L S Starrett BEARING COMPANY

Drill Rod Bearings

To provide a longer stroker crank that has more strength than the stock VW forging or any other aftermarket forged crankshaft, the 411 center main journal is required. For that reason all of the "Berg" forged cranks are made with the 411 center main to provide a stronger cross sectional area at the center journal. To maintain proper case strength, I use a special adapter bearing (GB 157) that fits the stock case and this larger crankshaft main journal. It is a steel backed bearing, as was the one it replaced, leaving the regular (steel back) split #2 main bearing as an extra. Gary, has been installing these split #2 bearings in the #3 location for years on all engines that use a 411 center main bearing crankshaft, having the round #3 bearing as the leftover. This requires adding a dowel hole in the other half of most cases at the #3 location so it will accept the dowel. A few cases have this dowel hole from the factory, but it is likely you will need to add the hole. Gary made a drill fixture by drilling through the pin hole in an old #2 split bearing, installing that bearing in the case and drilling a pin hole about a 1/4" deep into the case at the #3 location.
Extremely simple! This provides much stronger case and crankshaft support when using the split steel backed bearings in both #2 and #3 locations. Furthermore, it is no longer necessary to remove or replace the cam/distributor drive gears from the crankshaft when working on the engine or changing main bearings. See LA CASE030 for adding dowel hole.

Precision Brand 28024 Drill Rod Bearings
3/4- 16 in
Unlubricated
Precision Brand 28023 Drill Rod Bearings
193 mm
2.5 mm
Precision Brand 28020 Drill Rod Bearings
Side Mount
1430 kgf
Precision Brand 28085 Drill Rod Bearings
Standard
27.9
Precision Brand 28084 Drill Rod Bearings
SAE 660 (C932&#
1-3/8 in
Precision Brand 28083 Drill Rod Bearings
13/16 in
5600 lb
Precision Brand 28080 Drill Rod Bearings
3150 lbf
3-13/16 in
Precision Brand 28078 Drill Rod Bearings
1.7500 in
7 °
Precision Brand 28076 Drill Rod Bearings
1.3750 in
3.6250 in
Precision Brand 18021 Drill Rod Bearings
68mm
0.13 KGS
Precision Brand 18086 Drill Rod Bearings
0.998 lb
29607-4954
Precision Brand 28158 Drill Rod Bearings
653
555
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