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Motion Control – Linear Motion – How Do You Move Articles of Antiquity?

Motion Control – Linear Bearings Application
motion control - engineering edge
Motion Control Application – How Do You Move Articles of Antiquity?

Very Carefully With A High Load Rail System from LM76!

motion control - application

E. Longmeadow, MA – — Motion Control Application -The Boston Museum of Fine Arts (MFA) has to move articles of antiquity from one location to another. In this instance, they are moving a 5000 year old relief (hieroglyphics) weighing 8000 pounds to a new location in the Museum. Here is a frontal photo of the Relief from The Tomb of Senenuka.

motion control - linear motion products

Part of wall from tomb of Senenuka; nine stones fitting together and including two niches; lower left piece smooth limestone; upper far left preliminary black ink sketch; right of this sketch is a complete relief showing two seated figures; central piece has large scene of seated male on the left and other smaller male figure to the right; upper far right male figure relief outline; left of this again a scene of two seated figures at a table.

Senenuka Time of Khufu or Khafre (Maybe Dyn 5?) Overseer of the Pyramid-town of Khufu, Director of King’s wad-priests, Boundary official of a settlement, etc. Read more »

Linear Motion Control Application – Polishing Machine’s Linear Ball Bearing Failures Solved by LM76!

Linear Motion Control Application – Truck Wheel Buffing Machines

motion control - lm76 application

motion control - linear motion products
The Application –

Polishing Aluminum Truck Wheels is done with a polishing machine that has a 36″ vertical stroke indexer, having a 2500 pound load moving @ 4″ per second. The polishing media is like toothpaste with glass in it. It is extremely abrasive, and sticky/tacky.
motion control - wheel buffing

The Problem –

The industrial buffing system is chewing-up linear ball bearings and spitting them out every 2 weeks! This is the situation one of customers found themselves in while for years accepting lost production and costly maintenance shutdowns. When LM76 got a call from a proactive new maintenance manager, we were eager to try a scraper seal design we had recently had success with on another application.

Originally, these systems came with protective bellows which helped keep polishing media from contaminating the 2″ linear ball bearing pillow blocks. According to our maintenance manager, once a bellow was damaged, it was removed and thrown away. Maintenance personnel so disliked having to take off and reinstall bellows that they mysteriously disappeared. Even with protective bellows, aluminum dust mixed with polishing media formed what one mechanic termed, “toothpaste with glass in it.”This abrasive “lapping compound”would stick to shafting, dry and semi-harden. As a bearing rolled along, polishing media would penetrate it’s seals “sliming” balls and clogging ball tracks. This would quickly lead to bearing failure and shaft brinneling (grooving). Needless to mention, routinely replacing linear ball bearings and more costly shafting was too much for the new maintenance manager who called LM76 for help.

The Solution –

motion control - black racer bearing

For this application, we chose our Black Racer Ceramic Coated Linear Bearing. This bearing is extremely tough, is of one piece construction (no mechanical components, no catastrophic failure mode or shaft grooving) and has the longest life test we know of on record. Like linear ball bearings, Black Racer requires lubrication.

John Tarbell (President of LM76), specified a zero clearance beryllium copper scraper seal. Beryllium copper is exceptionally ridgid, extremely hard and wear resistant. The Beryllium copper would trap lubricant and distribute it as a fine, uniform film on the shaft. This film reduces friction, disperses heat and wets shafting. The wetted shaft surface forms a barrier between media and steel – keeping polishing media from cleating into disparities on the shaft (remaining peaks and valleys). Tarbel, said, “A Zamboni doesn’t lay down an inch of ice, it fills in the skate marks.” When the scraper travels on the shaft, it easily lifts the media and moves it along to the end of the stroke. Unlike linear ball bearings, Black Racer has no balls so some residual “slime” is easily accommodated. (Seen below, the beryllium scraper seal is captured between the bearing counter-bored face and the machined steel end cap.) Admittedly, a heavy interference fit dramatically raised system friction but was mitigated because the system is hydraulically driven – driving force is not an issue.

