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High-Speed Locking Cylinder
Tie-rod style mechanism isolates brake from air supply
Randy Frank, Contributing Editor -- Design News, September 3, 2006
SMC Corp. of America's CNA series locking cylinder locks in both directions and delivers the same holding force on both extension and retraction. Isolating the brake mechanism from the air line keeps contaminants and moisture off the brake for improved performance. In addition, increased surface area and improved brake material allow for high-speed operation. Both improvements increase the life of the unit. In the event of lost air pressure, a standard manual override allows the lock to be released.
The series uses a wedge principle (a tapered ring) and steel ball combination to actuate the brake and achieve high-braking power. Two rows of precision steel balls ensure high-locking power, as well as stable locking and release operation. The high-speed dynamic lock can stop moving loads from speeds of up to 1,000 mm/sec (40 inches/sec). The floating taper-ring assembly provides improved alignment with the piston rod and stable locking force. The high-speed dynamic lock can stop moving loads from speeds of up to 1,000 mm/sec (40 inches/sec).
Units achieve an operating speed of 2 to 40 inches/sec with an operating air pressure from 12 to 145 psi (0.08 to 1.0 MPa). Proof pressure is 215 psi (1.48 MPa). The ambient and fluid operating temperature ranges from 14 to 158F (-10 to 70C). The spring holding force is 198 to 1,210 lbf (882 to 5390N).
Available in five bore sizes (40 to 100 mm), the series uses a cartridge-style brake unit that simplifies field brake replacement. Target applications for the locking cylinder include: intermediate stops, emergency stops, and drop prevention in packaging, automotive and specialty machinery.
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 A tapered wedge and two rows of precision steel balls evenly distribute the locking force to the cylinder piston rod. Larger View |
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| Useful Links | ||
| For more information on the CNA series CNA locking tie-rod cylinder, go to http://rbi.ims.ca/4932-539. | ||
