Marine Capstan

Marine Capstan

Marine Capstan Introduction

A marine capstan is a type of mechanical device used on boats and ships to help control and manipulate ropes and cables. It consists of a vertical or horizontal drum that rotates and winds up the ropes or cables as they are pulled. The capstan is powered by a motor or manually by a team of sailors turning a crank handle. The main purpose of a marine capstan is to provide a mechanical advantage, making it easier to control heavy loads and perform tasks such as raising and lowering sails, dropping and retrieving anchors, and docking the vessel. Capstans have been used on ships for centuries and remain an important part of modern maritime equipment.

According to the application and working condition, the marine capstan can be made from cast steel and 316L stainless steel. From the design stage to dispatch, our internal quality assurance systems fully comply with marine class standard. In addition, third- party surveyors will check the process of  design and fabricating to ensure the marine capstan complies with all relevant specifications.

For more marine capstan specifications,please click here.

Features

1. Electric drive, hydraulic drive.

2. Working load from 5KN to 250KN.

3. Chain diameter from 12.5mm to 160mm, chain grade from AM2 to AM3.

4. Easy for maintenance, lubrication and inspection.

5. High strength construction, high efficiency gearbox.

6. Can be designed and manufacture to suit customers applications and special operating requirements.

7. With or without gypsy wheel.

8. Vertical or horizontal.

9. Local control or remote control.

10. Manual or hydraulic clutch and brake.

11. General motor or explosion-proof motor.

12. Certificate: BV, LR, RINA...

Structure of Marine Capstan

Marine Capstan Classification

Marine Capstan Classification
Marine Electric Capstan	Marine Hydraulic Capstan

Main Technical Parameters

Warping load (KN)	Warping Speed (m/min)	Chain Diameter (mm)	Anchor Speed (m/min)	Working load (KN)	Motor Power (KW)
5	≥9	φ12.5	≥9	6.6	2.2/0.75
6	≥9	φ14	≥9	8.3	2.2/0.75
8	≥9	φ16	≥9	10.9	2.2/0.75
10	≥9	φ17.5	≥9	13.0/14.6	3/1.3
10	≥9	φ19	≥9	15.3/17.2	4.3/1.7
15	≥9	φ20.5	≥9	17.9/20.0	4.3/1.7
15	≥9	φ22	≥9	20.6/23.0	6/2.5
20	≥9	φ24	≥9	24.5/27.4	8.5/3.5
20	≥9	φ26	≥9	28.7/32.1	8.5/3.5
25	≥9	φ28	≥9	33.3/37.2	8.5/3.5
30	≥9	φ30	≥9	38.3/42.8	11/11/7.5
30	≥9	φ32	≥9	43.5/48.6	11/11/7.5
40	≥9	φ34	≥9	49.1/54.9	16/16/11
40	≥9	φ36	≥9	55.1/61.6	16/16/11
50	≥9	φ38	≥9	61.4/68.9	16/16/11
60	≥9	φ40	≥9	68.0/76.0	22/22/16
60	≥9	φ42	≥9	75.0/83.8	22/22/16
70	≥9	φ44	≥9	82.3/92.0	22/22/16
80	≥9	φ46	≥9	89.9/100.5	30/30/22
80	≥9	φ48	≥9	97.5/100.5	30/30/22
90	≥9	φ50	≥9	106.3/118.8	30/30/22
100	≥9	φ52	≥9	114.9/128.4	30/30/22
Above specifications only for reference, We can supply various capstan according to your requirements.

Marine Capstan in Factory

Images of Marine Capstan

How Does A Capstan Work?

Marine capstans are typically powered by an electric motor or a hydraulic system, which rotates the capstan drum to wind or unwind the line or rope. Here is a general overview of how a marine capstan works:

1)Preparation: Before using the capstan, the crew will prepare the line or rope by attaching it to the capstan drum and making sure it is properly secured.

2)Powering up: The electric motor or hydraulic system is then powered up, which turns the capstan drum.

3)Pulling the line: As the drum rotates, the line or rope is wound around it. The crew can control the speed and direction of the drum using a control system, allowing them to pull the line in or let it out as needed.

4)Holding the line: Once the line is in the desired position, the crew can use the capstan's holding brake to prevent the line from slipping or unwinding.

5)Releasing the line: When it's time to release the line, the crew can reverse the direction of the capstan drum, allowing the line to unwind from the drum.

Overall, the operation of a marine capstan is relatively simple, but it requires skill and experience to use it safely and effectively. The capstan's control system and holding brake are essential features that allow the crew to control the line and prevent accidents.

How To Choose The Marine Capstan?

Because the marine capstan is a customized product, different marine capstan manufacturers have different types. In order to provide you with a correct quotation, please kindly provide the following basic parameters:

1. Is it used for mooring or anchoring?

2. Do you need a vertical capstan or horizontal capstan?

3. Rated load or pull force:

4. Rope/chain diameter and drum capacity (mm×m):

5. Rated speed:

6. Driven type (electric/hydraulic):

7. Voltage, frequency and phrase:

8. What is the purpose and working environment of the marine capstan?

9. Will you use it on the deck or on the shore?

10. Do you have any other special requirements?