Mechanical power transmission technology to replace Universal Joints and PTO couplings

Agricultural Universal Joints like the Mining industry need to be tough, the water, dirt, mud and dust is tough on equipment, harsh working environments plus constant use means premature failure of parts in the drivetrain.

Water , dust, dirt and debris all are present in the farming environment and that takes a toll on equipment, Power take off units, water pumps, tractor powertrain components are all worked from sun up to sun down and so the wear parts in powertrains are the ones that go first

So lets compare what is available, and to date its been one product, the universal joint. The Universal joint or “U joint” has been around for over 115 years, the technology behind it is even older, dating back to Robert Hooke and his Hooke Joint in 1676. The universal joint has a T cross in its center which in modern terms means it has to be constantly lubricated or the T cross or propeller bearings (one at each cross point) will seize up and require replacement. Add to that any angles it is used at means the vibration increases at both speed and angle of use. The typical universal joint in a car requires balancing and its angle of usage is best under 8° the same applies with agricultural equipment.

Something different after 100 years

Twin Spring’s Coupling is different in that it has no centre cross to allow it flex, that is handled by its dual spring design, add to that it has no internal bearings means it can run in hostile farm environments without constant maintenance. What this means to you is more flex no maintenance.

Not designed to work in harsh environments, the debris enters the couplings, seals of bearings leading to failure due to wear of the many internal components. This failure costs money, even with a maintenance program in place.

Lubricated and encased during the manufacturing process means those environmental contaminants cannot effect the Twin Spring Coupling.

No maintenance saves farmers time and that means money, as equipment needing to be repaired or maintained costs especially in planting and harvesting season

Attach Power Take Off’s (PTO) and work without the issue of being only able to use it within a few degrees or it failing.


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, W2300 German Style Walterscheid 2300 Series,  W2200 Series  German Style Waltersheid 2200 Series,  Italian style Bondioli & Pavesi 3 Series, Italian style Bondioli & Pavesi 4 Series, Italian style Bondioli & Pavesi 5 Series, W2400 Series German Style Walterscheid 2400 Series

Neapco – 1-1001 WALTERSCHEID SERIES 2100, 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

Weasler – 6 (200-0600), 12 (200-1200) 1800 (200-1875) 14 (200-1400) (200-8474) (200-8730)(200-8261)

Bondioli – S1, S2, S3, S4, S5, S6 series, G1, G2, G3, G4, G5 series

Walterscheid – G2100, G2200 ,G2300([email protected]), P300 ([email protected]), , W300E, W200E, W100E

Lovejoy – D3, D4, LOJ6, DD3, DD4 series,  D5, NB6, DD5, DD6, LOJ8 series, D6, D7, NB8, DD7, LOJ10 series D8, NB10, DD8 series

Boston Gear –  J/JS universal joints J200, J175, J150, JS200, JS250, JS300, UJAS/UJNL

SIT – GU series

GMB –  GUA series

PTO sizing table

540 RPM
1000 RPM
1′ – 1 3/8″ (24.5mm- 35mm) 6 teeth
Series 1-5
Series 1-5
1′- 1 3/8″ Keyway
Series 1-5
Series 1-5 
​1′ – 1 3/8″ (25.4mm-35mm)  21 teeth
Series 2-5
Series 2-5