |
4000 | 2.31 | 131.90 | 6776 | 3812 | 2440 | 1694 | 1245 | 953 | 753 | 610 | 504 | 424 | 361 |
4500 | 2.38 | 134.50 | 6979 | 3926 | 2512 | 1745 | 1282 | 981 | 775 | 628 | 519 | 436 | 372 |
5000 | 2.44 | 136.90 | 7165 | 4030 | 2579 | 1791 | 1315 | 1008 | 796 | 645 | 533 | 448 | 382 |
6000 | 2.55 | 141.10 | 7499 | 4218 | 2700 | 1875 | 1377 | 1055 | 833 | 675 | 558 | 469 | 399 |
7000 | 2.65 | 144.80 | 7794 | 4384 | 2806 | 1949 | 1432 | 1096 | 866 | 701 | 580 | 487 | 415 |
Problem Scenario – A common system operating problem stems from connecting shafts made from standard steel, which are often bowed or out-of-round.
This results in a whipping effect while the system is being run with the connecting shaft working its way loose from the system at high speeds and doing a great deal of damage to the system’s equipment.
Solution – Duff-Norton connecting shafts, which are furnished with close tolerance Turned, Ground, and Polished steel for smooth rotation.
Features
- Turned, Ground, and Polished steel.
- Shaft material is machined from cold-drawn bar.
- Furnished with ANSI-standard in-line keyways.
- Coordinates well with Duff-Norton Couplings.
- (pages 136-137) and Block Supports (pages 140-141).
Dimensions and Minimum Size

Model | SH50 | SH63 | SH75 | SH100 | SH125 | SH150 | SH163 | SH15 | SH200 | SH225 | SH250 | |
Minimum Shaft Length "L" (inch) | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 7 | 8 | 10 | 10 | |
Shaft Diameter "D" (inch) | Nominal | 1/2 | 5/8 | 3/4 | 1 | 1-1/4 | 1-1/2 | 1-5/8 | 1-3/4 | 2 | 2-1/4 | 2-1/2 |
Actual | 0.500 | 0.625 | 0.750 | 1.000 | 1.250 | 1.500 | 1.625 | 1.750 | 2.000 | 2.250 | 2.500 | |
0.499 | 0.624 | 0.749 | 0.999 | 1.249 | 1.499 | 1.624 | 1.749 | 1.999 | 2.249 | 2.499 | ||
Keyway Width (inch) | 1/8 | 3/16 | 3/16 | 1/4 | 1/4 | 3/8 | 3/8 | 3/8 | 1/2 | 1/2 | 5/8 | |
Keyway Flat (inch) | 1.25 | 1.25 | 1.25 | 1.25 | 1.5 | 1.75 | 1.75 | 2 | 2 | 2.5 | 2.5 |
Shaft Selection Criteria
Instructions:
- Find a torque value that is greater than or equal to your calculated torque requirements.
- Use the second column to find the required shaft diameter (rounding up is recommended.)
- Check the third column for the maximum allowable shaft span before supports are required.
- Match your selected shaft’s maximum allowable speed (rpm) to actual shaft speed (rpm). Increasing your selected shaft size is recommended until it falls into the allowable range.
Typical Shaft Torque (inch/lbs) | Nominal Shaft Diameter* (inch) | Maximum** Distance Between Supports (inch) | RPM'S Not to Exceed*** | ||||||||||
Typical Shaft Lengths (inches) | |||||||||||||
36 | 48 | 60 | 72 | 84 | 96 | 108 | 120 | 132 | 144 | 156 | |||
20 | 0.51 | 54.60 | 1802 | 1014 | 649 | 450 | 331 | 253 | 200 | 162 | 134 | 113 | 96 |
40 | 0.73 | 61.30 | 2143 | 1205 | 771 | 536 | 394 | 301 | 238 | 193 | 159 | 134 | 114 |
50 | 0.81 | 65.50 | 2372 | 1334 | 854 | 593 | 436 | 333 | 264 | 213 | 176 | 148 | 126 |
80 | 0.87 | 68.80 | 2548 | 1433 | 917 | 637 | 468 | 358 | 283 | 229 | 190 | 159 | 136 |
