Ruland manufactures shaft collars in multiple styles to fit shafts ranging from 1/8" to 6" in the inch series and 3mm to 150mm in the metric series. Ruland shaft collars are available in a variety of materials and finishes including: 303 & 316 stainless steel, black oxide and yellow zinc plated carbon steel, high-strength aluminum, and engineered plastic. Each shaft collar is stamped with the Ruland name and bore size for easy identification.
Extra steps are taken in the manufacture of Ruland shaft collars to provide important performance benefits. For example, they are single point faced (indicated by the circular groove on the face) during the boring operation to insure perpendicularity of the face to the bore. This results in a face runout of TIR ≤ .002" (.05mm) on standard shaft collars with even tighter tolerances on bearing lock-nuts and special designs. Perpendicularity is important for alignment when a shaft collar is used as a load-bearing face, mechanical stop, or for mounting components such as gears or bearings.
One-piece shaft collars wrap around the shaft for even distribution of clamping forces. This results in a tight fit and greater holding power, without the shaft damage caused by set screws. Clamp collars are easy to remove, indefinitely adjustable, and work well on virtually any shaft. Ruland uses carefully selected materials and proprietary processes on its one-piece collars to ensure the clamping gap remains open for simpler and more precise adjustment, installation and fit.
Two-piece shaft collars offer the same benefits as one-piece shaft collars with additional versatility and convenience. The split design is easily installed and disassembled, reducing labor and downtime when adjustment, removal, or replacement is necessary. The two-piece shaft collar uses the full seating torque of its forged screws to apply a uniform distribution of forces around the shaft's circumference. These clamping forces provide the collar with a holding power superior to one-piece and set screw shaft collars. Ruland keeps both halves of the split collar together throughout the manufacturing process to assure a perfect match for proper fit, alignment, and holding power. This process also makes the two-piece collar more adaptable to shafts which vary a small amount from nominal size.
Threaded shaft collars and bearing lock-nuts share the same quality and benefits of their smooth bore counterparts, while providing additional features. Threaded collars provide axial holding power which is superior to smooth bore collars, while offering easier installation and adjustment than solid ring locking devices. A diverse list of thread sizes and pitches, including locknut threads, are offered. Ruland double taps each threaded collar and bearing lock nut to insure precise and burr-free threads to allow for easy installation and removal, proper fit, and extended shaft life.
Set screw shaft collars are the most effective when used on a shaft made of a material which is softer than the set screw. Ruland set collars are furnished exclusively with forged socket set screws for greater torque capacity and improved holding power. Forging of the stainless steel set screws has the additional benefit of work hardening, which results in stainless steel with elevated hardness and performance.
International series shaft collars are offered in one and two-piece styles and feature inch bores with metric outer diameters, widths and DIN 12.9 socket headed cap screws. The use of metric screws with inch bores is especially useful when either retrofitting or designing equipment with inch shafts for worldwide use. The International series shaft collar is available in bore sizes from ¼” to 3” with outside diameters from 18mm to 108mm.
Quick-clamping shaft collars are ideal for light duty or low-rpm applications that require frequent setup changes or adjustments. The handle sits flush with the outside diameter allowing the shaft collar to be precisely adjusted by hand without the need for tools. The quick-clamp shaft collar is made from aluminum and has a black anodized finish with stainless steel hardware. They do not mar the shaft.
Thin line shaft collars are designed for applications with space and weight restrictions in industries such as packaging, printing, medical, and food, and are particularly suitable for split hub componentry such as encoders. They function as clamps, positioners, guides, spacers, and stops in a smaller profile than traditional shaft collars. Two-piece styles have a balanced design for higher RPM applications. Most bore sizes are available with different outer diameter and width dimensions and screw sizes allowing the user to match space limitations and holding power with their application requirements.
Hygienic clamping assemblies are ideal for high pressure washdown applications found in the food processing, packaging, agriculture, and medical industries. The patent pending design contains a 303 stainless steel shaft collar, enclosed with a male and female shroud made from FDA compliant materials, and three O-rings with NSF compliant lubrication. Watertight seals on the shroud help to prevent particulate buildup which can lead to bacteria growth.
For additional information, read the articles "Getting a Hold on Shaft Collars" and "Improve Efficiency with Quick Clamping Shaft Collars".