Self Steering Modul Drum Brake Axle Type B

The Self Steering Modul Drum Brake Axle Type B is one of the specialized products in the heavy transport fleet sector, designed with advanced engineering and high load capacity. This axle is manufactured under codes 81500420001 and 81500420003 and is capable of carrying an axle load between 9,000 and 12,000 kilograms.

Equipped with a Ø300 drum brake system, it ensures safe and reliable stopping power. Its steerable design increases maneuverability, improves control in narrow roads, and enhances overall vehicle handling. The LBM distances are 1210 and 1250 mm, while BM is 750 and 800 mm. FM is 1945 and 1985 mm, and the kingpin length (SP) is 690 mm.

This axle is designed for standard 10-bolt wheels with specifications 175/225 and M22×1.5 bolts, and it is compatible with tire sizes 235/75 R 17.5 and 245/70 R 17.5.

محور 255

Axle Technical Data Table

Product code Axle Load Brake system LBM BM FM SP OH/K Tyres Recommended
81500420001 9000kg-12000KG Drum Brake Ø300 1210 690 750 1945 175/225
10 Bolts M22 x 1.5		 235/75 R 17.5
245/70 R 17.5
81500420003 1250 800 1985

Suspension System Specifications

E C F D G Empty without air X(mm) Loaded without air X(mm) Air Spring Bracket(mm) ST FH
255 130 35 83 87 285 270 - 268 365
315 300 50 395

Axle Technical Data Table

Product code
81500420001
81500420003
Axle Load
9000kg-12000KG
-
Brake system
Drum Brake Ø300
-
LBM
1210
1250
BM
690
-
FM
750
800
SP
1945
1985
OH/K
175/22510 Bolts M22 x 1.5
-
Tyres Recommended
235/75 R 17.5
245/70 R17.5

Suspension System Specifications

E
255
255
C
130
130
F
35
35
D
83
83
G
87
87
Empty without air X
140
180
Loaded without air X
130
165
Air Spring Bracket
-
50
ST
268
268
FH
240
270
محور کاسه ای فنری فرمان پذیر 255

In the suspension system section, the steerable spring drum axle is designed with an E distance of 140 mm, an F value of 130 mm, and reinforcement components with thickness ranging from 35 to 87 mm.

The precise positioning of the air spring bracket, along with detailed calculations for both unloaded and air-sprung loaded conditions, facilitates easier installation, reduces component wear, and extends the axle’s service life.

Combined with its steerable structure, these features make the product a suitable option for heavy vehicles operating in urban and intercity routes that require high maneuverability, durability, and reliable safety performance.