Modul Drum Brake Axle Type B

The square spring drum axle 17.5 low-booster is one of the specialized products of RST Axles, designed for light to medium-duty vehicles and small trailers. With a load capacity of 9,000 kilograms and a drum brake system with a 300 mm diameter, this axle delivers high levels of safety, strength, and durability under a wide range of operating conditions. The low-booster design improves force distribution and enhances stability during loading, resulting in greater driving safety for both the driver and the cargo.

In terms of technical specifications, this axle is available under product codes 81500120005 and 81500120016. Its BM distance is 1950 and 1995 mm, and the kingpin distance (SP) is 1100 mm. It features a 10-bolt wheel pattern (M22×1.5), and is recommended for use with tire sizes 235/75 R 17.5 and 245/70 R 17.5, which are among the most commonly used tires for medium-duty vehicles. These characteristics make the axle suitable for long-distance transport and challenging road conditions.

محور کاسه ای فنری چهارگوش 17.5 بوستر پایین با کد 260

Axle Technical Data Table

Product code Axle Load Brake system LD BM FM SP OH/K Tyres Recommended
81500120005 9000kg DrumBrake Ø300 360 940 1100 1950 175/225
10Bolts M22 x 1.5		 235/75 R 17.5
245/70 R 17.5
81500120016 400 1995

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 87 140 130 - 268 240
180 165 50 270

Axle Technical Data Table

Product code
81500120005
81500120016
Axle Load
9000kg
-
Brake system
DrumBrake Ø300
-
GM
360
400
BM
640
-
FM
1100
-
SP
1950
1995
OH/K
175/225 10 Bolts M22 x 1.5
-
Tyres Recommended
235/75 R 17.5
245/70 R 17.5
-

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 دیسکی شاهنگی eco

The suspension system of the 17.5 square spring axle is also precisely designed to ensure optimal balance and force distribution in both unloaded and loaded conditions. The defined standards for the X distance, spring bracket, and ST and FH dimensions help reduce additional stress on the chassis and extend the service life of components.

The key advantages of this axle include the high durability of the drum brake system, stable performance under various road conditions, easy maintenance, and a design compatible with light and medium-duty trailers. The 17.5 low-booster square spring drum axle is a reliable option for transportation companies and trailer manufacturers seeking a combination of safety, quality, and cost efficiency.