Lovejoy D-5B Block and pin universal joint replacement – the TSC150 1/2″.
TSC150 1/2″ jaw coupling replacement for mechanical power transmission couplings. Replace your Lovejoy D-5B with a maintenance free, flexible shaft coupling alternative.
Couplings in the industrial sector traditionally are broken into two sectors, the beam/bellows or elastomeric couplings that can only run at angles of 1° or less otherwise they wear out, as they cannot physically flex beyond that, normally they run at 1/2°.
The Lovejoy D-5B is a block and pin universal joint and belongs to the other group.
Lovejoy D-5B Universal Joint.
The other are universal joints which can normally only run at 8° otherwise prematurely wearing the bearings within the propeller shaft of the universal joint, the bearing will become loose and that creates vibration and with continual wear the ball bearings will fail.
The Lovejoy D-5B is a block and pin universal joint, this limits the speed it can run at to 1750 RPM, and flex to 25° otherwise the speed results in a increased generation of heat which leads to the block and pin seizing and results in the Lovejoy D-5B needing to be replaced.
There are repair kits available but they are priced at 50% of the original purchase price so it adds to the cost of using one of these couplings.
Twin Spring Coupling can run up to 25° without needing to be lubrication, and at low angles of misalignment and comparable high speeds to traditional industrial couplings.
Bearings being very precise instruments also need to be contained to ensure infiltration by any foreign contaminants, as things like water, mud, dust or dirt will again cause the ball bearings to seize in their tracks and this means bearing failure.
Being used at high speed for long periods of time produces heat and that can cause the ball bearings to seize inside the bearings leading to premature failure.
The other downside to a universal joint are the yokes which the bearings are contained in, the coupling piece of the yokes are quite tough but the section that contains the bearings not so much as they have to hold the bearings.
This is a weak point as the bearings are usually less than 2″ across so the machining to contain the bearings is a lot smaller than the rest of the yoke, which means the likely of them cracking is that much higher.
Cracking leads to catastrophic failure and replacement of both the yoke and universal joint is assured. This makes it an expensive repair as with the price of the yoke and universal joint, it is usually cheaper just to replace everything, both yokes and the propeller joint.
Twin Spring Coupling is different it replaces the entire U joint, yokes, propeller/cross bearings everything, with a simple one piece design.
By being a one piece design also means Twin Spring Coupling wont break like the yokes do in traditional Lovejoy D-5B joints.
Our coupling is available in all the standard industry splines for easy replacement or retrofit for OEM.
Boston Gear – FC25 XFCBB Bronze, FC30 XFCA Poly, FC38 Rubber XFCR, J150, JS175 JS200, UJAS 12-12, UJNL 16-16.
Curtis – CJ644B , CJ645B.
SKF – FRC 150, SKF Flex 90-100, UJMA25.
TB Woods – Dura Flex WE10, L Jaw L090/L100/AL100/SS100/L110/AL110/SS110, L150/AL150/SS150 G Flex grid coupling 1000T10-1030.
Lovejoy – L-090, L-099, L-100, C-226 C-276 (SOX), CJ 38/45 (92A) 28/38 (98/95A) 28/38 (64D), DD-4 Uni joint D-5,NB-6, DD-5, DD-6, LOJ-8, Uniflex U100,U125, U137, Saga S13, S Flex Size 6-9, Delta Flex 40/40HT.
Rexnord – Omega Orange 10-15, Omega HDY 5-10, Viva 130.
Belden – UJ-HD1250, UJ- HS1000, UJ-HS1250, UJ-NB1000x500
Falk – Wrapflex 10R.
Guardian Couplings – Guardex M-48, Spec I32, LJW100-LJW190.
SIT – SIT – GU5P, GU5E, GU5H, Trasco ES 55 red and green, 65 yellow,
KTR – Rotex AL-H 28/38 (92,98, 64) 38-92A, GJL 38 (92A).
For more information on the TSC150 go to https://twinspringcoupling.com/coupling-products/tsc-150/.