Motion Control Technology

Bearings & Other Mechanical Components

June 2008

Linear Bushings
MISUMI USA Inc. (Schaumburg, IL) has introduced a family of self-lubricating linear bushings in assorted styles, with straight or mini-flanged versions. The bushings carry three times the rated life span of conventional bushings. The performance of these bushings centers on the design of its MX lubrication unit. An integral fiber pad delivers the lubricant to the shaft surface through a capillary action, thus maintaining a constant lubricating film between ball bearing and shaft.

This design extends the maintenance interval on the linear bearings, saving time for applications involving numerous mountings or difficult access. The design also reduces assembly time, as these bushings are pre-loaded with lithum soap-based grease. The bushings come in single or double bushing lengths with either flangeless, round, square or compact mini-flanged styles. The bushings are made of high-quality 52100 bearing steel with Duracone M90 or equivalent resin pad cases and retainers, plus Nitrile rubber seals. They are rated to operate over a -20 to +80ºC range.

For Free Info Visit http://info.hotims.com/15132-309

April 2008

PTFE Bearing Liner
A maintenance-free PTFE bearing liner from Aurora Bearing (Montgomery, IL) provides an alternative to fractured race and light series spherical bearings in hydraulic cylinders in both Metric and inch versions. They are best used in static situations where potential misalignment cannot be accommodated by plane bushings or clevises and pins.

Maintenance-free PTFE lined bearings have a close tolerance fit between ball and race, improving precision and life over metal-on-metal fractured race bearings. Aurora bearings with the self-lubricating PTFE liner carry an ET-2RS suffix. The company can also manufacture full swage design equivalents for demanding dynamic applications.

For Free Info Visit http://info.hotims.com/15128-306

Mini Bearing
Igus Inc. (East Providence, RI) is offering a highly-resistant bearing with a wall thickness of just 3 mm. Part of the company’s line of igubal(R) spherical bearings, the bearing requires minimal installation space, is self aligning, requires no lubrication, and is easily installed. The bearing’s housing and spherical ball liner absorbs vibrations differently than steel. It is made of igumid G, a reinforced polymer. The internal, independently moving spherical ball is made of iglide(R) L280, with a minimum coefficient of friction with the shaft.

For Free Info Visit http://info.hotims.com/15128-312

High-Temp Bearing Materials
Metallized Carbon Corp. (Ossining, NY) has unveiled the Metcar Grade 2500 and Metcar Grade 9800 from its Resistox (TM) family of high temperature mechanical grades. Treated with a specially formulated oxidation inhibitor, these bearings and thrust washers offer greatly increased oxidation resistance without sacrificing their self-lubricating properties, extending life.

For operating temperatures from 700° to 1000º F, Metcar Grade 2500 is ideal for high-temperature applications where conventional lubricants would break down and fail. Metcar 9800 addresses extreme temperature installations between 1000° to 1100° F, such as furnaces, dryers, high temperature conveyors and dampers. Bearings manufactured from Metcar materials are self-lubricating, non-galling, dimensionally stable and have high compressive strength. The oxidation-resistant materials are completely homogeneous and provide continuous lubrication for their service life.

For Free Info Visit http://info.hotims.com/15128-320

December 2006

Roller Bearings
AST Bearings (Montville, NJ) introduced the High Carbon Chromium Steel Tapered Roller Bearings line, comprised of the inner and outer rings, tapered rollers, and a cage (roller retainer). The rings and rollers carry the load; the cage spaces and retains the rollers on the inner ring. The product is stable under heavy loads, is resistant to harsh or contaminated environments, and designed for moderate speed applications. Metric and imperial sizes are available. Standard stock sizes are: ID 15 – 240 mm or 0.59 – 9.45" to OD 35 – 40 mm or 1.38 – 15.75". Customization is available.

For Free Info Visit http://info.hotims.com/10958-304

Corrosion-Resistant Bearings
MRC Bearing Services (Kulpsville, PA) released the custom-engineered “HNCR” steel bearings made from high-nitrogen corrosion-resistant steel. The bearings display a hardness of 58 HRC, and have an extended fatigue life. Chromium has been added to further augment durability and corrosion resistance. The bearings may be customized.

For Free Info Visit http://info.hotims.com/10958-329

For Free Info Visit http://info.hotims.com/10958-304

October 2006

Couplings
Helical Products Co. (Santa Maria, CA) introduced single-piece, flexible couplings to compensate for mechanical movement irregularities. The units require neither maintenance nor lubrication; they offer constant rotational velocity, smooth bearing loads, and feature no backlash. Outside diameters (OD) range from 3/8 to 3". Metric OD of 15, 20, 25, 30, 40, and 50 mm are available. Imperial and metric bore sizes may be combined. The units are available in aluminum or stainless steel.

