Tedrail offers nearly every size start with the Class B 4-1/4x8 and progresses through the alphabet to the various types of Class G 7x12”, including the K, L and M class adapters according to AAR M-924 specification.
Adapters are available in standard sizes of 6-inch by 11-inch, 6-1/2-inch by 12-inch and 7-inch by 12-inch. Also available are 5-1/2-inch by 10-inch and 6-1/2-inch by 9-inch. Tedrail will deliver all sizes in any quantity. Plain, hardened-crown, and hardened-crown and shoulder adapters are available.
Every batch of delivered adapters will be inspected and gauged according to AAR M-924 specification.
Our adapters not only exceed M924 standards, but also have to pass additional inspections we have developed.
PRODUCTION & MATERIAL
Tedrail could be able to supply the adapter by Forging, Casting Steel, and Casting Iron to meet the requirement of the customer technical drawing. According to AAR M-924, the material could be chose as followings:
Material Code
PM -- Pearlitic Malleable Iron
S-- Castings Steel
F-- Forgings, Carbon Steel
D-- High Strength Cast Iron
Material Code should be casted or forged on the product to the related position according to AAR M-924 specification
Reference Material Specifications are as followings:
ASTM A220 GRADE 50005 Standard Specification for Pearlitic Malleable Iron
ASTM A148 GRADE 80-40 Standard Specification for Steel Castings,High Strength,for Structural Purposes
ASTM A536 GRADE 80-55-06 Standard Specification for Ductile Iron Castings
ASTM A236 GRADE C Specification for Carbon Steel Forgings for Railwa
AAR M-126 GRADE C Forgings, Carbon Steel
Service Features
Tedrail not only supply AAR standard adapter products, but also could manufacture the types of roller bearing adapters according to customer drawing. Material forged or casted, machining and heat treatment is to individual customer specifications with superior quality you're looking for.
Product List Table for Adapters
| CLASS | SIZE(in.) | PRODUCT TYPE | ITEM NO | MATERIAL | PRODUCTION METHOD | HARDNESS(HB) | SPECIFICATION | CUSTOMER AREA |
| C | 5 × 9 | N | 5 x 9N,5 x 9NC, 5 x 9NT,5 x 9NCT | ASTM A220 GRADE 50005 | CASTING | 179-228 | AAR M-924-88 Standard Specification for Journal Roller Bearing Adapters Freight Cars | USA/ CANADA/ MEXICO |
| D | 5 1/2 x10 | N | 5 1/2 x10N, 5 1/2 x10NC, 5 1/2 x10NT, 5 1/2 x10NCT | ASTM A148 GRADE 40-80 | CASTING | ≥179 | ||
| E | 6x11 | N | 6x11N,6x11NC, 6x11NT,6x11NCT | ASTM A536 GRADE 80-55-06 | CASTING | 187-255 superficial hardening 217-255 no superficial hardening | ||
| F | 6 1/2 x12 | N | 6 1/2 x12N, 6 1/2 x12NC, 6 1/2 x12NT, 6 1/2 x12NCT | ASTM A236 GRADE C | FORGING | ≥179 | ||
| G | 7x12 | N | 7x12N,7x12NC, 7x12NT,7x12NCT | AAR M-126 GRAD C | FORGING | ≥179 | ||
| K | 6 1/2x9 | N | 6 1/2x9N, 6 1/2x9NC, 6 1/2x9NT,6 1/2x9NCT |
Note:
N Narrow Type
C The top surface of circular arc quenching
T Thrust stop shoulder surface hardening
CT The top surface of circular arc and Thrust stop shoulder surface hardening
