Power Lock Shaft
Faustina Bartsch
As the locking is done by frictional force using the wedge effect, the shaft and hub can be locked simply by tightening the bolt, without the need for fixing with a key or set screw, and removal is easy.
By tightening the locking bolts, the taper rings A / B approach each other and generate contact pressures P and P' on the inner race. The contact pressure of P and P' generates a frictional force that completely locks the hub and shaft.
At this time, radial forces P and P' that press the shaft and the inner surface of the hub against each other are generated by the wedge effect. The force of P and P' generates a frictional force that strongly locks the hub and shaft.
Applicable shaft diameters range from a small diameter of Φ5 to a maximum of Φ500, and each series meets a wide range of needs, from highly compatible general-purpose type to types for small-diameter hubs, large-capacity, external locking, nut-tightening and types for a wide range of shaft tolerances.
I noticed that the shafts of these motors are effectively locked even when they are not powered. I understand that this is not incredibly common in stepper motors and I wonder how this is being accomplished in this motor.
The "locking" is simply due to the high gear ratio, which amplifies the high shaft and surface friction in the cheap plastic gears. If you try to force the output shaft you will probably strip one or more gears.
These motors exist primarily for one application, to move vanes that control air-flow in vehicle
heater/air-conditioning systems. Thus its a good thing they cannot be readily back-driven, or they
would lose alignment.
Various types have slightly different gear ratios too, which confuses people - but once you
know the original purpose you realize they are not needed to have an integral number of
steps per revolution. They have approximately 2050 steps per revolution, within a percent
or two - some types are exactly 2048 steps, some are not.
Simple and quick assembly and disassembly, complete freedom from maintenance and wear, absolutely backlash-free power transmission: Our Shaft Locking Assemblies (Shaft Clamping Elements or Shaft Power Lock) are friction-locked shaft-hub connections manufactured to high quality standards. They are suitable for the precise fastening of all types of hubs, for example, toothed gears, running wheels and chain sprockets, levers, cam discs, belt and brake discs, slip-on gears, couplings or flanges, on shafts and axles.
Compared to external clamping connections like shrink discs, locking assemblies are installed between shaft and hub. By tightening the clamping screws, inner and outer rings press themselves onto the contact surfaces of the components to be connected, thus creating a friction-fit press connection. This allows not only high torques but also axial and radial as well as bending loads to be transmitted reliably. Our Keyless Locking Assemblies are the superior alternative to conventional shrink-fits, wedge, keyway or polygonal connections and offer outstanding concentricity and resistance to alternating torsion. Our locking assemblies are available to users in various standard designs and sizes as well as customised special solutions.
Great care has been taken to ensure the correctness of the information contained in this publication but no liability can be assumed for any incorrect or incomplete data. Our technical department reserves the right to final interpretation.
Simple and quick assembly and disassembly, complete freedom from maintenance and wear, absolutely backlash-free power transmission: RINGFEDER Locking Assemblies are friction-locked shaft-hub connections manufactured to the highest quality standards. They are suitable for the precise fastening of all types of hubs, e.g. toothed gears, running wheels and chain sprockets, levers, cam discs, belt and brake discs, slip-on gears, couplings or flanges, on shafts and axles. Compared to external clamping connections, e.g. shrink discs, locking assemblies are installed between shaft and hub. By tightening the clamping screws, inner and outer rings press themselves onto the contact surfaces of the components to be connected, thus creating a friction-fit press connection. This allows not only the highest torques but also axial and radial as well as bending loads to be transmitted reliably. Keyless RINGFEDER Locking Assemblies are the superior alternative to conventional shrink-fits, wedge, keyway or polygonal connections and offer outstanding concentricity and resistance to alternating torsion. Our locking assemblies are available to users in various standard designs and sizes as well as customised special solutions.
Keyless shaft bushings provide a secure shaft-to-hub connection and are ideal for positioning and locking shaft components in a system. Their keyless design allows for quick and easy adjustment and prevents excessive stress and wear on shaft components.
