INKOMA HSG Series Maintenance and service guide

Datum: 29.05.2006
Installation/Maintenance
of Precision Screw Jacks
(HSG)
Seite 1 von 4T 7-031-03
INKOMA Maschinenbau GmbH
Neue Reihe 44,
D-38162 Schandelah
Tel.: [phone] - 0
Fax: [phone] - 50
Internet: www.INKOMA.de
Please read this document to ensure correct installation and maintenance. Performance and warranty can only be
upheld upon adherence to our recommendations.
INKOMA Screw Jacks are precision engineered, ready lubricated, quality controlled and inspected.
In case of fault, failure or damage, please inform us immediately.
Contents
1. Maintenance ................................................................................................................................................................................ 1
1.1 Grease Lubrication .................................................................................................................................................................... 1
1.2 Oil Lubrication ........................................................................................................................................................................... 2
1.3 Lubrication of Trapezoidal Spindles........................................................................................................................................... 2
1.4 Lubrication of Ball-Screw Spindles (KGS).................................................................................................................................. 2
1.4.1 Grease Lubrication (KGS)....................................................................................................................................................... 2
1.4.2 Oil Lubrication (KGS) .............................................................................................................................................................. 2
2. Ball Screw Spindle ...................................................................................................................................................................... 3
3. Spindle Protection ....................................................................................................................................................................... 3
4. Ambient Temperature ................................................................................................................................................................. 4
5. Installation ................................................................................................................................................................................... 4
6. Commissioning ............................................................................................................................................................................ 4
7. Spare Parts ................................................................................................................................................................................. 4
1 Maintenance of Screw Jack Type HSG
HSG 0 to HSG 500 are supplied grease filled as standard. Oil lubrication is available upon request.
Leaving equipment idle for long periods (longer than six months) may lead to a deterioration on the seals resulting in
leakage. We therefore recommend that the input shaft be turned regularly. If the Screw Jack is not installed immediately,
store it in its installation position in a dry area.
Screw Jack with safety nut and bellows: Please remove the bellows to carry out periodic checks on the control gap of the safety
nut.
1.1 Grease Lubrication
The Screw Jacks are ready greased (Klüber Microlube GB 0). Replace the grease every 700 operating hours or 18 months,
whichever comes first. Topping up should not be necessary.
HSG-0 HSG-1 HSG-2 HSG-3 HSG-4 HSG-5 HSG-200 HSG-300 HSG-400 HSG-500
Amount [kg] 0,06 0,1 0,12 0,2 0,45 0,8 0,9 - - -
Table1 Required quantity of grease for Screw Jacks Type HSG 0 – HSG 500

Datum: 29.05.2006
Installation/Maintenance
of Precision Screw Jacks
(HSG)
Seite 2 von 4T 7-031-03
INKOMA Maschinenbau GmbH
Neue Reihe 44,
D-38162 Schandelah
Tel.: [phone] - 0
Fax: [phone] - 50
Internet: www.INKOMA.de
1.2 Oil Lubrication
Synthetic gear oil to ISO VG 460 DIN 51 519 specification (Klübersynth GH 6-460) is used.
As the efficiency of the worm geared drive is dependent on the quality of the oil, we recommend that either the original
specification or a direct equivalent is used when replacing the oil. It is vital that high standards of cleanliness be maintained (use
a filter or a fine sieve).
During operation oil is deposited inside the gear housing. After commissioning the oil level should be re-checked at
standstill and replenished if necessary. The correct oil filling is when the level is in the upper third of the sight glass.
During the running-in period metal particles are deposited in the oil. The oil should initially be changed after 50
operating hours. Further oil changes, depending on the load, should be at 1000 operating hour intervals or after 2
years at the latest.
Oil should be drained when the gearbox is warm. Flush with a clean, thin flushing oil before refilling.
NOTE:
Klübersynth GH-6 oils do not mix with Mineral Oils and synthetic hydro-carbons. We therefore recommend that the
gearbox be flushed out with the same oil with which it will be refilled.
During operation oil is deposited inside the gear housing. Please refer to us for the correct amount of oil required.
Check the level at standstill and top up if necessary. The correct oil filling is when the level is in the upper third of the sight glass.
1.3 Lubrication of Trapezoidal Spindles
The spindle should be generously greased. Dependent on the application and whether protection is fitted, the spindle should be
regularly cleaned and re-greased. In this case Klueber Microlube GB-0, Klueberplex GE 11-680 (or equivalent specification)
can be used.
1.4 Lubrication of Ball-Screw Spindles (KGS)
The Ball-Screw should be cleaned at regular intervals. Lubrication is via the Ball Nut and may be with grease or oil.
1.4.1 Grease Lubrication (KGS)
For grease lubrication, Mineral Oils Grade K2K, DIN 51825 are recommended. If the load is in excess of 10% of the dynamic
load capacity of the spindle, greased with EP additives (KP2K, DIN 51825) should be used. For high speeds (nominal velocity
n*d>50000) Grade K1K or KP1K should be selected. Speeds below 2000 n*d require Consistency Class 3 (K3K or KP3K, DIN
51825). The frequency of re-lubrication depends on the ambient conditions. Generally, re-lubrication should be every 200-600
operating hours. As a guide the amount of grease is 1 cm3per nut for 1 cm of spindle diameter. Only greases having the same
specification should be used.
1.4.2 Oil Lubrication (KGS)
Lubricating Oils Class CL to DIN 51517 Part 2 are suitable. At operating temperature the oil should have a viscosity of
68-100 mm2/s. For high speeds (speeds of n*d>50000) select oils having a Viscosity Class of ISO VG 46-22. For speeds below
2000 n*d use oils having Viscosity Class ISO VG 150-460. For oil bath lubrication the spindle should be 0.5 -1 mm below the oil
surface. Oil feed for oil circulation should be 3-8 cm3/h per ball circuit.