Staying within the form factor of the original OEM design–standard roundway pillow block and shafting–we chose our direct drop-in 2″ closed pillow block and Black Racer Ceramic Coated bearing coupled with our 2″, Class L Rc60 Case Hardened Shafting. Tarbell then designed a steel end cap retainer ring that pinned the beryllium scraper seal against the bearing face.

Note: The bearing leading and trailing faces have machined counter-bores to locate and capture the back of the scraper seal. To keep the retainer ring secured to the pillow block, set screws were positioned on both sides and driven into a slot machined into the OD surface.

motion control - blackracer pillow block

motion control - pillow block bearing assembly

 

 

 

 

 

 

 

 

To follow the NEW Series from LM76, THE ENGINEERING EDGE! and learn about interesting Outside-of-the-Box solutions developed by LM76 to solve some interesting linear motion problems! CLICK HERE

motion control - engineering edge

About LM76

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 PTFE 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.

For additional information contact Mike Quinn at: LM76, 140 Industrial Dr., E. Longmeadow, MA 01028; Telephone: 413-525-4166, Fax: 413-525-3735 or E-Mail: mquinn@lm76.com or visit the website at http://www.lm76.com

And say, “I saw it on MotionShop.com, “The Motion Control Home Page.”


See this and other Motion Control Components from LM76 featured on:

The LM76 Blog

LM76 Catalogs

http://MotionShop.com.com

http://AllMotionBlogger.com

http://Automation-Blogger.com

http://MotionControlBlogger.com

http://motioncontrolBuyersGuide.com

http://MotionControlWeb.com

http://MotionShop.net

http://Catalogs-MotionControl.com

motion control - linear bearings

 

Motion Control – Application – In “Off-Roading” LM76’s Black Racer Bearing is a Winner!

Motion Control – Application – Ceramic Linear Bearings

motion control - linear bearings

Motion Control – Anyone who’s worked on cars knows how critically important ball joints are to steering and suspension. They also know what happens when ball joints fail!

motion control - lm76 products

E. Longmeadow, MA – — Motion Control – Application Story – When an aftermarket manufacturer of off-road steering and suspension systems needed an upper ball joint bearing, they called LM76. These systems are purchased by off-road vehicle owners who want to upgrade their OEM steering and suspension units for hard-hitting environments. Pounding, shock, sand and debris are all part of the mix when it comes to extreme off-roading and LM76 Black Racer bearings are right at home. According to company engineers, after a year of brutal testing, Black Racer met all design goals and exceeded expectations. Read more »

Linear Motion Control – Roll-Slide Mini from LM76

Linear Motion Control – Miniature Linear Slide

Linear Motion Roller Slide Assembly
Read more »

Linear Motion Application – Loading Dock’s Corrosion Problem – Solved by LM76!

Linear Motion Application – Overcoming Loading Dock Corrosion Problems

motion control - linear motion products

The Problem –

motion control problem corrosion

An LM76 customer is a manufacturer of loading dock ramps. These systems are installed in every state and experience all climates and conditions. Each dock section employs a 1″ shaft and linear bearings for length adjustment. Delivery trucks are side-loaded so the platform is adjusted outward to meet the truck body so loaders/unloaders have a safe walkway between building and truck. If the ramp cannot be properly adjusted because its rusted, frozen solid, gaps between the loading dock and the truck body become fall-through hazards for workers.

Why is this system failing? In many northern facilities, accumulated snow and ice are sprayed down with glycol and then salt. The system originally used Rc60, 1060 steel shafting and standard steel shelled, 52 100 linear ball bearings. A bad choice for such a tough, corrosive environment. Quickly, these systems were rendered useless, frozen in place, and hazardous. Read more »

Motion Control – Application – FDA/USDA Compliant Linear Bearings Are – “THE” Only Solution!