ETP-POWER keyless shaft bushings from Zero-Max consist of a double-walled hardened steel sleeve and flange filled with a specially designed pressure medium. The flange contains a single actuation screw piston with a seal that is used to pressurize and maintain pressure in the connection. The design is optimized to provide higher radial load capacity than the other single-screw models. Also, in the flange are two pre-machined bores that can be used to attach ETP-POWER to the mounted components when the connection is not pressurized.
Contact us to learn more about our products or request a quote.
It can replace single keywey and spline ,in order to realize the connection between machinery parts (such as gear wheel,flywheel) and shafts,so the loading can be transmitted.Through the function of high strength of bolt when locking device is working,enormous strengh of tight holding power between hub ,inner loop and shaft are produced.When bearing the weight and loading depend on connection power between locking device and machinery and additional frictional torce to transmission torsion or power on shaft .
There's plenty of quality wholesale power lock coupling to choose from at Alibaba.com! From hydraulic couplings that open and close with pressure, universal joints that swivel 360 degrees, or steel coupler shafts used when connecting two single shafts - we have it all!
The universal coupling joint is designed to connect two shafts and provides a strong attachment mechanism. This joint can be made of steel, stainless steel, or polymeric compounds. We also have flexible motor coupling tools that allow for slight misalignment between the joined components. There is also a wide selection of rigid shaft coupling components.
Some types of shaft couplings may have elastomeric bearings that support the axel or spindle that rotates at high speeds due to engine or engine transmission. For power lock coupling components that are less prone to wear and tear, consider the variety of magnetic shaft coupling components made of steel with adjustable zinc plated hubs for corrosion resistance. There are several advantages of using a magnetic system over the typical motor shaft coupling types. Magnetic systems are usually designed to reduce contact between parts to prolong the lifespan of the entire system. An additional benefit of the system is that it can be much quieter than other types of mechanical coupling systems. Furthermore, magnetic systems could be much easier to install and take apart, and this saves time when performing maintenance on the system. Find more wholesale power lock coupling at Alibaba.com!
The new Eleiko Power Lock Bar is a unique and rather interesting take on the classic Eleiko Training Bar. Matter of fact, the Power Lock is really just a variant of the Eleiko Training Bar. They share all the same hardware, same specifications, and high level of performance; only the new Power Lock has deep grooves cut into the length of the sleeves. Grooves that look really cool, mind you.
* There is an inch of total loadable sleeve length lost when the Power Lock Collars are used. This is simply due to the location of the last groove in the sleeve. I only mention this because someone will inevitably do the math and realize that the difference between 16 & 12 is greater than the max width of the collars.
In the intro I mentioned that the Power Lock is a variant of the Training Bar. They have the same shaft, same number of precision needle bearings, same chrome finish, and even the same price. Everything is the same save for the grooved sleeves of the Power Lock.
Matter of fact, the only difference between the Power Lock and the Full Competition Bar in terms of hardware (not counting the grooved sleeves, of course) is a more moderate knurl on the Power Lock, and the lack of an IWF sticker. You get the same 215k PSI super high whip shaft, same 10 precision needle bearings, same overall bar specifications, and even the same little brush for cleaning chalk and gunk out of the knurling.
Because of the tightening potential of the Power Lock collars and the strict manufacturing tolerances of high-end bars, the Power Lock bar may be the quietest bar on the market. If you think about it, even steel change plates can be locked down tightly. Couple this with an actual quiet bumper plate like the XF and your noise problems may be solved once and for all. Just a thought!
Yeah I referred to CrossFit as an application more for the individual athlete (your serious Games-type athlete who trains at home frequently and with big weights) and not the boxes. No box is going to equip with Eleikos and let their users have a free-for-all with $1000 bars.
Hi
No, I am buying new collars for vintage bar back up.I just happen to collect a lot of collars (Mostly old York spin locks). I would only buy this new bar if it was in stainless steel,like Ivanko raw power bar.I did see photo of the old Soviet bar when sold as a new set with beautiful polished edged plates.