Datum: 29.05.2006
Installation/Maintenance
of Precision Screw Jacks
(HSG)
Seite 3 von 4T 7-031-03
INKOMA Maschinenbau GmbH
Neue Reihe 44,
D-38162 Schandelah
Tel.: [phone] - 0
Fax: [phone] - 50
Internet: www.INKOMA.de
2 Ball-Screw Spindles (KGS)
Screw Jacks with ball-screw spindles must be installed avoiding radial or eccentric loads on the spindle. Ball-screws are only
suitable for the transmission of axial forces. Limit switches should be provided to prevent overrunning of the lift range and
consequent damage to the spindle. The nut must not be installed without the use of a guide bush over the spindle end. Do not
apply any force. Do not remove the guide sleeve until the nut is completely engaged with the spindle. Spindles must be
supported so that no bending is possible. Spindle should not lie directly on the nut.
The guide tubes, located on the outside of the nut, must not be damaged. Disassembly of the guide tubes can only be carried
out at the factory. Ball-screws are sensitive to dirt and damage. Protect spindles from dirt contamination. Remove contamination
with petrol, thin oil or flushing media. Do not use white spirit or other paint solvents - these will damage the spindle!
Ball-screws must be precisely aligned with their guides.
Ball-screws are normally supplied with the nut assembled. Should dismounting be necessary, please seek advice from us.
To maintain effective operation, the ball-screw must be adequately lubrication (same lubrication as for ball bearings).
Do not use greases with MoS2 (Molybdenum Di-Sulphide) or graphite additives. Normally lubricants can be selected which
correspond to those for other machine functions. Life time lubrication of the nut is not possible since there will always be some
loss of lubricant (for lubrication see 1.4).
NOTE:
• Do not disassemble the guide tube mechanism.
• Do not replace missing balls with new ones. The entire set must be replaced.
3 Spindle Protection
Bellows and spiral protective sleeves prevent dirt contamination of the spindle.
Bellows
Check bellows regularly for cracks. Replace if necessary. For high lift speeds, provision for ‘breathing’ bellows will be
made during manufacture.
Spiral Sleeves
Effective protection is only guaranteed if the sleeves are lubricated.
Assembly
• Spiral sleeves are supplied compressed along their length and secured with ties.
• Slide spiral sleeve over spindle in the secured state.
• The ties must only be removed when the sleeve has been installed and placed under end pressure.
Please take care when releasing the ties.
• Spiral sleeves must not be unwound
• Spiral sleeves will require approx 20 movements to achieve normal operation.
• Before commissioning oil lightly !

Datum: 29.05.2006
Installation/Maintenance
of Precision Screw Jacks
(HSG)
Seite 4 von 4T 7-031-03
INKOMA Maschinenbau GmbH
Neue Reihe 44,
D-38162 Schandelah
Tel.: [phone] - 0
Fax: [phone] - 50
Internet: www.INKOMA.de
4 Ambient Temperature
Screw Jacks Type HSG are designed for operation between +75°C and -15°C. Outside this range, special seals and
lubricants are necessary.
5 Installation
The prevent leakage due to pressure build-up inside the gearbox, oil lubricated Screw Jacks are supplied with a combined
breather and filler plug. This will be plugged for transit purposes. Before commissioning and for long term storage the solid plug
must be replaced with the combined filler and breather plug.
Screw Jacks should be mounted to a solid base or flanged directly onto the machine. For operating safety and quiet running the
shaft should be very carefully aligned. To compensate for any misalignment, we recommend the use of flexible couplings (e.g.
INKOMA ELAFLEX). Do not fit the coupling by driving, it is a light interference fit. To prevent damage to the worm and bearing
assembly the coupling should be press fitted onto the supported shaft. If a press is not available a suitable clamp should be
used.
Additionally, parallel guidance of the spindle must be carefully monitored in both axes to avoid side loads. Ensure that no
eccentric or radial load is present. Misalignment of the spindle results in excessive wear of the thread flanks and in a shortened
life.
NOTE:
The spindle must be free from dust and dirt before installation/commissioning.
Trapezoidal spindles must be generously greased (see 1.3 for grease specification).
Ball-screws are lubricated by the nut (see also 1.4).
6 Commissioning
All Screw Jacks are test run. Following installation each spindle should be run unloaded for the full stroke, up and down. Any
noise may be due to stiffness. Further runs should be made during which the load is increased gradually to the nominal
capacity. If intermittent noise is heard, the alignment should be thoroughly checked.
7 Spare parts
When ordering spares, please provide the size, design, stroke length and any special details of the Screw Jack. Repairs require
special tools. We recommend a return to our factory should repairs be necessary.
We reserve the right to make technical changes to the design!