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The scientist Blaise Pascal formulated the principle of pressure propagation in liquids many years ago:
”A liquid confined in a vessel which is subjected to pressure distributes the pressure uniformly upon the walls of the vessel. ”
ETP has explored the many positive qualities in this principle, developed it further and applied it to the hub-shaft connections.
”A hydraulic pressure medium confined in a double-walled sleeve is pressurized (with screws/pistons or with an external pump). The pressure is distributed evenly along and around hub/shaft. The double-walled sleeve expands uniformly and gives an even contact pressure against shaft and hub ”.
The ETP-Principle works because of the hydraulic system: compact design, fast mounting, easy to position, good runout, does not damage the contact surfaces and is easy to dismantle. These qualities are important today and will be even more important in the future.
With increasing requirements on down sizing the machines, better runout/balance, increased machine speeds, shorter downtime for service and increased precision, is why the ETP hydraulic hub-shaft connections are choosen for more and more designs.
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ROTEX®
Torsionally flexible jaw-type coupling
Axial plug-in, good dynamical features
Failsafe, vibration reducing
Max. torque: 70,000 Nm
Max. bore diameter: 200 mm |
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Actuated wave hub connection with high truth of running
SPIETH printing cases are better feather-hard wave hub connections with a truth of running of 0,01mm or. Constructed after the proven SPIETH Kraftschlussprinzip the printing cases have high security forces when homogeneous demand the connecting units. Harmful stamping due to local voltage peaks are avoided. By an axial manipulation, alternatively in an integrated way or externally, steel diaphragm radially against hub drilling and wave are pressed and it develop a closed force river between the printing case and the connecting units. Due to the adding play a simple assembly as well as disassembly without special tool are ensured.
SPIETH Druckhülsen belong to the few elements, which are suitable also for an automated employment. An extensive company standard program provides for requirement-fair and economical solutions with high availability. On the basis of their requirements special solutions can be compiled and offered ready to be installed.
The printing cases in the overview:
- AK/IK - AL/IL for external clamping introduction
- DSK/DSL with integrated clamping introduction
- DSM with integrated clamping introduction for motor shafts (k6/m6) |
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ETP-HYLOC, due to its robust design, is ideally suited to work in difficult environments and heavy operations like steel rolling mills, process industry etc. An interesting application, among many, has been fastening of rolls to shafts. ETP-HYLOC is fast to mount, has good concentricity and can take high radial loads.
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CHARACTERISTICS
1. SLIT INNER RING
Low load losses and pressures on the hub.
2. BALANCING OF SMALLER DEVIATIONS IN TOLERANCES
For more information please contact our Technical Department.
3. HIGHEST RELIABILITY
Applicable for static, dynamic and impact loads.
4. SIMPLE MANUFACTURE OF THE COMPONENTS
Only low demands are made to the functional surfaces of the clamped
parts.
5. ABSOLUTE INTERCHANGEABILITY
Shrink Discs RINGFEDER® operate without any form closure.
6. EASY MOUNTING
Machining or fitting work is not required, standard tools suffice.
7. SHORT ASSEMBLY TIMES
Cost savings especially in serial production.
8. EASY REMOVAL
After loosening of the locking screws, the Shrink Disc RINGFEDER® is
released. The hub can be moved on the shaft freely.
9. LOW SUSCEPTIBILITY TO CONTAMINATION
Increased durability, as after tightening of the locking screws the
contact surfaces are pressed firmly together. Dirt and moisture cannot
ingress the functional surfaces. |
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Powerful and compact
Torque transmission is possible by means of PETER shrink-on disks.
The principle is thoroughly convincing especially in input and output connections by means of hollow shafts. Contrary to keyed connections, the non-positive connection by means of shrink-on disks permits considerably thinner wall thicknesses for the hollow shafts since the greatest part of the torque transfer is absorbed by the shrink-on disk and the shaft is not weakened by additional slots.
This results in lower shaft diameters and consequently volumetric savings in the remaining system. Weight, moments of inertia and space can be elegantly saved in this manner.
Other factors in favour of shrink-on disks are
• high performance density
• detachable connection
• rapid and simple assembly
• economic use
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ETP Transmission AB is specialized in development and manufacturing of high precision hydraulic locking devices.
A new hydraulic hub-shaft connection assortment of the more common ETP-Products are now introduced in stainless steel.
The demand from the food and process industries is increasing for stainless steel hub-shaft connections, surface coatings and plating are no longer sufficient.
The three most common types of the ETP-Products, ETP-CLASSIC, ETP-MINI and ETP-EXPRESS, are now available as standard items.
ETP-CLASSIC Type R, recommended for all normal needs.
For shaft sizes from 15 to 50 mm.
ETP-MINI Type R, for small shafts with sizes from 6 to 14 mm.
ETP-EXPRESS Type R, especially suitable for applications where adjustments
of the hub are made frequently or because of the need for radial access.
For shaft sizes from 15 to 50 mm
All surfaces exposed to the environment are made of stainless steel. In for example food processing this meets essential requirements.
Choose, for your application, the optimum hub-shaft connection in stainless steel
from ETP.
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Taper bushing, Material Cast iron GG25, Type from 1008 to 5050
QD bushing, Material steel C45, Type JA,SH,SDS,SD,SK,SF,E,F
Split taper bushing, Material steel C45, Type G,H,P1,P2,B,Q1,Q2,R1,R2,S1,S2
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RIGIFLEX®
- torsionally rigid and free from backlash
- positive power transmission
- negligible restoring forces in cases of spatial displacement
- balanced, synchronous operation, no maintenance, no wear
- max. torque = 400.000 Nm |
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| Torsionally Rigid Shaft Couplings - High torsional spring rigidity | Extremely high alternating torques | Large variant range | Low mass inertia | ATEX Conform available |
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Rating:
- Torque [Nm]: 80 - 144000
- Speed [min-1]: 1500 - 13900
Geometry/dimensions:
- External diameters up to [mm]: 69 - 645
- Bores up to [mm]: 325
Transmission element:
- Type: Tensioned multi-discs
- Material: Stainless spring steel
Types with:
- Flange connectors
- Jackshafts, including in shortened version with internal hubs, available as optional flange-mounted version.
Note:
Available as API 610 version on request, with list of exceptions including API 671. |
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Couplings of type series HK..
are particularly used for incremental and absolute encoders for high requirements to be met concerning precisce angular transmission free from play - torsion rigidity. |
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Zero-Max's New ServoClass Couplings are specifically designed to meet the precision positioning requirements and high reverse-load characteristics common to many of today's AC and DC servomotor applications.
Aided by Finite Element Analysis, the flexible discs accommodate higher torque, high speed and misalignment without premature failure due to fatigue or shock loads. In addition, ServoClass Couplings' one-piece assembly and their lightweight make them the ideal solution for a variety of precision servomotor applications.
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| ... products without technical information |
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Rigid couplings 
