Bore 0.7500 / 3/4-16 ThreadHJMX-12(T) 0.7500 3/4-16 Chromoly Standard Rod End
HJMX(-T) Product Overview
HJMX-12(T) features a 0.7500″ bore (B) and 1.500″ body diameter (D), with a 1.375″ precision-ground 52100 steel ball running in a stainless steel race. Overall body length (AM) is 3.375″, thread engagement (CM) measures 2.000″. Width (W) is 1.280″ and body thickness (T) is 0.630″; outer reference diameter (O) is 0.970″. Approximate weight: 0.820 lbs.
Rated at 38,707 lb static radial load with ±19° misalignment angle, this 3-piece precision rod end with a 3/4-16 UNF 3A thread suits maximum-load suspension, truck steering, and extreme-duty industrial assemblies. The heat-treated 4130 chromoly body delivers superior strength-to-weight ratio over standard carbon steel designs.
Available as a standard version (HJMX-12) or PTFE-lined (HJMX-12T) for maintenance-free, lubrication-free operation. Polished hard chrome finish available on request. Body is 4130 chromoly steel, heat treated and chrome plated; race is stainless steel for corrosion resistance.
HJMX(-T) Series — Full Size Range
All available sizes in the HJMX(-T) series. Can’t find your size? Contact us for custom dimensions.
| PART NO. | BORE X THD. SIZE REF. | B DIA. +.0025 -.0005 | D DIA. +.010 -.010 | W WIDTH +.005 -.005 | T WIDTH +.005 -.005 | BALL DIA. REF. | AM LGTH +.015 -.015 | N THD. UNF 3A | CM LENGTH +.031 -.031 | O DIA. REF. | a° MIS. ANGLE REF. | STATIC RADIAL LOAD (LBS) | APPROX WEIGHT (LBS) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HJMX-6(T) | 3/8x3/8-24 | 0.3750 | 1.125 | 0.813 | 0.355 | 0.781 | 2.125 | 3/8-24 | 1.281 | 0.512 | 22 | 11,410 | 0.12 |
| HJMX-7(T) | 7/16x7/16-20 | 0.4375 | 1.312 | 0.875 | 0.355 | 0.875 | 2.438 | 7/16-20 | 1.468 | 0.618 | 21 | 15,760 | 0.23 |
| HJMX-8(T) | 1/2x1/2-20 | 0.5000 | 1.500 | 0.937 | 0.411 | 1.000 | 2.625 | 1/2-20 | 1.562 | 0.730 | 19 | 23,705 | 0.33 |
| HJMX-10(T) | 5/8x5/8-18 | 0.6250 | 1.750 | 1.200 | 0.577 | 1.250 | 2.875 | 5/8-18 | 1.687 | 0.856 | 19 | 28,110 | 0.57 |
| HJMX-12(T) | 3/4x3/4-16 | 0.7500 | 1.500 | 1.280 | 0.630 | 1.375 | 3.375 | 3/4-16 | 2.000 | 0.970 | 19 | 38,707 | 0.82 |
| PART NO. | B | D | W | T | BALL | AM | N | CM | O | a° | STATIC | LBS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HJMX6-7(T) | 0.3750 | 1.125 | 0.813 | 0.355 | 0.781 | 2.125 | 7/16-20 | 1.281 | 0.512 | 22 | 16,985 | 0.16 |
| HJMX7-8(T) | 0.4375 | 1.312 | 0.875 | 0.355 | 0.875 | 2.438 | 1/2-20 | 1.468 | 0.618 | 21 | 19,025 | 0.25 |
| HJMX8-10(T) | 0.5000 | 1.500 | 0.937 | 0.411 | 1.000 | 2.625 | 5/8-18 | 1.562 | 0.730 | 20 | 25,277 | 0.39 |
| HJMX10-12(T) | 0.6250 | 1.750 | 1.200 | 0.577 | 1.250 | 2.875 | 3/4-16 | 1.687 | 0.856 | 20 | 44,650 | 0.60 |
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 HJMX(-T) Rod Ends Are Used
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HJMX(-T) Frequently Asked Questions
What is the difference between standard and heavy-duty HJMX rod ends?
The HJMX series includes standard RES part number sizes and heavy-duty shank variants. The heavy-duty versions use larger thread sections while retaining the same general high-strength chromoly rod end concept.
What materials are used in the HJMX(-T) series?
This series uses a hard-chrome-plated 52100 bearing steel ball, a stainless steel race, and a 4130 chromoly body that is heat treated, chrome plated, and available with PTFE-lined construction.
What does the T suffix mean on HJMX part numbers?
The T suffix identifies the PTFE-lined version. The specification notes use JMXR12T as the example format, but the same PTFE-lined suffix logic applies to the HJMX series.
Are polished hard chrome finish options available for HJMX rod ends?
Yes. The HJMX(-T) series is available in polished hard chrome finish according to the product notes, subject to the exact part and order requirement.
Are metric or studded variants available for this series?
Yes. Studded configurations are available, and the product notes also point users to the metric JMX-M and JFX-M family for metric sizing.
What applications are best suited to HJMX(-T) rod ends?
HJMX(-T) rod ends are well suited to suspension systems, steering linkages, heavy-duty link assemblies, and performance or industrial builds that need stronger chromoly rod ends with standard or heavy-duty shank options.