Standard Steel

Wheels


STANDARD AAR WHEEL TYPES - WIDE FLANGE CONTOUR –
FOR FREIGHT CAR SERVICE - CARBON STEEL (M-107/M-208)

AAR
Type

J-33

M-33

P-33

H-36

J-36

K-36

B-38

C-38

Status
Date

STND
1956

STND
1961

STND
1984

STND
1962

STND
1962

STND
1962

STND
1964

STND
1964

Effective
Date

1968

1968

1985

1972

1968

1968

1973

1968

Tread
Type

1-W

2-W

M-W

1-W

2-W

M-W

1-W

2-W

Intended
Axle
Class

5½ x 10
6 x 11

5½ x 10
6 x 11

5½ x 10
6 x 11
6½ x 12
7 x 12

6½ x 12
6½ x 9

6½ x 12
6½ x 9

6½ x 12
6½ x 9

7 x 12

7 x 12

Max. Cap.
Per Wheel
LBS.

27,500

27,500

32,875

35,750

35,750

35,750

39,375

39,375


DIMENSION AND TOLERANCES - ALL ENTRIES IN INCHES, EXCEPT TAPES

D

33 + 14
TAPES
(5% -5)

33 + 14
TAPES
(5% -5)

33 + 14
TAPES
(5% -5)

36 + 14
TAPES
(5% -5)

36 + 14
TAPES
(5% -5)

36 + 14
TAPES
(5% -5)

38 + 14
TAPES
(5% -5)

38 + 14
TAPES
(5% -5)

G (MIN)

1 ¼

2

2 ½

1 ½

2

2 ½

1 ½

2

Rim Width

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

5 23/32 ± ⅛

N (MIN)

¾

¾

¾

¾

O1

         +1
10 ⅝ -0

        +1
10 ⅝ -0

            +1
11 ⅞  -0

            +1
11 ⅛  -0

           +1
11 ⅛  -0

            +1
11 ⅛  -0

         +1
12 ⅛ -0

        +1
12 ⅛ -0

O2

         +1
10 ⅝ -0

         +1
10 ⅝ -0

            +1
11 ⅞  -0

            +1
11 ⅛  -0

           +1
11 ⅛  -0

            +1
11 ⅛  -0

         +1
12 ⅛ -0

         +1
12 ⅛ -0

Max Finish
Bore

8 ⅜

8 ⅜

9 ⅝

8 ⅞

8 ⅞

8 ⅞

9 ⅝

9 ⅝

Min Hub
Wall

1 ⅛

1 ⅛

1 ⅛

1 ⅛

1 ⅛

1 ⅛

1 ¼

1 ¼

R1

7 ± ¼

7 ± ¼

7 ± ¼

7 ± ¼

7 ± ¼

7 ± ¼

7 ± ¼

7 ± ¼

R2

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

2 ½ ± ⅛

The key for these meaurements is available here.

Locomotive Wheels

STANDARD AAR WHEEL TYPES - NARROW FLANGE CONTOUR - FOR DIESEL LOCOMOTIVE

AAR
Type

E-40

A-41

A-43

D-42

E-42

Status
Date

STND
1982

STND
1997

STND
1997

STND
1997

STND
1997

Effective
Date

3/1/83

1997

1997

1997

1997

Tread
Type

M-W*

M-W*

M-W*

M-W

M-W

Intended
Service

Diesel
Loco.

Diesel
Loco.

Diesel
Loco.

Diesel
Loco.

Diesel
Loco.

DIMENSIONS AND TOLERANCES - ALL ENTRIES IN INCHES, EXCEPT TAPES

D

40"
Tapes
+14
-0

41"
Tapes
+14
-0

43"
Tapes
+14
-0

42"
Tapes
+14
-0

42"
Tapes
+14
-0

G (min)

3

3

Rim Width

5 23/32 ± ⅛
(5 ½ ± ⅛ alternate)

5 23/32 ± ⅛
(5 ½ ± ⅛ alternate)

5 23/32 ± ⅛
(5 ½ ± ⅛ alternate)

5 23/32 ± ⅛
(5 ½ ± ⅛ alternate)

5 23/32 ± ⅛
(5 ½ ± ⅛ alternate)

N (min)

1

1

1

1

1

O1

12 ½ ± ⅛

12 ½ ± ⅛

12 ½ ± ⅛

12 ½ ± ⅛

12 ½ ± ⅛

O2

13 ¼ ± ⅛

13 ¼ ± ⅛

13 ¼ ± ⅛

13 ¼ ± ⅛

13 ¼ ± ⅛

P

6 ½ ± ⅛

6 ½ ± ⅛

6 ½ ± ⅛

6 ½ ± ⅛

6 ½ ± ⅛

R1

4 13/16 ± ⅛

4 13/16 ± ⅛

4 13/16 ± ⅛

4 13/16 ± ⅛

4 13/16 ± ⅛

R2

1 11/16 f

1 11/16 f

1 11/16 f

1 11/16 f

1 11/16 f

Max Finish Bore

9 15/16

9 15/16

9 15/16

9 15/16

9 15/16

Min Hub
Wall

**
1 ⅛

1 ⅛

1 ⅛

1 ⅛

1 ⅛

Note: Where dimension R2 is marked "f", extra stock of 1/16" to 3/16" over specified dimension may be left for machining of each finished surface or wheel may be furnished finished to exact dimension shown.  Hub length tolerance is based on
finished dimension.

*  Reference Groove Required - See AAR RP-619
** Hub wall thickness may be reduced as necessary for application of roller bearing water guard.

Passenger Wheels

Standard Steel currently manufactures a variety of types and sizes wheels for the passenger/transit markets. Full specifications and quotes are available by contacting a sales representative.