Execution of throats

Recommendation for the calculation and machining of piston grooves in hydraulic application.

Diameter from 18 to 200 mm, all segments except those whose faces are not parallel...

In case of bilateral thrusts, both sides of the throat are rectified: Ra ≤ 0.8nm
Bore of cylinder	D = d1, tolerance H7 (d1: Nominal Ø of segment)
Piston	d diameter = d1, tolerance f8
Backlash	z: according to d1, see table P1
Throat bottom diameter	dL = d min - (2.a1 max + z)
Tolerance on dL	-0.00 / -0.20 mm
Width of throw	L = h1, tolerance according to table P
Radii at the bottom of the slot	R : as Dl, see table P1

Table P

Tolerance on L Pressure
Side	bilateral
Tolerance C9	Tolerance F8

Table P1

	Z	R
dl > 100 mm	0.80	0.50
dl ≤ 100 mm	0.50	0.30