ACE Controls Main Catalog - ACE - #11

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9 ACE Controls Inc. · 800-521-3320 · (248) 476-0213 · Fax (248) 476-2470 · www.acecontrols.com · email: shocks@acecontrols.com 1. Determine how the object will hit the shock absorber: horizontal motion, inclined or vertical motion, or rotary motion. 2. Use the example pages in this catalog to find the closest match to your application. Horizontal application examples are illustrated on page 10; inclined and vertical examples, page 11; and rotary examples, pages 12 and 13. 3. Select a stroke length from the Model Rating Charts on (pages 18 and 19). If you are uncertain what stroke length is most desirable for your application, use the weight of the object as a guide. For weights under 500 pounds, use a 1-inch stroke; for weights over 500 pounds, use a 2-inch stroke. 4. Use the equations shown to determine energy per cycle (E3), energy per hour (E4) and effective weight (We). 5. Refer to the Model Rating Charts on pages 18 and 19. Compare your step 4 results with the values in the Model Rating Charts columns 3, 4 and 5. A suitable shock absorber must have greater energy per cycle (column 3) and energy per hour (column 5) values than the results you calculated. For best results, keep E3 between 20 and 80 percent of the energy per cycle. In addition, your calculated effective weight must lie within the shock absorber’s range (column 4). Select a suitable shock absorber from the charts on pages 18 and 19. 6. Check the stroke in column 2. • If it matches the stroke in your calculation, the shock absorber you have selected can handle your application. Column 6 provides the page number where you will find additional product information. • If the stroke does not match, proceed to step 7. 7. If a 1-inch stroke was originally chosen, replace it with a 2-inch stroke and return to step 4. If a 2-inch stroke was originally chosen, specify a 1-inch stroke and return to step 4. If you have unsuccessfully tried both the 1-inch and 2-inch stroke calculations, check the energy per cycle on your calculation sheet. If the energy per cycle is less than 225 inch-pounds when using a 1-inch stroke, your application is probably in the range of ACE’s smallest shock absorbers. Study the Model Rating Chart between the MC 9 and the MC 225 H2 selfcompensating models, or between the MA 35 and MA 225 adjustable models. Select a shock absorber that is close to the calculated energy per cycle, energy per hour and effective weight. Use the stroke in column 2, and return to step 4. If you have tried both 1-inch and 2-inch stroke, and the calculated energy per cycle is over 12,000 inchpounds when using the 2-inch stroke, consider using a larger shock absorber. Study the Model Rating Chart list between MC 64100-1 and the CA 4 X 16-7 selfcompensating models, or between the MA 64100 and A 3 X 12 adjustable models. Select a shock absorber that is close to the calculated energy per cycle, energy per hour and effective weight. Remember that in most cases E3 will increase as the stroke increases. Use the stroke in column 2, and return to step 4. 8. If you are still unable to select a shock absorber and the impact velocity is below 1.5 feet/second, consider specifying an ML Series model. Using your calculations based on a 1-inch and 2-inch stroke, repeat step 5, this time using the ML chart on page 19. Be sure that the impact velocity is between .05 and 1.5 feet/second (0.01 and 0.46 m/sec.). 9. If you are uncertain of the proper shock absorber for your application, contact ACE’s Applications Department at 800-521-3320. NOTE: When using more than one shock absorber on an application, divide the quantity of shock absorbers into: We, E3 and E4. To select the best shock absorber for your application, follow these steps: ACE Controls offers industrial and safety shock absorber CAD Files for downloading from the ACE web site at www.acecontrols.com. The CAD File software is titled interfACE. ACE’s Windowsbased sizing software, ACESIZE, is also available for downloading. Both software packages, along with the CAD Files are also available on a CD-ROM. See page 85 for additional information. The shock absorber selection procedure below has been made available for customers who prefer to select without the aid of computer-related technology. Selection Procedure