Production capabilities
Gearbox assembly
In cooperation with ZPA Pečky, a.s., we perform
QUARTER-TURN MOTOR WORM GEARBOXES - ZPM
ZPM motor worm gearboxes with 90° tilt are used in combination with MODACT multi-turn servo motors to control valves which necessitate high torque values.
The gearbox structure consists of a housing and a cover made of aluminum alloy, a worm gear (segment) made of malleable cast iron, a steel worm and a shaft made of a single piece of high-quality steel material, and high-quality tapered roller bearings. ZPM gearboxes use a solid lubricant that does not need to be changed throughout their entire service life. These gearboxes have an ingress protection rating of IP 67 as standard. Their operating temperature range is -40°C to +80°C.
The stop screws, accessible from the outside, allow for an easy adjustment of the end stops, and by extension for a quick adjustment based on the valve fitting used.
The range of possible surface treatments includes several degrees of corrosion resistance, and it is the same as with the MODACT servo motors.
Gear manufacture
Bevel gear milling:
ø70-500 mm; axial tilt 45°-135°; max. tooth depth 19.5 mm; hypoid ±60° using the following machines: ZFTK 250, ZFTK 500 (straight teeth), ZFKK 500, ZFWKK 450, ZFTKK 500, Enims 580 (curved teeth Gleason), SKM2, SM3 (curved teeth Oerlikon).
Spur gear and gear rack milling:
ø20-1.000 mm; module 0,5-10 mm; tilt ±85° using the following machines: OFA 16 A, OFA 16 SC, OFP 20, OFP 32, FO 6, FO 10, GFL 400.
Spur gear and gear rack slotting:
External gearing: ø30-500 mm; modules 1-6 mm; max. stroke 90 mm; Internal gearing: ø30-450 mm; modules 1-6 mm; max. stroke 90 mm; using the following machines: OHA 32A, OHA 16 B, OHA 12 A, OH6.
Spur gear grinding:
ø30-600 mm; modules 2.5-10 mm using the following machines: ZSTZ 315 C, ZSTZ 630 C.
Lapping using the following machines: SKL 1, ZLK 500.
Gears are tested using the following instruments: SKT 1, ZPLK 500.
Grinding
Our bore grinding station is equipped with the following grinders: BDA 50, 80, 100, 200, 300, BDU 250, SIB 315x500.
We use grinders BH 25 A, BUA 31, BUA 20 for cylindrical grinding, and BPV 300 for planar grinding.
Straight-edge gear rack grinding.
Non-rotary machining
Intermediate housing-type products with a maximum size of 1000×610×610 mm are processed using state-of-the-art machining centers HURCO VMX 42t and HAAS VCE 500. We also have at our disposal milling machines FA4H and F2V CNC.
Rotary machining
Another part of our production program comprises machining of cylindrical parts with a diameter of up to 200 mm. This applies mainly to the mass production of intermediate gearing products using our machinery fleet, namely the turning machines and centers SPT 32 NC, SPT 16 NC, SPRY 40 CNC, SU 50/A, SV 18 R/10.
Valves controllable via ZPM gearboxes
Ball valves, butterfly valves
We offer gearboxes with DIN/ISO output flanges. The input shaft is right-handed by default, and the closing direction relative to both the input shaft and the output is also clockwise.
Raised position-indicators are used in cases where the valve shaft is longer than the permitted gearbox assembly length. These raised indicators are made of steel.
They meet all the requirements for maintenance-free construction of high-stress equipment with a long service life.