Trailer Axle Parts Straight Spindle Round Tube

Straight Spindle

This is the welded replacement spindle for the 2000 to 22000 pound trailer axle. This is a BT 16 trailer spindle that can accommodate 1 1/16 "wheel bearings and 1 1/2" Id grease seals. You will see the exact size from the picture. You can use this spindle with a pre lubricated boat trailer hub, sealed with a galvanized 5 lug 1 1/16 "bearing 1 1/2" to completely replace one side of the trailer axle. This spindle includes spindle washers, slotted nuts, and split pins.
This is an Accu-Lube type spindle, which means you can use the grease joint at the tip of the spindle to regularly oil the trailer wheel bearings. The grease enters the joint and is then discharged through the grease port located directly inside the grease seal. This allows the grease to be contained and sealed in the chamber of the hub. The total length of this spindle is 8 1/2 ".

Bearing	44649/68149	15123/25580
Tail bar diameter	2 ”	2.25”
Tail bar length	4”	4”

Function of Trailer Straight Spindle

Trailer straight spindle is a mechanical component commonly used in engineering machinery such as trailers, trucks, excavators, loaders, etc. Its main function is to transfer power from the vehicle's engine to the transmission system to drive mechanical equipment.
The straight spindle of a trailer usually consists of one or more axles, which are connected together through threads or pins to form a whole. One end of the spindle is connected to the vehicle's engine or generator, while the other end is connected to the transmission system of the mechanical equipment. On the straight spindle of a trailer, there is usually a reducer or transmission used to reduce or change the power of the spindle to meet the load and speed requirements of mechanical equipment.
The function of the trailer's straight spindle is to transmit the power of the vehicle to the mechanical equipment, in order to drive the equipment to work. It is usually used for mechanical equipment that requires a lot of power, such as trailers, trucks, and excavators.

Manufacturing Process of Trailer Straight Spindle

Trailer straight spindle is a special mechanical component commonly used in large mechanical equipment such as cranes and excavators. The production process requires the following steps:

1. Material selection: The straight spindle of the trailer is usually made of high-strength alloy steel materials, such as 40Cr or GCr15. These materials need to have high hardness, toughness, and wear resistance to meet the requirements of long-term use.
2. Cutting: Use cutting equipment to cut alloy steel materials into the required dimensions and shapes.
3. Forming: The cut material is processed through forming equipment to create the preliminary shape of the trailer's straight spindle.
4. Heat treatment: Heat treat the formed straight spindle of the trailer to improve its hardness and toughness. Heat treatment usually uses techniques such as carburization and quenching to achieve the required performance indicators.
5. Grinding: Grind the straight spindle of the trailer after heat treatment to remove surface defects and errors, and achieve the required size and accuracy.
6. Coating: Apply a layer of wear-resistant coating on the surface of the trailer's straight spindle to improve its wear and corrosion resistance.
7. Assembly: Assemble the trailer straight spindle with other components, such as bearings, gears, etc., to form a complete trailer straight spindle system.
8. Inspection: Conduct quality testing on the assembled trailer straight spindle system, including measuring dimensions, hardness, toughness, and other indicators to ensure that it meets the required performance requirements.
   The above are the main steps in the production process of the trailer straight spindle, and the specific production process may vary depending on different process requirements and technical bottlenecks.