3/4-16CBS-15 XBS-15 Forged Poly Bushing
FORGED POLY BUSHING Product Overview
CBS-15 / XBS-15 is a forged poly bushing with 3/4-16 thread. Housing OD (A) = 2.0″, housing length (C) = 2.95″. Bushing bore (B) = 0.5″, housing ID (D) = 1.5″, overall width (w) = 2.0″.
The CBS (carbon steel body) and XBS (4130 chromoly body, heat treated) variants use a polyurethane bushing running on a carbon steel BOM sleeve. Designed for high-deflection pivot points in 4-link suspension, trailing arms, and custom chassis builds where a reusable, rebuildable bushing joint is needed. The polyurethane bushing provides good NVH damping and resistance to petroleum products.
Carbon steel body (CBS-15). 4130 chromoly heat-treated body (XBS-15). Polyurethane bushing included. BOM sleeve included. Special bushing durometers available on request.
FORGED POLY BUSHING Series — Full Size Range
All available sizes in the FORGED POLY BUSHING series. Can’t find your size? Contact us for custom dimensions.
| Carbon Steel Part No. | 4130 Steel Part No. | Thread +.000 -.001 | A +.005 -.005 | C +.003 -.000 | B +.005 -.005 | D +.005 -.005 | w +.005 -.005 |
|---|---|---|---|---|---|---|---|
| CBS-1 | XBS-1 | 5/8-18 | 1.750 | 2.700 | 0.500 | 1.5 | 1.750 |
| CBS-2 | XBS-2 | 5/8-18 | 1.750 | 2.700 | 0.625 | 1.5 | 1.750 |
| CBS-3 | XBS-3 | 5/8-18 | 1.750 | 2.700 | 0.625 | 1.5 | 2.000 |
| CBS-4 | XBS-4 | 5/8-18 | 1.750 | 2.700 | 0.625 | 1.5 | 2.000 |
| CBS-5 | XBS-5 | 5/8-18 | 2.000 | 2.950 | 0.500 | 1.5 | 1.750 |
| CBS-6 | XBS-6 | 5/8-18 | 2.000 | 2.950 | 0.625 | 1.5 | 1.750 |
| CBS-7 | XBS-7 | 5/8-18 | 2.000 | 2.950 | 0.500 | 1.5 | 2.000 |
| CBS-8 | XBS-8 | 5/8-18 | 2.000 | 2.950 | 0.625 | 1.5 | 2.000 |
| CBS-9 | XBS-9 | 3/4-16 | 1.750 | 2.700 | 0.500 | 1.5 | 1.750 |
| CBS-10 | XBS-10 | 3/4-16 | 1.750 | 2.700 | 0.625 | 1.5 | 1.750 |
| CBS-11 | XBS-11 | 3/4-16 | 1.750 | 2.700 | 0.500 | 1.5 | 2.000 |
| CBS-12 | XBS-12 | 3/4-16 | 1.750 | 2.700 | 0.625 | 1.5 | 2.000 |
| CBS-13 | XBS-13 | 3/4-16 | 2.000 | 2.950 | 0.500 | 1.5 | 1.750 |
| CBS-14 | XBS-14 | 3/4-16 | 2.000 | 2.950 | 0.625 | 1.5 | 1.750 |
| CBS-15 | XBS-15 | 3/4-16 | 2.000 | 2.950 | 0.500 | 1.5 | 2.000 |
| CBS-16 | XBS-16 | 3/4-16 | 2.000 | 2.950 | 0.625 | 1.5 | 2.000 |
| CBS-17 | XBS-17 | 1 1/4-12 | 3.000 | 4.210 | 0.563 | 2.1 | 2.250 |
| CBS-18 | XBS-18 | 1 1/4-12 | 3.000 | 4.210 | 0.625 | 2.1 | 2.250 |
| CBS-19 | XBS-19 | 1 1/4-12 | 3.000 | 4.210 | 0.750 | 2.1 | 2.250 |
| CBS-20 | XBS-20 | 1 1/4-12 | 3.000 | 4.210 | 0.563 | 2.1 | 2.625 |
| CBS-21 | XBS-21 | 1 1/4-12 | 3.000 | 4.210 | 0.625 | 2.1 | 2.625 |
| CBS-22 | XBS-22 | 1 1/4-12 | 3.000 | 4.210 | 0.750 | 2.1 | 2.625 |
Every Unit Inspected Before Shipment
Raw Material Inspection
Material certifications verified. Composition confirmed by spectrometer before machining begins.
Thread Gauge Inspection
100% go/no-go gauge check on all threaded sections. Zero tolerance on dimensional non-conformance.
Load Capacity Test
Static and dynamic load tests run on representative samples from each production batch.
Dimensional Measurement
CMM verification of critical dimensions — ball diameter, bore, thread pitch, and body length.
Surface Inspection
Visual and tactile inspection for burrs, scratches, surface cracks, and plating defects.
Articulation Test
Misalignment angle and torque measured to confirm liner performance meets specification.
Heat Treatment Verify
Hardness tests confirm proper heat treatment on chromoly steel bodies and bearing balls.
Batch Documentation
Full traceability from raw material heat number to finished part. COC and inspection reports available.
Where FORGED POLY BUSHING Are Used
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FORGED POLY BUSHING Frequently Asked Questions
What are forged poly bushings used for?
Forged poly bushings are used in heavy-duty flex-joint and suspension applications where a compliant polyurethane bushing is combined with a forged outer body.
What materials are used in this series?
This series uses a polyurethane bushing, carbon steel BOM sleeve, and a 4130 chromoly heat-treated body as standard construction references.
What does the paired part number mean?
The size chart lists both a carbon steel part number and a 4130 steel part number for the same geometry family.
How do I choose the correct forged poly bushing?
Select by thread first, then confirm the B dimension and the overall package dimensions A, C, D, and w for the target suspension or linkage assembly.
Are these suitable for suspension flex joints?
Yes. This series is commonly used in suspension flex-joint applications where compliance, rebuildability, and forged strength are important.
Can I request other sizes or configurations?
Yes. For OEM or repeat fabrication programs, SYZ can review custom requirements based on the target assembly and performance needs.