How to use Hydraulic Hose Assembly Cut Length& Cut-off Calculator
- Enter Calculation mode and adjust the options as needed.
- Run the tool and inspect its results, evidence and limitations.
- Copy or download the result, then verify it against the actual website, source data or business records.
Try a concrete example
For 1000 mm OAL with 35 mm cut-off on each straight end (70 mm total), hose cut length is 930 mm with SAE J517 tolerance of ±1% (±10 mm) and pressurized length range of 960 to 1020 mm.
How to interpret results
Conforms to SAE J517 / ISO 12151 manufacturing standards, calculating cut length from fitting cut-off factors (B1/B2) with vector assembly schematics and pressurized elongation bands.
Frequently asked questions
What is the fitting cut-off factor in hydraulic hose assemblies?
Cut-off factor (often labeled B, C or Cut-off) is the net axial distance from the fitting reference point to the hose end stop. Hose cut length equals required overall length (OAL) minus the sum of both fitting cut-offs (Cut Length = OAL - B1 - B2).
Why must high pressure hydraulic hose assemblies not be installed tight?
Under working pressure, wire braids or spirals shift, causing length changes of -4% to +2% per SAE J517. Tightly stretched hoses will experience severe stress at the fitting crimp collar, risking blow-off or fitting failure.
What are the standard length tolerances for hose assemblies under SAE J517?
SAE J517 defines length tolerances: ≤305mm (12") is ±3mm (±1/8"); 305mm to 457mm (18") is ±5mm (±3/16"); 457mm to 914mm (36") is ±6mm (±1/4"); >914mm (36") is ±1% of overall length.
What precautions are needed when both hose ends have elbow fittings?
When both ends are elbow or flange fittings, verify the centerline cut-off and lock the relative orientation/phase angle (0° to 360° counter-clockwise) before final crimping to avoid torsional twisting.