SAE J2028 pdf download
SAE J2028 pdf download.Front-Wheel-Drive Constant Velocity Joint Boot Seals.
1.1 This SAE Recommended Practice outlines the qualification testing and performance related criteria of elastomeric boot seals used in constant velocity pint applications. These applications are referred to as front- wheel-drive halfshafts or axles, but can also be utilized in rear-wheel-drive halt shaft applications. For additional information regarding CV joint systems and their applications refer to SAE AE-7 UniversaI Joint and Driveshaft Design Manual
1.2 The grease type and grease quantities, clamps and damping mechanisms of an assembly are critical and considered to be the same as OEM. service, or aftermarket designation. Although joint lubricating grease and clamping mechanism are no( addressed in this document, they are critical to a total system performance.
1.3 The purpose of this document is to establish a uniform practice for those in the surface vehide industry that specify and/or manufacture CV joint boot seals (boots) for OEM or aftermarket use with respect to qualif,cation testing for physical and mechanical properties.
1.4 This document is not intended to indude or address propeller shaft, Power Take Off, heavy equipment, and marine boot seal applications.
1.5 RatIonale
This document has been reaffirmed to comply with the SAE 5-Year Review policy.
2. References
2.1 Applicable Publications
The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the lalest issue of SAE publications shall apply.
2.1.1 SAE PuBucTIoNs
Available from SAE. 400 Commonwealth Drive, Warrendale, PA 15096-0001. Tel: 877-606-7323 (inside USA and Canada) or 724.776-4970 (outside USA). www.sae.org.
SAE AE-7–4jniversal Joint and Dnveshaft Design Manual
SAE J200—Rubber Materials In Automotive Applications
SAE J1344—Marking of Plastic Parts
SAE J3000—Plastic Materials in Automotive Applications
3.4 Boot seal manufacturers are encouraged to mark matenal family identification symbols to aid in recycling and/or disposal of CV joint boot seals at the end of their life cycle. Manufacturers are recommended to follow SAE J1344 as appropriate for marking of materials.
4. Performance Test Procedures
4.1 The test parameters and performance requirements of the CV joint boot seals are summarized in Table 1. Refer to Sections 5 and 6 for specific test procedures.
4.2 There are differences between rubber and TPE test performance requirements as outlined as follows and in Table 1. These differences are due to the rubber and TPE boot sealing systems responding differently under real world situations. The additional requirements for TPE are to evaluate the total sealing system package including grease and clamps.
a. Rubber Outboard: 5.1, 5.3, 5.4
b. Rubber Plunge: 6.1,6.3,6.4
c. TPE Outboard: 5.1, 5.2, 5.3, 5.4, 5.5
d. TPE Plunge: 6.1.6.2, 6.3 6.4, 6.5
5. Outboard CV Joint Boot Seal (Rotating. Non-Plunging
For each of the following tests, assemble a new boot seal to the shaft and CV joint with the proper clamps and grease quantities. A minimum of 2 boot seals should be run per test. The assembly is mounted In a horizontal plane for the following tests.
a. Break In of outboard CV Joint is recommended to prevent ovetheating the pint and affecting the boot seal performance.
5.1 Cold Test—All Boot Seals (Figure 1).
5.1.1 At 0 degree angle, allow the assembly to soak at room temperature for 12 h minimum prior to starting test. After the 12 h (72 h for TPE) soak cycle, rotate me assembly at 1000 RPM.
0 degree angle and room temperature for 5 mm in order to uniformly distnbute the grease. The room temperature soak is required to allow the elastomer compliance to adjust to the sealing surfaces and clamps.
5.1.2 Set the joint angle at 10 degrees, soak the assembly for 8 h minimum at —40°C prior to running the test.
5.1.3 Accelerate the assembly to 1000 RPM within lOs. Run for 10 mm at 1000 RPM at 10 degrees angle, while maintaining —40 °C.
5.1.4 Re-soak for 50 mm minimum at —40 °C.
5.1.5 Repeat5.1.3 and 5.1,4 for 2O cycles.
