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Linear Guide Availability

September 14, 2018

There is clearly an availability problem with profile(square) rail linear guide bearings. Deliveries quoted by many manufacturers are waaay out there. This is obviously a significant inconvenience for companies trying to maintain production schedules or designers trying to build prototypes.

It is also understood how difficult the process can be for substituting parts in a design which has been “tested and proven” over time. So, what do you do?

That answer will be different depending upon who you ask. However, if you feel that in your situation you can consider alternatives, Lintech may have some options for you.

Lintech Linear Guides

The Lintech models MR, ARC, HRC, WRC, ARR & HRR are drop-ins for many different manufacturers’ linear guides. Each of the models above are available with many different options in order to meet the hole spacing, height requirements, etc. that are pre-existing in a given design.

Most of the models above are readily available from Lintech. Deliveries will vary a bit depending upon the specific configuration required. Lintech cuts rails to length locally and there are no pre-set rail lengths. Pricing is generally in line with market pricing – and maybe even better if you are a smaller to mid-size volume OEM.

So, if you feel you have the flexibility to consider a change, or at least want to investigate the opportunity further, contact Lintech.

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Carriage & Linear Bearing Life Considerations

August 14, 2018

Lintech has several calculation tools and tables linked to their website. Some of them look pretty simple. Some maybe not so much. For instance, there is a calculator for Carriage and Linear Bearing Life. Looking quickly, you might think a particular table has “X” load rating. I’m only going to apply a fraction of that so I’m good to go – right? Not so quick.

  • You ought to consider some sort of a safety factor which is a bit subjective based upon the potential resulting damage of a worst case failure.
  • What might different operating temperature factors do to the linear motion system?
  • Are there shock loads or vibration present in the application?
  • Could orientation of the load and/or linear device raise questions about the system life?

Lintech provides a calculator which helps you to at least consider potential factors causing an additional impact on the life of a linear motion system. Then it would be the designer’s responsibility to determine any other external conditions which could have an impact.

Below is form available from the App Sizing portion on the right side of the Lintech home page where you can load in the capacity from a Lintech table, the application load and some initial safety factors. Once you hit calculate, you’ll see another table which reflects the anticipated life in inches while considering the level of the factors which you applied. In addition to that, you see a table on the bottom which helps you to determine if further safety considerations ought to be considered.

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To learn a bit more about “linear motion life factors”, have a look at pages 7, 8 & 9 of the link:  https://www.lintechmotion.com/pdffiles/Lintech_Round_Rail_Components_2016-10.pdf

Back Driving Torque

July 30, 2018

There is a variety of formula’s which can be useful for linear motion applications. Lintech has some useful tools on their website for quick solutions to common questions. For instance, in a vertical motion application where a ball screw is being utilized, you may want to know how much force is required to hold the load in place should power be lost.

Back Driving

By choosing the “Apps” link on the right side of the Lintech home page, then clicking on “back drive torque”, you can bring up a calculator for determining the required torque to hold the load in place. Then you can specify a brake to perform the task in that event. There are a few other calculators there to help in your design process.

Easy Tool for Determining Required Motor Torque

July 16, 2018

Lintech provides a tool on their website for determining the required motor torque necessary when using a Lintech table. On the right-hand side of the home page, there is a link for “sizing apps”. When you click on that you will see a page that the different Lintech screw driven tables, belt driven tables, rotary tables and ball screw assemblies. When you choose the series table you are using you will be provided with options for “move profiles”.

Torque Calculator

When you plug in some table information, application requirements, as well as the motor inertia from a model you are considering, you will be provided with a lot of information including total torque required. You can take that value and look at the torque curve for the motor to see if it has the required torque you need at the motor speed required.

The tool provides a relatively painless method for choosing a motor with enough power at your desired move speed.

Electric Brakes

June 29, 2018

Lintech has offered “Power-Off” brakes for ball screw assemblies and ball screw driven tables for decades. The concept behind a power-off brake is, typically, to prevent the application load from free-falling in the event of a power failure. A free-falling load could hurt surrounding personnel, damage to production material, adjacent machinery or the drive system itself. A power-off brake is NOT designed to engage while the power is on to slow down the screw from turning. That should be accomplished with the motor power.

Power-Off Brake

With Lintech ball screws and screw driven positioners, a brake is mounted to the screw extension located on the support housing opposite the motor end. When power is applied to the brake, the brake is opened or “released”. For proper emergency holding of the ball screw, the electric brake needs to be interfaced to a position controller or relay network. Lintech has 24 & 90 VDC brakes and the associated power supplies.

Lintech Provides More

June 15, 2018

Lintech provides many “component” solutions such as precision shafting, bushings, profile rail linear guides, ball screws, driven “systems”, etc. However, because they have a heavy focus on overall motion control, assistance is available to suggest and provide associated products to form a total motion solution.

Multi-Axis Systems

Yes, Lintech offers standard catalog items, but the task of sizing and then locating of the appropriate surrounding parts to complete a motion “package” is very time consuming. If the designer can leverage assistance from a vendor with significant experience and tried-and-true motion products, design time and efforts can be efficiently focused elsewhere.

Naturally, if the designer is to rely on a vendor for accurate assistance, some detail must be provided about the intended goals of the design. Drawings along with information about the application is also extremely helpful to gain the best concept.

Lintech Application Description

Linear Motion Systems For Harsh Environments

May 31, 2018

Lintech can modify linear motion tables to be more suitable for harsh environments. Lintech has always attempted to be an accommodating linear motion table supplier with regard to special modifications. The process is made easier with US based manufacturing and design communications. Some manufacturing organizations are better suited by sticking with the basic catalog offering but often it is the smaller organizations which can be more adaptable.

Lintech will routinely modify tables with stainless hardware for applications requiring a higher level of corrosion resistance than common industry standards.

Stainless Components

Lintech has also offered complete customs for specific environments………….

Lintech Custom - Harsh Environment

Contact Lintech for solutions to custom requirements that might include environmental, load, travel, etc. www.lintechmotion.com

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