Introduction of Suga’s Shellook hydraulic cranes used on scallop farm vessels, oyster farm vessels, and small stationary vessels.

We, Suga, are engaged in the design, manufacture, and sales of shellac hydraulic cranes all at once.

There are 3 types, Shellook 300, Shellook 500 and Shellook 500A which is widely used in scallop and oyster farming vessels, as well as small stationary vessels.

In particular, the Shellook 300 is smaller than other companies’ products and is used on many small vessels.

Stainless steel parts & corrosion-resistant zinc plating achieves durability.

Product information of our Shellook hydraulic cranes.

Shellook hydraulic cranes are developed for marine use

They feature a robust structure to cope with loads that cannot be expected on land due to wave effects.

For additional corrosion resistance, the body is hot-dip galvanized and, as for the cylinder rod, it is either stainless steel rod or double hard chrome-plated.

Three types are available with hoisting capacities of 300 kg and 500 kg, and with automatic or semi-automatic booms, and are widely used on scallop and oyster farming vessels, as well as on small stationary vessels.

Standard specifications of our Shellook hydraulic cranes

Specification table

External view of Shellook

※Specially made mounting bases for each model are also available.

Main formulae for hydraulic equipment

hydraulic pump
Shaft input of pump	Ls=(P･Q/60η)･102
Oil power of the pump	Lp= P･Q/60＝η･Ls・10-2
Total efficiency of pump	η=ηv･ηt・10-2
Volumetric efficiency of the pump	ηv=(Q/Qth)･100≒(Q/Q0)･100
Efficiency of prime mover	ηe= Ls/ Le

hydraulic motor
Theoretical push-off volume of hydraulic motors	Dth=(2π･T)/(P･ηt)･102
Output power of hydraulic motors	Ls=2π･T･N/60000=η･(P･Q/60)･102
Input power of hydraulic motors	Lm=P･Q/60
Volumetric efficiency of hydraulic motors	ηv= (Dth･N/Q)･10-1
Torque efficiency of hydraulic motors	ηt= (2π･T/P･Dth )･102
Total efficiency of hydraulic motors	η=ηv･ηt･102= (Ls/ Lm)･102=(2π･T･N/P･Q)･10-1

Cylinder
Pressure required for cylinder.	P1=(1/ A1)･(F/ηc+P2･A2･102) ･10-2
Required flow rate for cylinder	Q= A1･v･10-1+QL
Thrust of the cylinder	・Acceleration【F1=m･α=m･v1/t】 ・static friction resistance【F2= μs･m･g】 ・dynamic frictional resistance【F3= μd･m･g】

Symbol Description

Repair and modification of our shellook hydraulic cranes.

Overhauls and repairs can be performed at our factory.
We also sell parts for undulating cylinders and telescopic cylinders.

Please feel free to contact us.