For Free Info Visit http://info.hotims.com/10952-321

August 2006

Ball Bearings
MRC Bearings Services (Kulpsville, PA) offers the R Series inch-sized stainless ball bearings for small shaft diameters. The single-row, deep-groove radial conrad-type bearings carry radial and thrust loads in either direction at high speeds. Bore sizes range from 1/8 to 1 ½", and open, shielded, and sealed bearings are available. Basic radial dynamic load ratings range from 70 lbf to 3,780 lbf and basic radial static load ratings range from 27 lbf to 2,650 lbf, depending on type. The bearings are supplied with pressed steel cages. Two-piece riveted machined phenolic or bronze cages are available.

For Free Info Visit http://info.ims.ca/5786-312

June 2006

Toroidal Roller Bearings
Serving as non-locating bearings in large electric motors, SKF USA’s (Kulpsville, PA) CARB® toroidal roller bearings accommodate heavy radial loads and compensate for misalignment. Suitable for both coupled and belted loads, the bearings offer users a single bearing solution for motors, regardless of mounting method. The self-aligning bearings adjust for axial expansion of the shaft internally while self-guiding rollers maximize load capacity. The bearings reduce skidding on raceways, enabling their use on coupled motors with relatively light loads. A range of sizes is available with seals and optional cages. Custom designs are also available.

For Free Info Visit http://info.ims.ca/5659-311

Linear Bushing
THK America (Schaumburg, IL) has introduced a self-adjusting power linear bushing with cages engineered of resin that continually lubricates the rolling elements. The bushing also features a hardened steel ball plate with a ground groove that is slightly larger than the ball, which results in increased contact area between the ball and the ball plate. The ball retainer and outer sleeve are made of a lightweight, low-friction, wear-resistant synthetic polymer, allowing for quiet operation. The convex shape of the ball plate provides a pivot point at the center, which permits self-adjustment up to 0.5°.

For Free Info Visit http://info.ims.ca/5659-333

February 2006

Ball Bearings
SKF USA (Kulpsville, PA) offers self-aligning ball bearings that allow for angular misalignment of the shaft relative to the housing without affecting operation. The ball bearings gain their self-aligning capability from a design incorporating two rows of balls with a common sphere raceway in the outer ring. They are available with cylindrical or tapered bores, in bore diameters ranging from 5 mm to 130 mm.

Basic bearing types include open designs and sealed versions featuring contact seals on both sides. The steel-reinforced rubber seals protect against contaminants during handling and operation. Sealed bearings are supplied as standard, with a lithium base grease suitable for operating temperatures from -22 to 230°F. Users have a choice of cage materials and bearings designed with inner rings, and bore tolerances for easy mounting and dismounting.

For Free Info Visit http://info.ims.ca/5655-321

Stock Springs
Lee Spring (Brooklyn, NY) offers Type 316 stainless steel stock compression springs in wire sizes from 0.006" through 0.072". The compression springs feature squared and ground ends, and are ultrasonically cleaned. The springs are suitable for applications in medical products and processes, pharmaceuticals, food processing and handling, aerospace products, semi-conductors, consumer products, and heat exchangers. They can be manufactured in alloys including 17-7, beryllium copper, phosphor bronze, and Inconel.

For Free Info Visit http://info.ims.ca/5655-314

December 2005

Specialty Valve Products
Mead Fluid Dynamics (Chicago, IL) offers a series of valve products designed for circuit design applications. Pneumatic timers are used to delay the air signal coming in or out of an air component. This delay may be adjusted from 0.75 to 30 seconds. Timers are available in either normally closed or normally open models. Impulse relay valves stop constant pneumatic signal with buildup of back pressure to allow the user to shift a doublepressure piloted valve, even though there are overlapping pilot signals.

Relay valves convert a sustained airflow from a three-way pilot valve into a momentary pulse or bleed, which shifts a control valve and then closes. Air to electric switches provide an air pilot signal for contact closure up to 15-amp capacity and solder terminals that accept up to #14 wire. Dyla-Trols inline flow controls provide laminar flow with fast resetting and repeatability with each cycle.

For Free Info Visit http://info.ims.ca/5294-303

Flexible Couplings
SECS (Mt. Vernon, NY) has introduced the Reli-a-Flex® line of one-piece flexible couplings that provides transfer of motion between two rotating shafts while considering parallel, angular, and axial misalignments. The coupling’s double-slit pattern provides torsional stiffness and negligible radial and axial bearing loads. The couplings have zero backlash and one-piece construction.

