1578T11
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| Part Number | BFHITBB |
| Spring Type | Die |
| Length | 2" |
| Compressed Length @ Maximum Load | 1.5" |
| Deflection @ Maximum Load | 25% |
| Load Max. | 340 lbs. |
| Color | Semi-Clear Yellow |
| Material | Polyurethane Rubber |
| For Hole Diameter | 7/8" |
| For Shaft Diameter | 3/8" |
| Hardness | Durometer 95A |
| Temperature Range | -50 to 180° F |
| RoHS | RoHS 3 (2015/863/EU) Compliant |
| REACH | Not Compliant |
| DFARS | Specialty Metals COTS-Exempt |
| Country of Origin | China |
| USMCA Qualifying | No |
NOTE:All other trademarks are the property of their respective owners.
All other trademarks mentioned herein are used for the purpose of compatibility description and product identification only. Lily Bearing is not affiliated with, endorsed by, or sponsored by the holders of these trademarks.
Design Features of BFHITBB Spring
BFHITBB are designed to operate under compression in environments where standard alloy steel springs would suffer accelerated surface degradation, storing energy when compressed and returning to their original length when the load is released. Constructed from materials such as stainless steel or surface-treated alloy steel, these springs provide the mechanical performance of conventional die springs while withstanding exposure to moisture, chemicals, cleaning agents, and humid or washdown conditions. Their rectangular wire cross-section maintains the high load-to-size ratio characteristic of die springs, and the corrosion-resistant material or coating is selected to preserve dimensional integrity and fatigue strength over extended service. Overall performance depends on factors such as wire dimensions, coil geometry, material grade, and surface treatment, which together govern load capacity, deflection range, corrosion resistance level, and service life.
What Benefits Can BFHITBB Spring Provide?
- Extended Service Life in Harsh Environments – Resistant materials and surface treatments prevent rust and surface pitting, maintaining spring geometry and load consistency far beyond the service life of untreated steel springs in wet or chemically active conditions.
- Maintained Load Accuracy – By preventing corrosion-induced material loss on wire surfaces, they preserve the original wire cross-section dimensions, ensuring force output and deflection behavior remain within specification throughout service.
- Reduced Maintenance Frequency – Corrosion resistance eliminates the need for frequent spring inspection, lubrication, and replacement cycles driven by rust-related degradation, lowering overall tooling maintenance costs.
- Broad Chemical Compatibility – Stainless steel and coated variants withstand exposure to cutting fluids, mold release agents, cleaning solvents, and mild acids encountered in manufacturing and food processing environments.
- Reliable Performance in Temperature and Humidity Extremes – Suitable for outdoor, coastal, cold storage, and high-humidity production environments where condensation and temperature cycling would rapidly corrode standard die springs.
- Direct Dimensional Replacement – Manufactured to the same outer diameter, inner diameter, and free length standards as conventional die springs, allowing direct substitution into existing tooling without design modification.
What Can BFHITBB Spring Be Used for?
- Food and Beverage Processing Equipment – In tooling, packaging machinery, and processing lines subject to frequent washdown with water, steam, and sanitizing chemicals where corrosion-free components are required.
- Medical Device and Pharmaceutical Manufacturing – For die and mold tooling operating in cleanroom environments or exposed to sterilization agents, where material purity and surface integrity are critical.
- Marine and Coastal Industrial Equipment – In machinery and tooling exposed to salt air, seawater spray, or high ambient humidity that would rapidly corrode standard alloy steel springs.
- Outdoor and Agricultural Machinery – For linkage, tensioning, and forming tooling on equipment operating in rain, mud, and chemically treated field environments.
- Chemical Processing and Laboratory Equipment – In tooling and fixtures exposed to acids, alkalis, solvents, and other aggressive media encountered in chemical manufacturing and analytical instrumentation.
- Cold Storage and Refrigeration Systems – For components operating in low-temperature, high-condensation environments where freeze-thaw cycling and persistent moisture accelerate corrosion in standard spring materials.