100 | 0.92 | 71.40 | 2695 | 1516 | 970 | 674 | 495 | 379 | 299 | 243 | 200 | 168 | 143 |
150 | 1.01 | 76.30 | 2982 | 1677 | 1074 | 746 | 548 | 419 | 331 | 268 | 222 | 186 | 159 |
200 | 1.09 | 80.10 | 3204 | 1802 | 1154 | 801 | 589 | 451 | 356 | 288 | 238 | 200 | 171 |
250 | 1.15 | 83.10 | 3388 | 1906 | 1220 | 847 | 622 | 476 | 376 | 305 | 252 | 212 | 180 |
300 | 1.21 | 85.70 | 3546 | 1995 | 1277 | 887 | 651 | 499 | 394 | 319 | 264 | 222 | 189 |
350 | 1.25 | 87.90 | 3686 | 2073 | 1327 | 921 | 677 | 518 | 410 | 332 | 274 | 230 | 196 |
400 | 1.30 | 89.90 | 3811 | 2144 | 1372 | 953 | 700 | 536 | 423 | 343 | 283 | 238 | 203 |
450 | 1.34 | 91.70 | 3925 | 2208 | 1413 | 981 | 721 | 552 | 436 | 353 | 292 | 245 | 209 |
500 | 1.37 | 93.30 | 4029 | 2266 | 1451 | 1007 | 740 | 567 | 448 | 363 | 300 | 252 | 215 |
600 | 1.44 | 96.20 | 4217 | 2372 | 1518 | 1054 | 775 | 593 | 469 | 380 | 314 | 264 | 225 |
700 | 1.49 | 98.70 | 4383 | 2465 | 1578 | 1096 | 805 | 616 | 487 | 394 | 326 | 274 | 233 |
800 | 1.54 | 100.90 | 4532 | 2549 | 1631 | 1133 | 832 | 637 | 504 | 408 | 337 | 283 | 241 |
900 | 1.59 | 102.90 | 4667 | 2625 | 1680 | 1167 | 857 | 656 | 519 | 420 | 347 | 292 | 249 |
1000 | 1.63 | 104.70 | 4792 | 2695 | 1725 | 1198 | 880 | 674 | 532 | 431 | 356 | 299 | 255 |
1250 | 1.72 | 108.70 | 5067 | 2250 | 1824 | 1267 | 931 | 712 | 563 | 456 | 377 | 317 | 270 |
1500 | 1.80 | 112.00 | 5303 | 2983 | 1909 | 1326 | 974 | 746 | 589 | 477 | 394 | 331 | 282 |
1750 | 1.92 | 114.90 | 5511 | 3100 | 1984 | 1378 | 1012 | 775 | 612 | 496 | 410 | 344 | 293 |
2000 | 1.94 | 117.50 | 5698 | 3205 | 2051 | 1425 | 1047 | 801 | 633 | 513 | 424 | 356 | 303 |
2250 | 2.00 | 119.80 | 5869 | 3301 | 2113 | 1467 | 1078 | 825 | 652 | 528 | 437 | 367 | 313 |
2500 | 2.05 | 122.00 | 6025 | 3389 | 2169 | 1506 | 1107 | 847 | 669 | 542 | 448 | 377 | 321 |
3000 | 2.15 |
125.70 | 6306 | 3547 | 2270 | 1577 | 1158 | 887 | 701 | 568 | 469 | 394 | 336 |
3250 | 2.19 | 127.40 | 6434 | 3619 | 2316 | 1608 | 1182 | 905 | 715 | 579 | 479 | 402 | 343 |
3500 | 2.23 | 129.00 | 6554 | 3687 | 2359 | 1639 | 1204 | 922 | 728 | 590 | 487 | 410 | 349 |
4000 | 2.31 | 131.90 | 6776 | 3812 | 2440 | 1694 | 1245 | 953 | 753 | 610 | 504 | 424 | 361 |
4500 | 2.38 | 134.50 | 6979 | 3926 | 2512 | 1745 | 1282 | 981 | 775 | 628 | 519 | 436 | 372 |
5000 | 2.44 | 136.90 | 7165 | 4030 | 2579 | 1791 | 1315 | 1008 | 796 | 645 | 533 | 448 | 382 |
6000 | 2.55 | 141.10 | 7499 | 4218 | 2700 | 1875 | 1377 | 1055 | 833 | 675 | 558 | 469 | 399 |
7000 | 2.65 | 144.80 | 7794 | 4384 | 2806 | 1949 | 1432 | 1096 | 866 | 701 | 580 | 487 | 415 |
Contact Us About This Product
If you wish to receive a quote for this product, please use the 'Pricing' tab above, this form is for general enquiries regarding this product only.
You can also Request a Quote using the Buy/Quote tab above!
You can easily add more than one item to the Quote Request. This is highly recommend as we will be able to suit your needs much more efficiently.
Share this page!

Save this QR code
for use on Smart Phones