Page 57 - 2010-2022 hose manufactureing ability and guide

Table 4-8
LENGTH TOLERANCES
Tolerances for Specific Cut Lengths of Hose

These tolerances apply to hose which is made in conventional
lengths and then cut to specified shorter pieces.

Length Tolerances
Inch Metric ±Inch ±Millimeters

12 and under 305 mm and under 0.125 3.18mm
Over 12 through 24 305 mm through 610 mm 0.188 4.8mm
Over 24 through 36 610 mm through 915 mm 0.250 6.4mm
Over 36 through 48 915 mm through 1.22 m 0.375 9.5mm
Over 48 through 72 1.22 m through 1.83 m 0.500 12.7mm
Over 72 1.83 m 1% 1%

Note: For tolerances of curved-to-shape hose, see SAE J20 or J30.

Tolerances for Hose Built to Length

When fittings or special ends are built-in the hose at the time
of manufacture, tolerance is applied to overall length.

Length Tolerances
Feet Meters ±Inch ±Millimeters

5 and under 1.5 and under 1 25.4
Over 5 through 10 1.5 through 3.0 1.5 38
Over 10 through 20 3.0 through 6.0 2.5 64
Over 20 6.0 1% 1%

Note: These tolerances should not be applied to corrugated or convoluted hose.

Squareness of Ends

Ends must be cut square within the tolerance limits
shown below:

Size Maximum Variation
Inch Millimeters ±Inch ±Millimeters

3/4 and under 19.1 and under 0.063 1.59 mm
Over 3/4 through 2 19.1 through 51 0.125 3.18 mm
Over 2 through 6 51 through 152 0.250 6.4 mm

Note: These tolerances should not be applied to hose containing helical reinforcing wire where wire will protrude from the
end when cut.

RMA/IP-2/2003 36