Slew Drive Installation

QCB Slewing drives are inherently easy to install and require little maintenance, but suitable preparation of the mounting structure is important.

Installation and maintenance

Before installation:-
  1. Check the slew drive for any damage. If you have any concerns contact NBC Technical.
  2. Clean the slew drive using any cold solvent (e.g. diesel oil) and the mounting structure
  3. Ensure eye bolts, straps or chains and adequate lifting apparatus are available.
  4. Remove the shipping bolts


Mounting surface flatness

The permissible horizontal deviation of the mounting surface is tabulated below

Slew drive size

3

5

7

9

12

14

17

19

21

25

Permissible flatness deviation

mm

0.04

0.1

0.1

0.12

0.15

0.26

0.15

0.17

0.2

0.2


Lubrication

QCB Slew drives are supplied pre greased with SINOPEC 7014-1 synthetic grease suitable for an operating temperature range of -40°C to +200°C. The onus rests with the client to ensure the bearings are lubricated during installation.

QCB Slew drives will require lubricant to be applied to the slew ring raceway, the taper roller bearings at each end of the worm shaft, and to the worm gear itself.




Item

7014-1

Test Methods

Appearance

Beige Smooth Buttery

Eye View

Dropping Point °C

≥280

GB/T3498

1/4 Penetration (60 strokes),0.1mm

70

GB/T269

Corrosion Test(T3Cu,100 °C,3h)

Pass

SH/T0331

Apparent Viscosity(-40 °C,10s-1), Pas

683

SH/T0048


Under normal operating conditions (<2rpm; low to medium loads, -30°C to +60°C) it is recommended that the bearings and slew ring raceway are greased as follows:-

Dry, clean industrial workshop

Every 500 hours of operation or 12 months

Wet, dirty environment

Every 250 hours of operation or 6 months

Aggressive conditions or continuous operation

Every 150 hours or 4 months

Extreme conditions

Every 50 hours or 2 months


Consider using the GreaseMax automatic lubricators for continuous “fit and forget” maintenance.

Slew drive size

Quantity of grease to be applied (gr)

3

5

7

9

12

14

17

19

21

25

Raceway

10-15

15-20

30-35

45-50

55-60

70-75

95-100

120-130

140-150

Gear

33-35

50-60

55-65

90-100

100-110

100-110

110-120

110-120

130-140

130-140

Support brgs

7

7

7

10

10

10

10

10

10

10


Compatible greases include:-

ISOFLEX NBU 15; Dow-Corning 44; Mobiltemp SHC 100; Mobiltemp SHC 32; Caltex Unitemp 550

NOTE: QCB stock 380 gr cartridges (MOBIL SHC100 CART) as well as the full range of GreaseMax units prefilled with MOBIL SHC100 (grease code F239)


Bolts

When fitting the slew drive, remove the shipping bolts, and mounting bolts to ISO Grade 10.9 should be used.

If required, ask NBC Technical to check the bolt strength calculation.

Flat washers of the appropriate size and strength may be used to reduce under bolt head pressure. Split or conical washers may not be used.

Metric bolt tightening torques (Nm)

Bolt diameter

Grade 10.9

Grade 12.9 (Cap screws)

M8

33 ± 3

45 ± 6

M10

72 ± 6

90 ± 10

M12

120 ± 10

150 ± 20

M16

305 ± 25

380 ± 50

M18

415 ± 35

521 ± 70

M20

600 ± 50

750 ± 100

Tighten the bolts in a crosswise pattern, first to 30%, then to 50% and finally to 100% of the recommended torque figure. After 100 hours of operation the bolt torques must be checked; thereafter annual inspection should suffice. Mark the position of the tightened bolt head so that later inspection can reveal if it has moved in service.


Seals

QCB Slew drives feature standard NBR rubber seals. These should be checked during maintenance and replaced if they have deteriorated.


Swapping from right hand to left hand drive

QCB slewing drives are usually imported and stocked with the motor mounted on the right hand side If requested we can change the units to left hand motor mount before despatch, but this is easily accomplished in the field.

    1. Remove the 4 bolts holding the end caps onto the main housing.
    2. Remove the end caps., the seals and the taper roller bearings cones.
    3. Gently remove the worm shaft - turning it will assist in this process
    4. Reverse and insert the worm shaft into the housing in the opposite orientation
    5. Replace the taper roller bearing cones and seals. Replace the end caps.
    6. Check rotation by hand.


    Rotation of the slew drive

    QCB Slew drives can be rotated by manual, hydraulic or electrical means.


    MANUAL: The non-drive end of worm shaft has a hexagon head to enable the shaft to be turned manually. Some clients make hand cranks with suitable ends to engage in the drive end.

    We can supply from stock a stub shaft and cover to lock the bearings in place if required. (25mm shafts only)


    HYDRAULIC: Tabulated herewith ADAN motor data for maximum torque at 3 rpm. Other options may be satisfactory depending on the load and speeds required.

    QCB referenceADAN motorPressure (Bar)Flowrate (liters per min)
    WGSE 7AMM 50 P7012
    WGSE 9MSA 125 2M15026
    WGSE 12MSA 125 2 M14032
    WGSE 14MSA 125 2 M14034
    WGSE 17MSA 125 2 M14040
    WGSE 21MSA 150 2 M13064
    WGSE 25MSA 150 2 M14075
    WGWEA 7MSA 100 2 M14023
    WGWEA 9MSA 150 2 M14022
    WGWEA 12MSA 150 2 M14033
    WGWEA 14MSA 150 2 M15036
    WGWEA 17MSA 150 2 M15045
    WGWEA 21 MTAPMTAP 300 M16575
    WGWEA 25 MTAPMTAP 300 M18095


    ELECTRIC: If requested we can supply ROSSIGeared motor units that can be mounted alongside the slew drives.


#

Associated Products


Do you have a special project?

Need some advice? We can help!


oemsales@nbcgroup.co.uk

01952 222300