Category Archives: Camera Slider

Linear Motion Control – One Piece ETX Linear Bearing/Pillow Blocks Can Be Used In Radioactive Environments!

Motion Control – ETX Pillow Block/Bearings for Radioactive Environments

motion control pillow blocks/bearings

E. Longmeadow, MA Motion — Control Components – Linear Motion – LM76 now offers one piece ETX Linear Bearing/Pillow Blocks that will not degrade in a radioactive environment! Machined from a solid block of self lubricating ETX, linear bearing-blocks have high strength, excellent wear resistance, low coefficient of friction, and excellent dimensional stability at higher temperatures As there is no other materials such as PTFE seals or lubricants these bearing-blocks are maintenance free. Custom designed for use in a nuclear power plant these linear bearing/pillow blocks travel on ceramic coated shafting (also supplied by LM76) completely submerged in radioactive water.

To see the “Motion Control Application – ETX Pillow/Block Bearings for Radioactive Environments” CLICK HERE

motion control - lm76

Designed with a slight interference fit between bearing ID and shaft, contaminates are scraped from the shaft’s surface. The low frictional characteristics of ETX have little impact on drive force. They are now available in Inch and Metric sizes.

Linear Motion – Roll-Slide Mini from LM76

Linear Motion Roller Slide Assembly

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linear Motion Low Cost Slide System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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LM76 Low Cost Linear Motion System

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linear Motion System compared

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Application – Camera Slider

Linear Motion Camera Slider

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linear Motion System Application Chart

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LM76 also manufacturers a broad variety of FDA & USDA compliant bearings and shafting, in inch sizes of .25 inches to 1.5 inches, and a FDA & USDA compliant profile rail and slide system that can easily be integrated into new and existing applications. The bearing options include: Self-lubricating FDA & USDA compliant Teflon® composite bearings in a 304 stainless steel shell, and lower cost bearings with a ceramic coated shell and FDA & USDA compliant liner. Bearings are available in closed and open configurations, and are drop-in replacements for all inch sized linear ball bearings.

Founded in 1976, LM76 has been a leading designer/manufacturer of linear bearings, slides and linear motion systems. LM76 is renowned for its industry leading Minuteman Teflon® Composite linear bearings. LM76 is a leading supplier of precision linear shafting: RC60, 300 Series Stainless Steel, and ceramic-coated aluminum shafting. LM76 also offers several FDA/USDA compliant linear bearings and slides for the food processing, pharmaceutical, medical, and packaging industries.

Linear Motion Bearings & Systems Overviews

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For additional information contact Mike Quinn at: LM76, 140 Industrial Dr., E. Longmeadow, MA 01028; Telephone: , Fax: 413-525-3735 or E-Mail: mquinn@lm76.com or visit the website at http://www.lm76.com

Overview-Mini-Slide-08-01

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Linear Bearing Engineers Design Camera Sliders for the Pro and Beginner!

Designed by Linear Bearing Engineers Camera Sliders for the Beginner and the PRO

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The difference between rolling and sliding friction in camera sliders. Mike Quinn

Take a quarter and roll it on its edge across a table – goes forever and moves quickly. Now take that quarter and lay it on its side and push it…that’s the difference. Sleeve bushings inherently have much more surface area under load. Simply put, they have big feet. Conversely, a ball and roller have much smaller feet ensuring them a meaningfully lower co-efficient of friction. A ball offers point contact loading and loosely reside in 4 rows within a steel or plastic shell:

ball

These balls literally kick each other along as the balls roll down the shaft. Because they have so little contact area, the coefficient of friction is as low as .001 – they roll easily and smoothly. The drawbacks in a camera slider are readily recognizable:

1. Resonance – noise – ZING! ZING! ( Metal on metal contact and because they push each other from load to preloads, they create resonance, noise and vibration.
2. They are made from steel and can rust – they require lubrication.

Rollers have internal ball or needle bearings at their core, between the inner and outer race. They are separated in a retainer, unlike linear ball bushings which run loose in their track ways.

roller roller

These are sealed and lubricated for life. They have more contact area but the coefficient of friction remains low approximately .003 – not as low as the ball – but very close. These rollers come in dual angular contact ( gothic arch ) or V geometries. They are very smooth, take high loads/moment loads ( overhanging loads )and provide great stiffness. They are however steel and they run on steel shafting or V groove rails. They can produce noise and are vulnerable to the elements.

Plastic Sleeve Bearings are truly all weather and can run very smoothly and tolerate debris. However, the real world coefficient of friction is around .2 – factors higher than ball and rollers. They are also prone to a phenomena called edge loading. This effect can cause the carriage plate ( slider ) to ratchet or get sticky due the bearings digging into the shaft. This is particularly troublesome when you attempt to slide the carriage plate with top heavy rigs like a DSLR with a Red Rock system. You will need two hands.

There is an answer…Camera Motions new ” Silent Slider “

Why? Because we offer a solid, 1 piece precision machined aluminum carriage block that is black anodized. Not an extrusion that is cheap and has varying tolerances one lot to another. We have selected the best industry urethane cam followers with needle bearing rollers – tight and true. Moreover, the rollers damp any noise or vibration yet hold a 25 pound load. Smooth, quiet and solid. The Silent Slider is a product of linear motion engineering – pure and simple. It was was designed to run on a 16mm twin extruded rail which is ubiquitous in the the camera slider industry. Keep your rail and tripod shoe and move to the future – The” Silent Slider!”

Let engineering win – not salesmen. Only $ 230.00. Call Mike Quinn @ 1-800-698-5820.