Timken^® Precision Tapered Roller Bearings

Timken’s high-precision tapered roller bearings consist of carefully matched components that offer an added degree of fine-tuning in the bearing setting and adjustment procedure to maximize customer machine productivity. Timken manufactures high-speed designs with a variable preload capability for optimum performance. Timken also manufactures Precision Plus bearings – having an overall radial runout less than a single micron.

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Application: Freight Cars

50%

reduction in torque

$92K

5-year energy savings

257 tons

total reduction in generated carbon

Bearing efficiency increases by 50% (EcoTurn seal vs. HDL seal)¹
Two bearings per axle x 4 axles per freight wagon x 100 freight
wagons per train = 800 bearings per train
Operational Time of Consideration: 5 years²
Customer Location: USA
Loco fuel consumption: 0.028 MWh/Gal³
Electricity Price: $0.13/kWh⁴
CO2 emissions: 10.18 kg CO2 per gallon

Based on torque differential per Bearing of 20 in. lbs
Assuming 5 years average wheel life
Assuming Tier 4 CO line-haul emission factors and large line-haul and passenger conversion factor
Estimation based on U.S. electricity retail price by sector 2024

Calculations
Energy Savings per Bearing: 155 W = 0.155 kW
Lifetime Energy Consumption per Wheel Life: 0.155 kW * 1143h * /a * 800 bearings / train * 5a = 708 MWh
Energy cost Savings per Train Wheel Life: 708 MHh * $130 MwH = $92,000 saved
Emissions Savings per Train Wheel Life: 708 MWh * 10.18 kg CO2/gal * 35.7 gal/MWh * 0.001 ton/kg

Application: Passenger Trains

35%

reduction in torque

$682K

30-year energy savings

1,746 tons

Bearing efficiency increases by 25% (current vs. enhanced)
- Current bearings (A) = 319W each
- Enhanced bearings (B) = 205W each
Two bearings per shaft x 4 shafts per car x 6 cars per vehicle x 10
vehicles per fleet = 480 bearings
Operational Time of Consideration: 30 years
Customer Location: Germany
$0.125 KWh (based on Germany average at the time of testing)
800.3 lbs CO2 per MWh

Source for calculations: EPA

Calculations
Energy Savings per bearing: (PA-PB) 114 W = 0.114 kW
Lifetime Energy Consumption for a Fleet of 10 Vehicles: 0.114 kW * 2930h /a * 48 bearing / vehicle * 10 vehicles * 30a = 4810 MWh
Lifetime Energy Consumption: 4810 MWh * $142/MWh = $682k

Application: Compressor

25%

reduction in torque

$4,691

23,523 lbs.

Bearing efficiency increases by 25% (current vs. enhanced)
- Current bearings = 4.0 N-m torque each, Enhanced Bearings = 3.0 N-m torque each
Two tapered roller bearings supporting the compressor shaft
Compressor driven by an electric motor operating at 3000 RPM
Operational Time of Consideration: 5 years
Customer Location: USA
$0.17 KWh (based on US average)
852.3 lbs CO2 per MWh

Source for calculations: EPA

Calculations
Torque Savings with Enhanced Product = (2 * 4.0 N-m) – (2 * 3.0 N-m) = 2.0 N-m
*Energy Consumption (Q =kNM) =* .105 * 3000 RPM * 2.0 N-m = 630 W = .630 KW
Lifetime Energy Consumption =.630 KW * (24 hrs/ day * 365 days/ yr * 5 years) = 27,594 KW = 27.6 MWh

Application: Pump

10%

reduction in torque

$841

5-year energy savings

3,827 lbs.

total reduction in generated carbon

Bearing efficiency increases by 10% (current vs. enhanced)
- Current bearings = 3.0 N-m torque each, Enhanced Bearings = 2.7 N-m torque each
Two tapered roller bearings supporting the pump shaft
Pump driven by an electric motor operating at 1800 RPM
Operational Time of Consideration: 5 years
Customer Location: USA
$0.17 KWh (based on US average)
852.3 lbs CO2 per MWh

Source for calculations: EPA

Calculations
Torque Savings with Enhanced Product = (2 * 3.0 N-m) – (2 * 2.7 N-m) = 0.6 N-m
*Energy Consumption (Q =kNM) =* .105 * 1800 RPM * 0.6 N-m = 113 W = .113 KW
Lifetime Energy Consumption = .113 KW * (24 hrs/ day * 365 days/ yr * 5 years) = 4,494 KWh = 4.49 MWh

Application: Geardrive

10%

reduction in torque

$5,063

25,398 lbs.

Bearing efficiency increases by 10% (current vs. enhanced)
- Current bearings = 6.6 N-m torque each, Enhanced Bearings = 6.0 N-m torque each
Two tapered roller bearings per shaft x 3 shafts = 6 total bearings
Geardrive driven by an electric motor operating at 1800 RPM
Operational Time of Consideration: 5 years
Customer Location: USA
$0.17 KWh (based on US average)
852.3 lbs CO2 per MWh

Source for calculations: EPA

Calculations
Torque Savings with Enhanced Product = (6 * 6.6 N-m) - (6 * 6.0 N-m) = 3.6 N-m
*Energy Consumption (Q =kNM) =* .105 * 1800 RPM * 3.6 N-m = 680 W = .680 KW
Lifetime Energy Consumption = .680 KW * (24 hrs/day * 365 days/yr * 5 years) = 29,784 KWh = 29.8 MWh

Timken® Precision Tapered Roller Bearings

Resources

Timken Precision Tapered Roller Bearing Catalog

Timken Engineering Tools

Where to Buy

Timken^® Precision Tapered Roller Bearings