Ingersoll Rand St900 Turbine Air Starter

Ingersoll Rand ST950BP03R31 turbine air starter – ST900, 50% arc, SAE 3 flange, 12T pinion DP 6/8, right-hand rotation

Ingersoll Rand ST950BP03R31 is an ST900 series pre-engaged turbine air starter for starting diesel and gas engines in marine, power generation, oil & gas and off-highway applications. Power up to 30 hp (22 kW) and breakaway torque 217 Nm at 6.2 bar.

Standard orientation. The orientation only defines how the starter sits on the engine (inlet, exhaust and drive housing positions). The starter itself is the same as other ST950BP03R31 variants – choose the one that fits your engine installation, or ask us.

  • turbine
  • 50% arc
  • gear ratio B
  • pre-engaged
  • SAE 3 flange
  • 12-tooth pinion, DP 6/8
  • right-hand rotation
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Other versions in the ST900 seriesCompare all in a table →
ModelST950 · 50% arcST999 · 99% arc
Gear ratioBC
PinionL26 · 11 T · DP 6/8L32 · 12 T · DP 6/8R25 · 11 T · DP 6/8R31 · 12 T · DP 6/8R51 · 15 T · DP 6/8
RotationLeft-handRight-hand
ExhaustElbowStraight (S)
Orientation0I3AStandard
Orientation diagram
Rear view – inlet and exhaustRear view – inlet and exhaust0123Flange view – drive housingFlange view – drive housingABCDEFGHIJKLMNOP

Standard orientation – positions are confirmed at order to suit your engine.

Positions per the Ingersoll Rand installation manual: inlet and exhaust 4 × 90°, drive housing 16 × 22.5°. The drive housing letter shows the position of the control ports (reference hole on inertia models). Always check against your engine installation drawing.

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SKU: ST950BP03R31 Category:

Features

Fits engines such as: Waukesha 5108G (SI/L), 5115GL, 5790G (SI/L), 6LAT25GL; Caterpillar 3512, 3516, G3512, G3516; Dresser-Rand 10SVG, 10TVR, 10TVS, 6SVG; Superior 12G-825, 12-GTL (B), 12-SGT (B), 16G-825; ALCO 244, 251 and others.

Based on the Ingersoll Rand air starter selection list. Engine manufacturer names are used to describe compatibility only. Before ordering, check the flange, pinion and rotation – send us your engine model and we will help you choose.

Professional tools in Sweden and the Nordics.

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ST900 Series Turbine Air Starters (16–200 L Engines)