For Free Info Visit http://info.ims.ca/5294-313

Press-Fit Spring Plungers
Press-fit spring plungers from Carr Lane Mfg. (St. Louis, MO) are suitable for installation in softer materials such as aluminum, wood, or plastic. They are applicable when a threaded hole is impractical and/or adjustment is not required. A shoulder on the spring-loaded plungers provides a fixed seating position and resists detent force. The plungers are available in six sizes each of light or heavy force, in steel or stainless steel, and with a stainless or Delrin® ball.

For Free Info Visit http://info.ims.ca/5294-304

October 2005

Roller Bearings
SKF® Explorer single-row cylindrical roller bearings from SKF USA (Kulpsville, PA) feature contact geometry and are suitable for applications such as compressors, industrial gearboxes, and transmissions. The bearings offer high radial load-carrying capacity and logarithmically crowned rollers. Bearing rollers are guided between integral open flanges on one of the rings, which contributes to reduced friction and lower operating temperature. Optimized surface finishes favor lubricant film formation and help achieve correct rolling motion of the rollers.

The bearings feature honed inner and outer rings, raceways, and rollers. Cage materials include molded glass fiber-reinforced polyamide or optional machined brass and pressed steel. Available bore sizes range in diameter from 20 mm to 220 mm.

For Free Info Visit http://info.ims.ca/5292-310

August

Constant Force Spring
LinMot® (Delavan, WI) offers the MagSpring™ constant force spring, which is totally passive and requires no electricity or air to operate. It provides constant force throughout the entire range of motion. The simple design consists of two rugged components (a stator and a slider), and can operate under wash-down conditions. The MagSpring is available in forces from 11 N to 60 N and strokes from 1.97" (50 mm) to 8.3" (210 mm). Custom sizes and capabilities are available by request.
For Free Info Visit http://info.ims.ca/5215-309

Hydraulic Shock Absorbers
The 6000 Series of Cushioneer® hydraulic shock absorbers from Deschner Corp. (Santa Ana, CA) self-adjust over a wide range to give smooth control of impact energy as low as 15 in-lbs or as high as 1500 in-lbs, while avoiding the need for readjustment due to impact or temperature change.

Speed variations due to temperature changes are almost imperceptible due to the use of constant-viscosity silicon fluid instead of hydraulic oil. Available in 1/2-, 1-, and 2-inch stroke models, they are hermetically sealed and may be operated in any position for millions of cycles without leaking.
For Free Info Visit http://info.ims.ca/5215-304

June

Coupling System
Ringfeder Corp.’s (Westwood, NJ) TOK Coupling System is used to connect combustion engines to dynamometers for engine testing and evaluation. The couplings are self-centering and backlash and maintenance free. The system also provides the lowest possible torsional stiffness through the use of two coupling elements.

The TOK Couplings are available for torque ranges from 420-4,000 Nm and for engine speeds from 7,000-10,000 rpm. They are able to absorb axial, radial, and angular misalignment. Five different couplings are available, including cardan shaft connections for standard applications, intermediate shaft for low stiffness, and constant velocity shaft for high-speed testing.
For Free Info Visit http://info.ims.ca/5081-315

Sealing Rings
All-metal NILOS®-Rings available from SKF Motion Technologies (Bethlehem, PA) offer space-saving sealing protection for tapered roller bearings, which traditionally have been difficult to seal costeffectively. Three standard styles are available: Type AV for the outer ring, Type JV for the inner ring, and Type AK for “double sealing” the outer ring using a unique two-disk design.

Rings are manufactured from galvanized steel (brass or stainless can be specialordered) and available in a wide range of sizes. They can be used for circumferential speeds up to 1,000 surface feet/minute at the contact diameter.
For Free Info Visit http://info.ims.ca/5081-322

February

Hybrid Bearings
SKF USA’s (Kulpsville, PA) SKF® hybrid bearings combine silicon nitride (ceramic) rolling elements with steel rings to serve as lighter, harder, and more durable alternatives to conventional all-steel counterparts. These bearings can run at high speeds and low operating temperatures, offer inherent insulating properties, and exhibit superior wear-resistance for optimized performance and longer service life. Standard types include hybrid single row deep groove ball bearings with bore diameters from 5 mm to 110 mm, sealed and greased-for-life ball bearings protected by steel-reinforced synthetic rubber seals and filled with premium lubricant conforming to SKF’s own particular specification, and open basic design bearings available without seals.
For Free Info Visit http://info.ims.ca/4465-910