GrantGunderson
Hot Rolled
- Joined
- Jun 4, 2021
- Location
- Bellingham, WA
During the course of my 10EE complete teardown, I have complied a full list of all of the bearings in my 1944 Round Dial and from what I have researched are compatible modern replacements. It will be interesting to compile a list of the bearings in other years, and a list of what people have successfully used as replacements. If you have any bearings different than what is here, please post, and I will modify the spread sheet.
Excel Sheet of 10EE Bearings / parts.
Here is a link to a 1944 New Departure Catalog that Cal sent me.
In my research, I hand found that New Departure specifically marked any Bearings destined for precision use, such as in a spindle with the amount of Eccentricity, and the high spot. I believe these are the "Check marks" you see on some of the bearings, as well as the ##XX numbers as well. These all appear to be hand etched on the bearings.
ND Numbering System:
Reading Right to Left:
First two digits is the bore size
Third digit is Series, 2 = Light, 3 = Medium, 4 = Heavy, 5 = Non Loading groove light, 6 = Non Loading Groove heavy.
Fourth Digit, 1 = single row maximum capacity, 3 = Single Row non loading grove, 5 = double row, 7 = shielded, 8 = ND Seal Type
Here are a few of New Departure's bearing prefixes and subfixes.
A = Rust prevention compound
BA = Single Row Angular Contact, Singly Mounted
BC= Single Row Radial, Non-Loading Grove Assembly
BD=Double Row Angular Contact
BL=Single Row Radial, Loading Groove Assembly
BM = Single Row Separable Bearings (Magneto)
BIC = Single Row Radial, Non-Loading Groove to inch sizes.
C= sheilds on one side. or High melting point grease
D= Duplex pair
DB = Duplex front to Back
DF = Duplex Face to Face
DT= Duplex Thrust
DU=Duplex Universal
F = Single Row Angular Contact, Duplex
G = Snap Ring
L = Loose or can be Standard preload
M = ?
N = Flanged type = Modern equivalent is NR
P = Sheilds on one side
PP = Shields on both sides
Q= non metallic seperator
R series = inch series
S= Special
T= Universal Ground or Can be tighter fit. or can be Heavy preload
V= ?
W = ?
X= medium preload or standard Internal fit-up
Y= low speed noise tested
20 series = Angular contact light series (most companies is a 7 series)
30 series = Angular contact Heavy series.
4XXXX or 4XXX = Snap Ring
47XXXX or 47XXX = Snap Ring and Shield
7XXX or 7XXX = Shielded on one side.
77XXX or 77XXXX = Shielded on both sides.
8XXX = Sheilded standard width
87XXX = Shielded and Sealed wider than standard bearing
88XXX = Shielded, sealed and lubricated for (life)
WC-8XXX = Outer Ring width is equal to over width of standard 8XXX series
WC-8XXX = Shielded with wider center race.
WC - series was designed to be mounted into softer metals
1,3,5 prefix is ABEC
Excel Sheet of 10EE Bearings / parts.
Here is a link to a 1944 New Departure Catalog that Cal sent me.
In my research, I hand found that New Departure specifically marked any Bearings destined for precision use, such as in a spindle with the amount of Eccentricity, and the high spot. I believe these are the "Check marks" you see on some of the bearings, as well as the ##XX numbers as well. These all appear to be hand etched on the bearings.
ND Numbering System:
Reading Right to Left:
First two digits is the bore size
Third digit is Series, 2 = Light, 3 = Medium, 4 = Heavy, 5 = Non Loading groove light, 6 = Non Loading Groove heavy.
Fourth Digit, 1 = single row maximum capacity, 3 = Single Row non loading grove, 5 = double row, 7 = shielded, 8 = ND Seal Type
Here are a few of New Departure's bearing prefixes and subfixes.
A = Rust prevention compound
BA = Single Row Angular Contact, Singly Mounted
BC= Single Row Radial, Non-Loading Grove Assembly
BD=Double Row Angular Contact
BL=Single Row Radial, Loading Groove Assembly
BM = Single Row Separable Bearings (Magneto)
BIC = Single Row Radial, Non-Loading Groove to inch sizes.
C= sheilds on one side. or High melting point grease
D= Duplex pair
DB = Duplex front to Back
DF = Duplex Face to Face
DT= Duplex Thrust
DU=Duplex Universal
F = Single Row Angular Contact, Duplex
G = Snap Ring
L = Loose or can be Standard preload
M = ?
N = Flanged type = Modern equivalent is NR
P = Sheilds on one side
PP = Shields on both sides
Q= non metallic seperator
R series = inch series
S= Special
T= Universal Ground or Can be tighter fit. or can be Heavy preload
V= ?
W = ?
X= medium preload or standard Internal fit-up
Y= low speed noise tested
20 series = Angular contact light series (most companies is a 7 series)
30 series = Angular contact Heavy series.
4XXXX or 4XXX = Snap Ring
47XXXX or 47XXX = Snap Ring and Shield
7XXX or 7XXX = Shielded on one side.
77XXX or 77XXXX = Shielded on both sides.
8XXX = Sheilded standard width
87XXX = Shielded and Sealed wider than standard bearing
88XXX = Shielded, sealed and lubricated for (life)
WC-8XXX = Outer Ring width is equal to over width of standard 8XXX series
WC-8XXX = Shielded with wider center race.
WC - series was designed to be mounted into softer metals
1,3,5 prefix is ABEC
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