Motion Control – FDA/USDA Compliant Application

motion control - application

E. Longmeadow, MA – — Motion Control – Application. What do you do when you’re linear actuator bearings are including cheese debris? Particularly when your cheese slicing system requires FDA/caustic washdown compliance and FDA inspectors are on site reviewing all process operations for included debris which can propagate harmful bacteria. Read more »

Motion Control – The Minuteman  Series, Teflon® Composite Bearings Are Now Available As A Twin Pillow Block Linear Rail Assembly!

Motion Control – Teflon® Composite Twin Bearing/Pillow Block Rail Assembly!

motion control - composit wtin rail assembly

E. Longmeadow, MA –Motion Control – Save time and energy by ordering one or more MinutemanTM M-SRBT Twin Pillow Block Linear Rail Assemblies from LM76. Recognized by engineers, machine builders, and retrofitters, the MinutemanTMSeries of Teflon® composite bearings from LM76 are ideal for applications that involve linear, rotary, and/or oscillating motion. The self lubricating Minuteman Series composite bearings can handle 10 times the load, has a very low coefficient of friction, dampen vibrations, tolerates shock, and are lower in cost than that of conventional linear ball bearings.

motion control - lm76

 

 

These composite bearings can be submerged, washed down with water, high pressure steam, or chemicals, and can operate in harsh, abrasive, and contaminated environments. Read more »

Metric High Precision Sintered Bronze, Bronze Alloy, and Iron Bearings Are “Self Lubricating!”

Motion Control – Metric-High-Precision-Sintered-Bearings
motion control - LM76 Linear Motion Bearings

E. Longmeadow, MA Motion — Control Components – Linear Motion – Available off-the-shelf, cylindrical, self lubricating, sintered bronze bearings from LM76 feature: Very high precision (e.g +2μ to +12μ for 2mm ID bearings), high load capacity (100kg/sq cm), high speed 30,000 rpm) and rapid oscillation capabilities, low/high temperature (-60OC to +230OC), very low coefficient of friction (0.02), and low noise.

motion control - linear motion products

These reliable, economic bearings are available in metric sizes (2 mm to 100 mm ID by 2 mm to 120 mm long) and have applications in: Appliances such as washing machines, exercise equipment, portable machine tools, toys, motors, packaging machinery, garden tools and machinery, vibration damping, and automotive equipment such as alternators. Read more »

Motion Cotrol Application Story – LM76’s JET Rail Linear Bearings and Engineering Exceed the Challenge!

Motion Control – JetRail Linear Bearings Application

Motion Control – Because LM76 understands workplace environments, manufacturing processes, and offers a complete line of linear bearing systems, LM76 was able to solve a problem and eliminate downtime!
motion control - linear bearings
motion control - linear motion products

 

 

E. Longmeadow, MA –  Motion Control — When profile rail guides fail within a week bring production to a standstill LM76 was called on to supply a linear bearing system that would stand up under extreme conditions. This application story is not claiming that LM76 Jet Rail Systems are superior to profile rail guide systems. However, in this harsh environment the LM76 Jet Rail System proved to be the correct engineering option. Read more »

Motion Control – FDA/USDA and 3A-Dairy Compliance Brochure features Linear Motion Components from LM76!

Motion Control – FDA/USDA/3A-Dairy Compliance Brochure

motion control - fda/usda compliance
motion control - lm76
E. Longmeadow, MA — Motion Control Components – Linear Motion – Food processing and beverage plants’ wash down areas are unique environments that undergo harsh treatment from high pressure washers, steam, and a multitude of caustic chemicals used in the cleaning and sanitizing production equipment. OEMs and maintenance departments need to select components that will not trap contaminating debris and can be thoroughly evacuated following Sanitation Standard Operating Procedures (SSOPs). SSOPs are detailed schedules and procedures specifying what to clean, how to clean, how often to clean, and the record keeping used for monitoring. Read more »