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Round Rail Shafting Products

November 14, 2018

Lintech provides many products for the round rail linear guide marketplace. Shafting and ball bushings may be considered “old style”, however, they have remained popular products because they provide smooth, low drag motion. Profile rail guides are more precise but tend to have more drag due to preloading. In addition, round rail products are relatively easy to install because they allow for more misalignment than profile rail guides. Therefore, there is less chance of binding if there is slight misalignment between rails or the drive system.

Lintech_Round_Rail_Bearings_Cat

There are many variations and accessories for these round rail shafting products which have evolved over the years to support all kinds of application requirements.

Lintech carries a large stock of these products in the USA and pricing is very competitive!

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Motor Mount Options

October 31, 2018

Usually when looking for a positioning table it will need to be driven by a motor – probably a stepper or servo motor. Although there are some motor standards for dimensions, there are many motors which do not follow any standards. Somehow, the motor will need to be mounted to the positioning table. Lintech has pre-designed many different motor mounts. Some follow “NEMA” dimensional standards but many others do not. Regardless, Lintech can create a motor mount for the designers’ motor of choice.

NEMA 34 motor mount and hand crank

For applications which may have space constraints, motor wraps are also available so that the motor can be placed parallel on top, left, right, or below the table.

Motor Wraps

Contact Lintech with all your positioning system requirements.

Customized Motion Solutions

October 16, 2018

Lintech has a great deal of experience at designing and building “customer specific” linear motion assemblies. A custom could be as simple as adding custom machined holes, to designing and building a full-blown multi-axis system from some notes on a napkin.

X-Y with frame, motors, etc.

Since Lintech has been through the custom build process so many times, it is pretty smooth and the lead-time for a custom system is quite reasonable.

Contact Lintech with your specifications.

Lintech Versatility

October 1, 2018

The 170 series linear motion tables are offered with a broad range of options and configurations. The 170 can be supplied with 2 different carriage lengths supported by up to 6 linear bearings. The 6-inch carriage can have 2 or 4 bearings underneath. The 12-inch carriage can have up to 6 bearings. This choice enables the same table cross section to have an 11,670-pound load rating. The longer carriage with more bearings also dramatically increases the moment load capability.

170 Series Carriage Options

https://www.lintechmotion.com/products2.cfm?ModelNo=170&t=Group6

 

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.

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.

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