Slewing drive power

QCB Slewing Drives can be powered by hydraulic, electric or even air-powered motors. 

QCB can specify and supply a wide range of hydraulic, electric and servo motors.

Worm gear slew drives with efficiency <50% are generally self-locking, but this can be cancelled by external excitation or vibration and should not be relied upon to act as a brake. QCB recommends that all drives are fitted with braked motors.

Starting torque can be higher than operating torque (due to stiction in the gearing and seals) and we recommend adding 20% to your calculations to compensate for this.

An application factor ranging from 1.1 to 2.0 should also be applied depending on the type of rotatory movement, duty cycle and shock loading.

Hydraulic power

Most QCB Slewing Drives are imported in right hand drive form to accept an SAE 2-bolt hydraulic 25mm output motor. There are exceptions, but in some cases the end cap can be changed to suit other motor outputs.

A range of hydraulic motors, braked hydraulic motors with pressure relief and/or overcenter valves can be supplied.

Right hand stock units can be converted to left hand units before despatch.

Email QCB Technical for advice

16mm End caps
25mm End caps

Some of the different end caps designs available

Electric power

A suitably sized gearbox can be mounted to a QCB Slewing drive by means of a locally manufactured adapter flange and shaft extension.

This is useful for small volume or short delivery requirements.

For volume orders, or in cases where the client wishes to supply their own gearmotor, it may be possible to adjust the housing design and worm shaft ends before manufacture.

Email QCB Technical for advice.

Calculation of input power requirements

 

To calculate the input torque and speed you need follow these simple calculations:-

Required input motor speed = load speed x reduction ratio

Required input motor torque = Load torque/Speed ratio/0.4

e.g. Assume you are using a WGSE 14 85 25 H R slew drive and you have a load torque of 5400 Nm you wish to slew at 1.5 rpm

Motor speed = 1.5 x 85 = 127.5 rpm;  Motor torque = 5400/85/0.4 = 158.8 Nm

A suitable hydraulic motor or electric geared motor can now be selected. 

(If you don’t know how to work out your load torque, ask us for help!)

More examples:-

Slew DriveMotor detailsMotor details
Basic Slew DriveOutput torqueRatioLoad speedMax speed &
Max torque
PressureFlow rate1/2 Speed &
1/2 Torque
PressureFlow rate
Nmrpmbarlpmbarlpm
WGSE 3C ##140062:12AMM 32-P456AMM 32 P255
WGSE 5A ##160062:12AMM 50-P457AMM 32 P305
WGSE 7 ##1150073:13AMM 50-P8512AMM 50 P4512
WGSE 9650061:13MSA 150 2M13035AWMP 125 MX7526
WGSE 12750078:13MSA 150 2M12040AWMP 125 MX8030
WGSE 14800085:13MSA 150 2M12044AWMP 125 MX8035
WGSE 1710000102:12.5MSA 150 2M12045AWMP 125 MX8038
WGSE 2115000125:12MSA 150 2M15045AWMP 125 MX10050
WGSE 2518000150:12MSA 150 2M15050AWMP 125 MX10055

 

Slew DriveMotor detailsMotor details
Basic Slew DriveOutput torqueRatioLoad speedMax torque &
Max speed
PressureFlow rate1/2 Speed &
1/2 torque
PressureFlow rate
Nmrpmbarlpmbarlpm
WGWEA 7350047:12.5MSA 125-2M11516MSA 125 2M5515
WGWEA 9800062:12.5MSA 150-2M15028MSA 125 2M10022
WGWEA 12950079:13MSA 150-2M15035MSA 125 2M9025
WGWEA 141080086:12.5MSA 200-2M12545MSA 125 2M9528
WGWEA 1712900104:13MSA 200-2M12555MSA 150 2M12030
WGWEA 191850094:12MSA 300-2M12062MSA 150 2M13532
WGWEA 212870090:12MTAP 400-P15060MTAP 300 P9545
WGWEA 2534200104:11.5MTAP 500-P12585MTAP 300 P9553

 Over Center Valves:  AWMP motors use an OCV15W; MSA motors use the OCV25S

 

 

Enquiry form & selection advice

To allow us to assist you please download the Enquiry Form which can be filled in manually or on screen and return it to info@qcbslewingrings.com 

QCB Technical will rapidly evaluate your requirement, suggest a solution and quote with relevant CAD and STP files to minimise the time you spend on design.

 

Not sure what you need? Contact us and we will advise a solution based on your needs and budget!
Take advantage of our experience!

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