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| Efdyn, Inc. | Tulsa, OK | |
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.jpg) | Rotary Dashpots Kinetrol rotary dashpots are precision fluid dampening devices which give a smooth resistance to shaft rotation which increases with angular velocity. Two types of dashpot are available to suit a wide range of applications. They are used to steady drives, decelerate motion and dampen vibration. Standard designs include adjustable or fixed rate devices for continuous rotation or restricted travel applications. We can also engineer dashpots to your specifications. Vane dashpots (KD, LA, LB, LD, & LE Models) Vane dashpots give a restricted travel and high dampening rate suitable for applications with reciprocating motions. Continuous rotation dashpots ( N, Q, S, T, & X -CRD Models) Continuous rotation dashpots give less dampening rate but unlimited travel.  | ||||||||
.jpg) | Efdyn Rotary Dampers Efdyn offers an extensive line of Kinetrol rotary dampers and rotary dashpots. Our units are precision fluid dampening devices that give a smooth resistance to shaft rotation, which increases with angular velocity. These viscous dampers are available for either limited rotation or continuous rotation applications. As with all of Efdyn's products; these are the most rugged and dependable units on the market. Rotary dampers and dashpots are used for speed control, shock absorption, slipping drives, mechanical delays and much more.
Additional Info: http://www.efdyn.com/html/rotaryDampers.html | ||||||||
.jpg) | Kinetrol Model KD SPECIFICATION • Rate: Fixed rate model KD - F Any value (± 10%) between: min: 2.0 lbf.ins/rad/s (0.22 Nm/rad/s) max: 4000 lbf.ins/rad/s (450 Nm/rad/s) • Adjustable rate model: Angle of travel 60° ± ½° External end stops must be provided • Max. safe torque 250 lbf.ins / 28 Nm Continuous power dissipation not to exceed 10W at 20°C ambient • Max. shaft end load 10 lbf / 45 N • Max. shaft side load 40 lbf / 178 N • Ambient temperature range 0°C to 40°C • Frictional torque 0.01 lbf.ins / 0.001 Nm typical • Shaft material Stainless steel 431S29 • Body material Zinc alloy Mazak 3 • Weight: KD - F 14.9 ozs / 423 g KD - A 16.9 ozs / 478 g  | ||||||||
.jpg) | Kinetrol Model LA SPECIFICATION • Rate Adjustable - Max (LA4): 300 Nm/rad/s (2700 lbf.ins/rad/s) Angle of travel 215° ± 5° External end stops must be provided • Max. safe torque 350 lbf.ins / 40 Nm Continuous power dissipation not to exceed 10W at 20°C ambient • Max. shaft end load 2 lbf / 10 N • Max. shaft side load 100 lbf / 450 N • Ambient temperature range0°C to 60°C • Frictional torque 2 lbf.ins / 0.2 Nm typical • Shaft material Stainless steel 441S49 • Body material Zinc alloy Ilzro 16 • Weight: 3.6 lbs / 1.61 kg | ||||||||
.jpg) | Kinetrol Model LB SPECIFICATION • Rate Adjustable - Max (LB4): 400 Nm/rad/s (3500 lbf.ins/rad/s) Angle of travel 240° ± 5° External end stops must be provided • Max. safe torque 1400 lbf.ins / 160 Nm Continuous power dissipation not to exceed 80W at 20°C ambient • Max. shaft end load 5 lbf / 22 N • Max. shaft side load 200 lbf / 890 N • Ambient temperature range 0°C to 60°C • Frictional torque 5 lbf.ins / 0.5 Nm typical • Shaft material Stainless steel 441S49 • Body material Zinc alloy Ilzro 16 • Weight: 13.5 lbs / 6.14 kg | ||||||||
.gif) | Kinetrol Model LD SPECIFICATION • Rate Adjustable - Max (LB4): 4000 Nm/rad/s (35400 lbf.ins/rad/s) Angle of travel 240° ± 5° External end stops must be provided • Max. safe torque 6200 lbf.ins / 700 Nm Continuous power dissipation not to exceed 260W at 20°C • Max. shaft end load 224 lbf / 1000 N pushing on shaft 18 lbf / 80N pulling on shaft • Max. shaft side load 450 lbf / 2000 N • Ambient temperature range 0°C to 60°C • Frictional torque 27 lbf.ins / 3 Nm typical • Shaft material Stainless steel 441S49 • Body material Aluminium alloy LM25 • Weight: 36 lbs / 16.4 kg | ||||||||
