LOVEJOY 68514445304 Pin and Block U-Joint, Single Joint, 0.6250 Inch Bore, 3.75 Inch Length, Steel

Features:

• Lovejoy 68514445304 D-Type universal joint featuring a block design and a standard pin capable of handling angular misalignments and speeds up to 25 degrees and 1750 rpm, respectively.
• This bored-style, keyway-sized unit easily fits onto the shafts, even without machining, with a 1/4-20 set screw size.
• It can operate at temperatures ranging from -30 deg to 212 deg Fahrenheit.
• This single-joint configuration facilitates high torque capacity and torsional stiffness.
• It offers a consistent speed ratio between the driving and driven shafts, thereby ideal for fans, compressors, printing presses, machine tools and textile machinery that need to transmit modest amounts of force.
• Boots (sold separately) are recommended for wear protection since they are designed to protect the U-Joint by retaining the lubricants and preventing the ingress of contaminants.

Frequently Asked Questions:

Q. What is the difference between keyway and keyless lock systems in hubs?

A. Jaw coupling hubs feature a cutout slot, known as keyways that fit in the shaft keys. These keys promote improved torque & prevents slipping, as well as reduce losses caused by vibrations & backlash (degree of free movement between two rotating, mating parts). However, some applications do not require keys, as keyless jaw coupling hubs use only set screws to transfer torque. Keyless hubs are ideal for situations which remain unaffected even if the shafts slip.

Q. What is the difference between the set screw and clamp screw beam couplings?

A. In the former type, set screws press against the driven shaft to hold the set screw couplings under high torque. Clamp couplings, on the otherhand, come in one- and two-piece designs. In comparison to set screw couplings, they have more holding force without damaging the shaft.