29505798 Bolt Allison spare parts

29505798 Bolt Allison spare parts

Allison 29505798 bolts, as core fastening components of Allison transmissions, are hailed as the “strong link” connecting transmission parts. Their core function is to precisely fasten key parts such as the transmission housing, shaft system, gears, and support components, transmit loads, fix the position of components, and prevent bolts from loosening or falling off due to vibration during equipment operation. This avoids component displacement, wear, abnormal operating noise, or even transmission failure caused by fastening failure, ensuring stable power transmission of the transmission, extending the service life of the entire machine, and reducing maintenance costs and downtime losses.

Core technical parameters:

-Part Number: Allison 29505798
– Material Specifications: Made of high-quality, high-strength alloy steel (grade 10.9/12.9), balancing rigidity and toughness. Processed through professional heat treatment processes of carburizing, quenching, and tempering, with tensile strength ≥1040MPa (grade 10.9) and ≥1220MPa (grade 12.9), and Vickers hardness HV30 controlled between 312-388 (compliant with GB/T 4340.1-2009 arbitration test standard). The material contains a reasonable proportion of alloying elements such as chromium, nickel, and molybdenum, suitable for the heavy-load and high-frequency vibration conditions of the gearbox. The bolt surface is treated with galvanizing, cadmium plating, or Dacromet coating to enhance corrosion resistance and wear resistance, eliminating problems such as bolt breakage, rusting, and stripping caused by inferior materials, extending service life, and meeting the high-end manufacturing standards for automotive parts bolts.
– Structure type: Hex head bolt (or internal hex head, as required), with a one-piece molded structure. The threads are precision rolled, resulting in clear tooth profiles, high precision, excellent fit, and no risk of stripping. The bolt head features a reinforced design, strong load-bearing capacity, and can withstand large tightening torques. Some models are equipped with anti-loosening washers or thread anti-loosening coatings, employing an anti-loosening locking structure to effectively prevent bolt loosening caused by high-frequency vibration of equipment, resulting in more stable fastening performance. The bolt shank is smooth and free of burrs, cracks, and defects, ensuring precise fit with the nut and mounting hole, and no loosening or misalignment after tightening.
– Dimensions: Specifications range from M8 to M24 (compliant with standard fastener specifications), length 16-240mm, thread pitch 1.0-2.5mm, head width across flats 14-36mm, dimensional tolerance controlled within ±0.02mm, precisely matching Allison gearbox mounting hole dimensions and nut specifications, with a clearance controlled within 0.01-0.03mm. After installation, components can be precisely fastened, fully adapting to original factory installation size requirements, and the error meets industry precision fastener standards.
– Protective performance: Temperature resistance range -40℃ to 180℃, adaptable to the high temperature and high pressure environment inside the gearbox. After high and low temperature cycle testing, no cracks were generated and dimensional changes met the specifications after multiple cycles; oil resistance meets GB/T 1226-2010 standard, can withstand the corrosion of various gearbox oils and hydraulic oils, neutral salt spray test ≥96h, with excellent rust prevention, corrosion prevention and oil stain prevention capabilities; impact resistance meets ISO 16750 standard, can withstand the high frequency impact and tightening torque during gearbox operation, not easy to break or strip threads, excellent tensile and shear strength, meeting the requirements of high strength fastening.
– Applicable Scenarios: Dedicated to Allison series transmissions, widely used in commercial vehicles, heavy trucks, construction machinery and other equipment equipped with Allison transmissions. It is used for fastening key parts such as transmission housing, shaft system, gears, support components, and sealing components, undertaking the core tasks of component fixation and load transmission. It can be used for original parts replacement, transmission repair and maintenance, and is suitable for complex working conditions such as heavy load, high frequency vibration, and heavy oil contamination. It provides a stable guarantee for the connection of various transmission components and helps the equipment operate efficiently.

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