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Linear bearings & guideways are primarily used in positioning table (positioning stage) applications.
The main function of a positioning table's linear or rotary bearing system is to carry the user mounted load while the table is in motion. The bearings are also a key element in determining the overall positioning table accuracy, repeatability, straightness and flatness.
Each bearing design provides advantages and disadvantages in load capacity, size, cost, stiffness, and friction. Selecting the right linear or rotary bearing system for a positioning table application is critical.
The four primary linear motion bearings used in positioning table applications are:
Cross Roller Linear Bearings feature cylindrical rollers with ground "V" ways. The larger surface contact between the rollers & "V" ways typically increases the table load capacity by up to 3 times more over a comparable ball & rod type system.
These table designs also produce better flatness and straightness specifications over traditional ball & rod type systems. Thus cross roller linear bearings are typically used in higher accuracy type of applications.
Round Rail Linear Bearings use four bushings with recirculating ball bearings which are mounted within either two, or four pillow blocks (aluminum or steel housings). The contact point between the recirculating balls in the bushing and the round shaft produces a very low friction positioning table. The greater number of balls contacting the ground shaft provides for a larger load capacity system. This table design provides long travel lengths, good load capacities, large moment load capacities, and can accommodate protective cover plates & waycovers.
Square Rail (linear guide) Bearing Systems are very similar in operation to the round rail systems. The recirculating ball bearings in the bearing block contact more surface area on the curved ball race on the square rail which provides a table that has increased load capacity, increased moment load capacity, and higher system rigidity over the round rail positioning table.
These linear bearings will have better flatness & straightness specifications than a round rail system. This table design is also able to handle shock & vibration forces better than a round rail system and can accommodate protective cover plates & waycovers.
Air Bearing Linear Tables create a small air cushion between the table carriage and the table base (guide rail). This provides a non-contact linear bearing system that is rigid, friction free, and cog-free. Using a very accurate guide rail (rectangular or square) can produce excellent flatness & straightness specifications. Typical drive mechanisms for these tables include high accuracy acme screws and linear motors. Incorporating a high accuracy non-contact linear motor drive system with a high accuracy non-contact linear encoder for position feedback creates a very accurate sub-micron or nano-precision positioning table, one that could virtually last forever.
Linear Bearing & Guideway We Provide:
Linear Recirculating Bearings & Rails
We carry both Lintech Profile Rail Linear Recirculating Bearings and SCHNEEBERGER Cross Roller Linear Bearings. Lintech’s family of Profile Rail Recirculating Linear Bearings are cost-effective and offer short-delivery turnaround times. SCHNEEBERGER Cross Roller Linear Bearings are renowned for high accuracy, frictionless motion, high rigidity and high reliability.
Shaft assemblies are provided in single and dual rail versions, with diameters from 0.5 inch (12 mm) to 2.0 inch (50 mm) and lengths to 192 inches (4800 mm). Open and closed linear bearings & pillow blocks are provided in both inch and metric sizes. The single shaft assemblies (SA series), along with linear bearings (SLBO & DLBO), are typically used when the mechanical designers wish to spread apart the SA series and make their own custom carriage assembly.
The single shaft assemblies (SA series), along with linear bearings (SLBO & DLBO), are typically used when the mechanical designers wish to spread apart the SA series and make their own custom carriage assembly. The dual shaft assemblies (TRSA series) and carriage assemblies (TRCA series) are utilized when ease of installation is of essence. The pre-aligned shafts on the TRSA series and the pre-aligned linear bearings on the TRCA series allow the user to quickly mount the components in their system.
Linear Guidance Systems for Unlimited Stroke Lengths. According to the model and loading, balls or rollers are used which are returned internally, load-free, so that continuous motion is ensured. These flat roller & ball recirculating units are characterized by low pulsation/low friction, high load carrying capacity/rigidity, and great precision.
Spine shafts are designed for light load applications where positional accuracy and low cost are desired, and anti-backlash assemblies are available. Linear guideways are compact, value-priced linear guide systems that feature a precision aluminum guide and passive carriage. The integral mounting base allows support over the entire length, if desired. Consider linear rail systems for light load applications requiring minimal frictional drag, low cost and long wear.
Provide manual positioning by a precision lead-screw with anti-backlash nut, and are available in strokes from 25mm to 150mm. Manual positioning is provided by a graduated drum that can be set to zero position. The reading accuracy is 0.01mm. Table parts are constructed with anodized aluminum, MINIRAIL linear guideways and lead screws in corrosion resistant steel.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
SLBC series pillow block with 2 closed self-aligning ball bushing, load capacity from 510 to 6000 lbs, diameters from 0.5 in to 2 in. Works with SL shafting.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBO series pillow block with 2 open self-aligning ball bushing, load capacity from 460 to 4700 lbs, diameters from 0.5 in to 2 in. Works with SL shafting, SA & TRSA shaft assemblies.
DLBC-10 Series