Shock Absorbers and Rate Controls

Under the Enidine brand, we are a global leader in the design and manufacture of standard and custom energy absorption and vibration isolation product solutions. Product ranges include shock absorbers, rate controls, air springs, wire rope isolators, heavy duty buffers and emergency stops. From Original Equipment Manufactures (OEM) to aftermarket applications, we offer a unique combination of product selection, engineering excellence and technical support to meet the toughest energy absorption requirements. Industry leading energy absorption and vibration isolation solutions.

Table of Contents Product Selection General ECO OEM/OEMXT Series (Adjustable Shock Absorbers) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-20 Technical Data and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-34 Adjustment Techniques/Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-36 TK/STH Series (Non-Adjustable Shock Absorbers) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Company Overview ITT Enidine Overview Company Overview With its world headquarters located in Orchard Park, New York, USA, ITT ENIDINE Inc. is a world leader in the design and manufacture of standard and custom energy absorption and vibration isolation product solutions within the Industrial, Aerospace, Defense, Marine and Rail markets. Product ranges include shock absorbers, gas springs, rate controls, air springs, wire rope isolators, heavy industry buffers and emergency stops. With facilities strategically located throughout the world and in partnership with our vast global network of distributors,...

New Technologies and Enhancements Research and Development New Products and Services ITT Enidine engineers continue to monitor and influence trends in the motion control industry, allowing us to remain at the forefront of new energy absorption and vibration isolation product development. Our experienced engineering team has designed custom solutions for a wide variety of challenging applications, including automated warehousing systems and shock absorbers for hostile industrial environments such as glass manufacturing, among others. These custom application solutions have proven to be critical...

Theory of Energy Absorption ITT Enidine Theory of Energy Absorption Overview As companies strive to increase productivity by operating machinery at higher speeds, often the results are increased noise, damage to machinery/products, and excessive vibration. At the same time, safety and machine reliability are decreased. A variety of products are commonly used to solve these problems. However, they vary greatly in effectiveness and operation. Typical products used include rubber bumpers, springs, cylinder cushions and shock absorbers. The following illustrations compare how the most common products...

Theory of Energy Absorption ITT Enidine Overview When conditions change from the original calculated data or actual input, a shock absorber’s performance can be greatly affected, causing failure or degradation of performance. Variations in input conditions after a shock absorber has been installed can cause internal damage, or at the very least, can result in unwanted damping performance. Variations in weight or impact velocity can be seen by examining the following energy curves: This is explained by observing the structural design of the automotive type and the lower strength of materials commonly...

■ Shock Absorber Sizing Examples Typical Shock Absorber Applications_ Follow the next six steps to manually size ITT Enidine shock absorbers: Shock Absorber Sizing Examples STEP 1: Identify the following parameters. These must be known for all energy absorption calculations. Variations or additional information may be required in some cases. A. Weight of the load to be stopped (Kg). B. Velocity of the load upon impact with the shock absorber (m/s). C. External (propelling) forces acting on the load (N), if any. D. Cyclic frequency at which the shock absorber will operate. E. Orientation of the...

Shock Absorber Sizing Examples Typical Shock Absorber Applications Overview SYMBOLS a = Acceleration (m/s2) A = Width (m) B = Thickness (m) C = Number of cycles per hour d = Cylinder bore diameter (mm) D = Distance (m) Ek = Kinetic energy (Nm) Et = Total energy per cycle (Nm/c), E k + Ew EtC= Total energy to be absorbed per hour (Nm/hr) Ew = Work or drive energy (Nm) Fd = Propelling force (N) Fp = Shock force (N) H = Height (m) Hp = Motor rating (kw) I = Mass moment of inertia (kgm2) K = Radius of gyration (m) L = Length (m) P = Operating pressure (bar) Rs = Mounting distance from pivot point...

Shock Absorber Sizing Examples Shock Absorber Sizing Examples Typical Shock Absorber Applications Overview EXAMPLE 3: Vertical Moving Load with Propelling Force Upward STEP 1: Application Data (M) Mass = 1 550 kg (V) Velocity = 2 m/s (d) 2 Cylinders bore dia. = 150mm (P) Operating pressure = 5 bar (C) Cycles/Hr = 200 STEP 2: Calculate kinetic energy M 1 550 x V2 = x 22 EK = 2 2 EK = 3 100 Nm STEP 3: Calculate work energy FD = 2 x [0,0785 x d2 x P] – [9,8 x M] FD = 2 x [0,0785 x 1502 x 5] – [9,8 x 1 550] FD = 2 472,5 N EW = FD X S EW = 2 472,5 x 0,125 EW = 309 Nm STEP 1: Application Data (M) Mass...

Horizontal Moving Load with Propelling Force STEP 1: Application Data (M) Mass = 900 kg (V) Velocity = 1,5 m/s (d) Cylinder bore dia. = 75mm (P) Operating pressure = 5 bar (C) Cycles/Hr = 200 STEP 2: Calculate kinetic energy EK = -M xV2 Ek = 900 x 1,52 Ek =1 012,5 Nm Assume Model OEMXT 2.0M x 2 is adequate (Page 30). STEP 3: Calculate work energy Fd = 0,0785 xd2 xP Fd = 0,0785 x 752 x5 Fd = 2 208,9 N Ew = Fd x S Ew = 2 208,9 x 0,05 Ew = 110 Nm/c STEP 4: Calculate total energy per cycle Et = Ek + EW Et = 1 012,5 + 110 Et = 1122,5 Nm/c STEP 5: Calculate total energy per hour EtC = Et xC EtC = 1122,5...