.jpg) | SPECIFICATION • Rate Fixed • Max. shaft end load 3 lbf / 13 N • Max. shaft side load 2.2 lbf / 10 N • Ambient temperature range 0°C to 60°C • Frictional torque 0.015 lbf.ins / 0.002 Nm typical • Shaft material Stainless steel 431S29 • Body material Zinc alloy Mazak 3 • Weight: 0.075 lbs / 34 g APPLICATIONS The N -CRD continuous rotation miniature dashpot is particularly suited to instrument and small precision machine applications. Pure viscous damping is produced by shear of a film of silicone fluid. The drum type rotor is supported at both ends by miniature ball races. Static friction is very low. Dashpots can be supplied with various fixed rates which depend on the viscosity of the fluid filling. Viscosity should be specified when ordering to give the required characteristics. Performance curves for different viscosities are shown. Provision is made for temperature expansion of the fluid and no topping up is required during the life of the dashpot. Typical applications include tension control for tape recorders, damping moving parts in small precision machines and detection of shaft rotation. VISCOSITIES AVAILABLE 100; 2,000; 5,000; 12,500; 30,000; 60,000; 500,000 cSt. | ||||||||
.jpg) | Kinetrol Model Q-CRD SPECIFICATION • Rate Fixed • Max. shaft end load 20 lbf / 89 N • Max. shaft side load 5.2 lbf / 23 N • Ambient temperature range 0°C to 60°C • Frictional torque 0.025 lbf.ins / 0.003 Nm typical • Shaft material Mild steel 220M07 • Body material Zinc alloy Mazak 3 • Weight: 7.5 ozs / 214 g APPLICATIONS This small continuous rotation dashpot has a fixed rate performance and is complementary to the larger adjustable rate models S-CRD and T-CRD. It proves to be economical where use of the other models may not be justified. This dashpot is available with double ended shaft (code suffix '- DE'). In this version, due to the extra shaft seal, there is greater stiction torque (less than 0.025 lbf.ins/seal). | ||||||||
.jpg) | Kinetrol Model S-CRD SPECIFICATION • Rate Adjustable • Max. shaft end load 20 lbf / 89 N • Max. shaft side load 26 lbf / 115 N • Ambient temperature range 0°C to 60°C • Frictional torque 0.13 lbf.ins / 0.015 Nm typical • Shaft material Stainless steel 303S31 • Body material Zinc alloy Mazak 3 VISCOSITIES AVAILABLE: 100; 350; 500; 1,000; 2,000; 5,000; 12,500; 30,000;100,000; 500,000 cSt. | ||||||||
.jpg) | Kinetrol Model T-CRD SPECIFICATION • Rate Adjustable • Max. shaft side load 41 lbf / 183 N • Ambient temperature range 0°C to 60°C • Frictional torque 0.5 lbf.ins / 0.056 Nm typical • Shaft material High tensile steel 605M36(T) • Body material Cast aluminium LM 4M • Weight: 5.27 lbs / 2.39 kg This continuous rotation dashpot has an adjustable rate. Adjustment allows the rate to be varied down to 1/4 of the maximum values, for any speed of rotation. The adjuster knob, although marked for reference, is not normally calibrated. VISCOSITIES AVAILABLE - 1,000; 12,500; 30,000; 100,000; 500,000 cSt. | ||||||||
.jpg) | Kinetrol Model X-CRD SPECIFICATION • Rate Fixed • Ambient temperature range 0°C to 60°C • Frictional torque 0.3 lbf.ins / 0.034 Nm typical • Shaft material Mild steel 080A15 (case hardened) • Body material Zinc alloy Mazak 3 • Weight: 0.78 lbs / 355 g • Bearing Single overhung anti-friction bush APPLICATIONS The X -CRD continuous rotation dashpot is value engineered to suit volume applications where unit cost is of paramount importance. Viscous damping is produced by shear of a film of silicone fluid, using a drum type rotor. Static friction is higher than for other dashpots in the range but is not significant for most applications. The dashpot is designed to react pure torsion and therefore side or axial loads should be avoided. Dashpots can be supplied with various fixed rates which depend on the viscosity of the fluid filling. Viscosity should be specified when ordering to give the required characteristics. Provision is made for temperature expansion of the fluid and no topping up is required during the life of the dashpot. Typical applications include damping moving parts in light machinery, e.g. copying machines, control of coil dereeling, control of descent. | ||||||||
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