Dunlop 12"X2 Suspension Air Spring Norgren M/31122 Air Assembly

Brand New Dunlop 12"x2 Suspension Air Spring Norgren M/31122 Air Assembly

Air Spring Introduction

Air springs have been a cornerstone of heavy-duty vehicle suspension systems for nearly a century, leveraging the compressed air already required for braking systems to deliver exceptional functionality. Compared to traditional mechanical leaf or coil springs, air springs offer two key advantages. Firstly, air suspension provides enhanced comfort by enabling adjustments to the air pressure within the spring. This flexibility modifies the spring rate, optimizing ride quality to suit varying conditions. Secondly, with the ability to control air pressure, the deck or trailer height can be adjusted with precision. This makes aligning the deck to loading docks possible even in the absence of dock plates, adding significant operational convenience.

2B12×2T Air Spring Features

• Cover Plate

Top Cover Plate Diameter: 260 mm
Screw Center Distance of Top Cover Plate: 232 mm
Bottom Cover Plate Diameter: 260 mm
Screw Center Distance of Bottom Cover Plate: 232 mm

• Nut/Blind Nuts

Top Cover Plate Screw(Nut) Tooth: 4×M10
Bottom Cover Plate Screw(Nut) Tooth: 4×M10

• Gas Hole/Air Inlet/Air Fitting

Air Hole: G 1/2

• Rubber Bellow

Rubber Bellow Max. Diameter: 300 mm
Space Required: 325 mm
Natural Height: 252 mm
Minimum Height: 75 mm
Maximum Height: 340 mm

OEM Part Numbers

GUOMAT NO. 2B12X2T
Norgren NO. M/31122
Norgren NO. M 31122
Norgren NO. M31122
Weweler USN 510011KD
Contitech FD 412-18 1/2 M10
Contitech FD 412 18 1/2 M10
Contitech FD412-18 1/2 M10
Contitech FD412 18 1/2 M10
Order No 60040070 ST 20301.F Air Spring
Gigant 881202
Fire-stone W01 R58 4061
Fire-stone W01-R58-4061
Granning 15813
Goodyear 2B12-2452 Ø260
Goodyear 578-92-3-2452 Rp 1/2"
Airtech 2B-300 / 113300
Weight (Kg): 6,42 QIP: 45
Order No 60040071 ST 20301-01.F Air Spring

Rubber Damage from Chemicals

1. Grease and oil are common examples that can cause this condition after
2. prolonged contact with the rubber flexible member.
3. Possible causes:
4. Excessive oil in the air supply.
5. Excessive greasing of universal joints.
6. Excessive greasing of the fifth wheel.
7. Leaking seals in suspension components.
8. Use of petroleum based cleaners on the air spring (use only soap and water for cleaning)

Company Profile

Guangzhou Guomat Air Spring Co., Ltd. is founded in 2008, the company covers an area of 20000 square meters, registered capital is 10 million yuan, the existing various types of professional and technical personnel is 85 people.The company is located in Guangzhou, about 15min's drive from Baiyun Airport. and our main products are air spring, rubber bellows, air suspension spring, air suspension compressor and refitted suspension system. They are widely used in bus, truck, cabin, vehicles' seat, luxurious car and industrial machine field.

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