I kept reading about the H-Series Clevite bearings, but what are they??? How was the H-Series different from the others and just how many different Series bearings are there??? Well Mahle/Clevite has a wealth of information about their bearings and the differences between the P-Series, Deltawall P-Series, H-Series, V-Series and M-Series bearings.
They also discuss, something we are all concerned about...... "How much clearance do your bearings need?" and "Pointers for selecting high performance rod and main bearing"
This link will get you to the main index page. http://www.mahleclevite.com/publications.asp
- To get to the publication I'm speaking about click on "Catalogs"
- Then page down until you find
2007-2008 Clevite Engine Bearing Performance Catalog
(EB-40-07)
Published: 22 January 2008
and click on it, it's the 14th document:
- One more step to get the document, click on
[PDF, 3MB]
If you just want to go straight to the document, then click on this link, but you will miss the chance of seeing all the info they provide!
http://www.mahleclevite.com/publications/EB-40-07.pdf
Just to wet your appetite, here is the section about H-Series Bearings, but it won't be as good without the pictures.
H-series bearings
These bearings are identified by a letter H in the part number suffix. Part numbering is based
on the same core number as the standard passenger car parts for the same application.
These bearings were developed primarily for use in NASCAR type racing, but are suitable for all
types of competition engines. H series bearings have a medium level of
eccentricity, high crush, and rod bearings have a hardened steel back and thin overlay. These
bearings also have enlarged chamfers for greater crankshaft fillet clearance and are made without
flash plating for better seating. Bearings with .001†extra clearance are available for standard
size shafts and carry the suffix HX†(X = extra clearance). Rod bearings are available with or
without dowel holes (HD = with, H = without), main bearings are available with standard 180
degrees upper half grooving and with full 360 degrees grooving (H = 180 degrees, HG 360
degrees). Use H series bearings with crankshafts that have oversize fillets and where engines run
in the medium to high RPM range. H series bearings should be used if contact patterns
obtained with P series parts are too narrow. Contact patterns should ideally cover 2/3 to
3/4 of the bearing surface. See accompanying contact pattern diagrams. If you aren’t sure
which type of performance bearing to start with, the H series bearing will be your best choice.
Hope this helps someone, I know it did for me!!!
They also discuss, something we are all concerned about...... "How much clearance do your bearings need?" and "Pointers for selecting high performance rod and main bearing"
This link will get you to the main index page. http://www.mahleclevite.com/publications.asp
- To get to the publication I'm speaking about click on "Catalogs"
- Then page down until you find
2007-2008 Clevite Engine Bearing Performance Catalog
(EB-40-07)
Published: 22 January 2008
and click on it, it's the 14th document:
- One more step to get the document, click on
If you just want to go straight to the document, then click on this link, but you will miss the chance of seeing all the info they provide!
http://www.mahleclevite.com/publications/EB-40-07.pdf
Just to wet your appetite, here is the section about H-Series Bearings, but it won't be as good without the pictures.
H-series bearings
These bearings are identified by a letter H in the part number suffix. Part numbering is based
on the same core number as the standard passenger car parts for the same application.
These bearings were developed primarily for use in NASCAR type racing, but are suitable for all
types of competition engines. H series bearings have a medium level of
eccentricity, high crush, and rod bearings have a hardened steel back and thin overlay. These
bearings also have enlarged chamfers for greater crankshaft fillet clearance and are made without
flash plating for better seating. Bearings with .001†extra clearance are available for standard
size shafts and carry the suffix HX†(X = extra clearance). Rod bearings are available with or
without dowel holes (HD = with, H = without), main bearings are available with standard 180
degrees upper half grooving and with full 360 degrees grooving (H = 180 degrees, HG 360
degrees). Use H series bearings with crankshafts that have oversize fillets and where engines run
in the medium to high RPM range. H series bearings should be used if contact patterns
obtained with P series parts are too narrow. Contact patterns should ideally cover 2/3 to
3/4 of the bearing surface. See accompanying contact pattern diagrams. If you aren’t sure
which type of performance bearing to start with, the H series bearing will be your best choice.
Hope this helps someone, I know it did for me!!!
