Slew Drive Installation

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

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Product Overview

Installation and maintenance

Before installation:-

Check the slew drive for any damage. If you have any concerns contact NBC Technical.
Clean the slew drive using any cold solvent (e.g. diesel oil) and the mounting structure
Ensure eye bolts, straps or chains and adequate lifting apparatus are available.
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)
Slew drive size	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.

Remove the 4 bolts holding the end caps onto the main housing.
Remove the end caps., the seals and the taper roller bearings cones.
Gently remove the worm shaft – turning it will assist in this process
Reverse and insert the worm shaft into the housing in the opposite orientation
Replace the taper roller bearing cones and seals. Replace the end caps.
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 reference	ADAN motor	Pressure (Bar)	Flowrate (liters per min)
WGSE 7	AMM 50 P	70	12
WGSE 9	MSA 125 2M	150	26
WGSE 12	MSA 125 2 M	140	32
WGSE 14	MSA 125 2 M	140	34
WGSE 17	MSA 125 2 M	140	40
WGSE 21	MSA 150 2 M	130	64
WGSE 25	MSA 150 2 M	140	75

WGWEA 7	MSA 100 2 M	140	23
WGWEA 9	MSA 150 2 M	140	22
WGWEA 12	MSA 150 2 M	140	33
WGWEA 14	MSA 150 2 M	150	36
WGWEA 17	MSA 150 2 M	150	45
WGWEA 21 MTAP	MTAP 300 M	165	75
WGWEA 25 MTAP	MTAP 300 M	180	95

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

Enquire Now About Slew Drive Installation

For any enquiries regarding Slew Drive Installation, please complete our enquiry form, and a member of our technical team will respond promptly. Alternatively, you can reach out directly to one of our offices using the contact details here. Our specialists are ready to provide guidance and support tailored to your machinery and engineering needs.