Mechanical flexible coupling technology to replace Universal Joints and Lovejoy couplings
The Universal Joint or U joint has been around longer than the Automotive industry, whether Car, SUV, Truck or Bus are all affected by the coupling technology after the gearbox and steering.
Clarence Spicer patented the U Joint back in 1904, from designs of the inventor Robert Hooke who first documented the Universal joint or Hooke Joint in 1676. As the oldest in the market, the Spicer U joints have been the industry standard for 100+ years.
Latest technology engines, fuel management systems, multi speed gearboxes are all at the mercy of the couplings in the powertrain, in the steering and the wheels. The Universal joint is the oldest technology on any modern automobile.
Universal joints are made up of three pieces, a pair of input and output shaft connectors or “yokes” and a center universal joint sometimes also called a cross joint.
These components have their own failure points. The cross has to be constantly lubricated or the bearings at each of the 4 connection points to the yokes, can seize and fail. These same bearings cannot be run at large angles of misalignment or the bearings will wear the race out and again this leads to bearing failure. Bearing because they need to keep the internal ball bearing moving, any outside contaminants like water dust etc will cause the balls to seize and this leads to bearing failure and therefore replacement.
The yokes while large on their exterior, where they attached to the cross are alot smaller and this is an area where failure due to cracking, either by external damage or using a seized universal joint. This failure means the yoke needs to be replaced. All of this costs money, both for product replacement but also the cost of labor and machinery down time.
A standard universal joint cannot run over 8° without causing significant vibration, effecting either the handling and ride of the car to actual damage to the vehicle. All driveshafts have to be balanced to take into account this movement of 8°, otherwise damage to gearbox, the axle and its bearings will occur.
The number of moving parts means anything happens to one component will mean a failure of the whole part
Constantly being re lubricated and covered in a protective parts is required otherwise water, dirt and debris will mean premature wear and failure
Twin Spring offers one solution to both products, a set of counter wound springs means zero moving parts and being lubricated and encased in vulcanised neoprene means no water, dust or debris can enter the joint to cause failure
Being the first coupling that can take full thrust means improved efficiency, as no losses are recorded.
Is not subject to vibration as the surfaces are constantly in contact.
It can be made in any size/torque configuration, so sized up or down to suit specifications.
Replace U joints in steering applications, smaller maintenance free and works in most steering boxes. Drivetrain and axles are also another area to replace u joints with Twin Spring Couplings. A 1 piece design replaces the 3 of a universal joint, meaning less chance of failure.
Spicer – 1000, 1140, 1240, 1310 series
Moog -1500 PTO replaces Domestic Standard Series 1000, 1800 series @1000RPM Replaces Domestic Standard series 35, 1300 series replaces Domestic Standard series 14, 1200 series replaces Domestic Standard series 12
Neapco – 1-1001 ASAE Cat 1 L600, 1-1475 ASAE Cat 2 1200, 1-1275, ASAE Cat 3 1800,1-1875 2000, 1-2075, Metric Cat 3 Series 4,2300 1-10421,1-0321, 1-0221,1-0170
Lovejoy – D3, D4, LOJ6, DD3, DD4 series, D5, NB6, DD5, DD6, LOJ8 series, D6, D7, NB8, DD7, LOJ10 series D8, NB10, DD8 series Timken
Belden – UJ-HD UJ-HS series UJ-NB MIL-DTL-6193D MS20270 (Military specs)
Boston Gear – J/JS universal joints J200, J175, J150, JS200, JS250, JS300, UJAS/UJNL
SIT – GU series
GMB – GU series, ST1XXXX steering series, MC Series
Altra Motion Control