1121 Crankshaft and Bearings (N55)

MAIN BEARING JOURNAL GROUND SIZE (GUIDE BEARING JOURNAL NUMBER 7) SPECIFICATIONS

Ground sizes of main bearing journals		Guide bearing journal number 7
Original (identification mark S/1)	mm	64.999... 64.993
Original (identification mark S/2)	mm	64.992... 64.987
Original (identification mark S/3)	mm	64.986... 64.980
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at Center crankshaft journal	mm	0.15

MAIN BEARING JOURNAL GROUND SIZE (MAIN BEARING JOURNAL NUMBER 1) SPECIFICATIONS

Ground sizes of main bearing journals		Main bearing journal number 1
Original (identification mark S/1)	mm	55.989... 55.983
Original (identification mark S/2)	mm	55.982... 55.977
Original (identification mark S/3)	mm	55.976... 55.970
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at Center crankshaft journal	mm	0.15

MAIN BEARING JOURNAL GROUND SIZE (MAIN BEARING JOURNAL NUMBERS 2, 3, 4, 5, 6) SPECIFICATIONS

Ground sizes of main bearing journals		Main bearing journal numbers 2, 3, 4, 5, 6
Original (identification mark S/1)	mm	55.999... 55.993
Original (identification mark S/2)	mm	55.992... 55.987
Original (identification mark S/3)	mm	55.986... 55.980
Crankshaft bearing clearance, radial	mm	0.020... 0.046
Max. permitted runout at Center crankshaft journal	mm	0.15

GRINDING STAGES, CRANKSHAFT GUIDE BEARING SPECIFICATIONS

Grinding stages, crankshaft guide bearing
Original	mm	24.020... 24.053
Stage 1	mm	No machining possible
Size 2	mm	No machining possible
Crankshaft axial play	mm	0.060... 0.250
Friction coefficient of crankshaft	Nm	2 to 2.5

CONROD BEARING JOURNAL GROUND SIZE SPECIFICATIONS

Ground sizes of conrod bearing journals
Identification mark (b)	mm	49.9730... 49.9834
Identification mark (R)	mm	49.9835... 49.9930
Stage 1	mm	No machining possible
Size 2	mm	No machining possible
Radial conrod bearing play	mm	0.025... 0.071