Insert Technically Speaking

INSERT BEARING CRANKSHAFT
& HOUSING BORE SIZES

Model A

Connecting Rods Model A

CRANKSHAFT ROD JOURNAL SIZE STANDARD 1.4995/1.5000
CRANKSHAFT ROD JOURNAL SIZE .001 UNDERSIZE 1.4985/1.4990
CRANKSHAFT ROD JOURNAL SIZE .010 UNDERSIZE 1.4895/1.4900
CRANKSHAFT ROD JOURNAL SIZE .020 UNDERSIZE 1.4795/1.4800
CRANKSHAFT ROD JOURNAL SIZE .030 UNDERSIZE 1.4695/1.4700
CRANKSHAFT ROD JOURNAL SIZE .040 UNDERSIZE 1.4595/1.4600
CRANKSHAFT ROD JOURNAL SIZE .060 UNDERSIZE 1.4395/1.4400
.001 ARE FOR THE BURLINGTON CRANKSHAFT

Main Bearings Model A

CRANKSHAFT MAIN JOURNAL SIZE STANDARD 1.6254/1.6259
CRANKSHAFT MAIN JOURNAL SIZE 002 UNDERSIZE 1.6235/1.6239
CRANKSHAFT MAIN JOURNAL SIZE 010 UNDERSIZE 1.6154/1.6159
CRANKSHAFT MAIN JOURNAL SIZE 020 UNDERSIZE 1.6054/1.6059
CRANKSHAFT MAIN JOURNAL SIZE 030 UNDERSIZE 1.5954/1.5959
CRANKSHAFT MAIN JOURNAL SIZE 040 UNDERSIZE 1.5854/1.5859
.002 ARE FOR BURLINGTON CRANKSHAFT
HOUSING BORE IN BLOCK 1.7705/1.7710

The back of the rear main bearing block and cap is to be counter bored .125 deep and 2.250 diameter
The rear thrust washers are held in place by counter bore and crankshaft. The block thrust washer is to be doweled to block to prevent rotating. Thrust washers are not to be attached or secured as this can cause end loading and abnormal wear.

The front of the rear main bearing block only is counter bored .125 deep and 2.250 diameter
The front thrust washer is held in place by counter bore and crankshaft. The cap not counter bored will prevent the thrust washer from rotating. Again the thrust washer is not secured to block.

We recommend the use of lined bearings with the model a crankshaft. Bearings are in stock at competitive pricing.

CONNECTING ROD SET WITH BEARINGS FOR MODEL A PISTON $550.00
CONNECTING ROD BEARINGS SET OF 8 FOR 4 RODS $50.00
MAIN BEARINGS SET OF 6 FOR 1 BLOCK $85.00
THRUST WASHERS SET OF 3 FOR 1 BLOCK $27.00

Model B

Connecting Rods Model B

CRANKSHAFT ROD JOURNAL SIZE STANDARD 1.8730/1.8740
CRANKSHAFT ROD JOURNAL SIZE .010 UNDERSIZE 1.8630/1.8640
CRANKSHAFT ROD JOURNAL SIZE .020 UNDERSIZE 1.8530/1.8540
CRANKSHAFT ROD JOURNAL SIZE .030 UNDERSIZE 1.8430/1.8440
CRANKSHAFT ROD JOURNAL SIZE .040 UNDERSIZE 1.8330/1.8340
CRANKSHAFT ROD JOURNAL SIZE .060 UNDERSIZE 1.8130/1.8140

Main Bearings Model B

CRANKSHAFT MAIN JOURNAL SIZE STANDARD 1.9990/1.9985
CRANKSHAFT MAIN JOURNAL SIZE 010 UNDERSIZE 1.9890/1.9885
CRANKSHAFT MAIN JOURNAL SIZE 020 UNDERSIZE 1.9790/1.9785
CRANKSHAFT MAIN JOURNAL SIZE 030 UNDERSIZE 1.9690/1.9685
CRANKSHAFT MAIN JOURNAL SIZE 040 UNDERSIZE 1.9590/1.9585
CRANKSHAFT MAIN JOURNAL SIZE 060 UNDERSIZE 1.9390/1.9385
HOUSING BORE IN BLOCK 2.1350/2.1345

The back of the rear main bearing block and cap is to be counter bored .125 deep and 2.875 diameter The rear thrust washers are held in place by counter bore and crankshaft. The block thrust washer is to be doweled to block to prevent rotating. Thrust washers are not to be attached or secured as this can cause end loading and abnormal wear.

The front of the rear main bearing block only is counter bored .125 deep and 2.875 diameter The front thrust washer is held in place by counter bore and crankshaft. The cap not counter bored will prevent the thrust washer from rotating. Again the thrust washer is not secured to block.

We recommend the use of lined bearings with the model b crankshaft. Bearings are in stock at competitive pricing.

CONNECTING ROD SET WITH BEARINGS FOR MODEL A PISTON $700.00
CONNECTING ROD BEARINGS SET OF 8 FOR 4 RODS $ 50.00
MAIN BEARINGS SET OF 6 FOR 1 BLOCK $ 90.00
THRUST WASHERS SET OF 3 FOR 1 BLOCK $ 30.00