Adapter for 7x12 railway bearing

Adapter is one of the important parts of railway locomotive and vehicles. The adapter’s function is to connect the wheel set and side frame on the bogie, to transform the rolling of the wheels on the track through the side frame into the movement of the car body, and to transfer the load of the car body to the bearing and axles, which plays an important role in preventing eccentric load of the axles.

Most of the adapters for three-piece truck bogies are made of cast steel Class C material, designed according to AAR M 201. The manufacturing process complies with AAR M-924. Due to optimization design, Tieke could provide suitable adapters compatible with different bearing sizes as below table.

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Introduction:

Model: Adapter for 7x12 railway bearing

About adapter

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

Table listsall Tables

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	AAR M-126 GRAD C	FORGING	≥179