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Blocks and Sheaves

Environmental Monitoring & Research Equipment

(305) 621-2882

[email protected]

Blocks and Sheaves

General Oceanics blocks are designed to make your cable last.

Available sizes: .5M, 1M, 1.5M, 2M (sheave circumference)

  • Increase Wire Rope Endurance Life
  • Reduce Weight
  • Corrosion Resistant

NYLATRON sheaves reduce crown and cable wear. Weight is one seventh (1/7) the weight of equivalent sized sheaves. NYLATRON is a high strength cast nylon containing fine particles of molybdenum disulfide (MoS2), a solid lubricant; the increased lubricity aids in extending cable life.
COUNTERBALANCING keeps the sheave coplanar with the cable regardless of ship roll, pitch, and yaw under trawling/towing operations.
Available configurations: Counterbalanced, fairlead (non-counterbalanced) for reduced overall weight and height. Instrumented blocks are used to provide remote reading of cable payout and rate.

Meets the requirements of “Handbook of Oceanographic Winch,

Wire and Cable Technology” by Alan H. Driscoll.


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Block, Snatch Aluminium 14" ID Instumented

Block, Snatch Aluminium 14" ID Instumented

Part Number: SR-16I

$ 3490.00

Block,Smart,Snatch,Aluminium,12"ID Instrumented

Block,Smart,Snatch,Aluminium,12"ID Instrumented

Part Number: SR-12I

$ 3070.00

Counter Wire

Counter Wire

Part Number: EWC-6

$ 1850.00

Readout, Hydroblock

READOUT,HYDROBLOCK READOUT FOR 4000 SERIES BLOCKS, CABLE OUT METERS, Cable in/out display (Derived from Solid-state hall-effect magnetic sensors from block.) " Cable rate display (Derived by display microprocessor from cable in/out data.) " Wire tension display (when interfaced to a wire tension measurement device) " Cable in warning alarm (User defined) " 4 hour battery only operation " Operates on either 110 or 240 VAC, 50 or 60 Hz " Water proof housing and connectors " Computer interface capability (RS-232 or USB-serial converter) " Data recording capability " Selectable input capability for different hydro wire diameter sizes. " On board memory back-up " Real time clock " LED digits - legible in full sunlight " Operating range -25 C to +70 C " Max. cable length displayed: 9999 meters. Least significant figure displayed: one meter. " Max. lowering and hauling rate alarm, user defined. " Output 5 VDC " Readout weight: 6 pounds (2.722 kilograms) " Readout Size: 7.5 inch diameter (19.05cm) X 3.5 inch (8.89cm) high including mtg. plate. " Maximum wire payout Rate 175 meters per minute.

Part Number: 4050

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Block Nylatron Counterbalanced, .5M

Block Nylatron Counterbalanced, .5M

LIGHT DUTY LOAD RATING OF 6,600 lbs. BENDING RADIUS OF 3.13" (7.95cm).
Instrumented for use with 4050 Remote display.

Part Number: 4040-.5I

$ 11152.00

BLOCK NYLATRON COUNTERBALANCED,.5M

BLOCK NYLATRON COUNTERBALANCED,.5M

LIGHT DUTY LOAD RATING OF 6,600 lbs. BENDING RADIUS OF 3.13" (7.95cm).

Part Number: 4040-.5

$ 9241.00

BLOCK NYLATRON COUNTERBALANCED,.5M

BLOCK NYLATRON COUNTERBALANCED,.5M

LIGHT DUTY, LOAD RATING OF 6,600 lbs. BENDING RADIUS 3.13" Wide sheave

Part Number: 4040-.5W

$ 11540.00

Block, Fairlead Non-Counterbal., .5M

Block, Fairlead Non-Counterbal., .5M

ONE HALF METER CIRCUM, FAIRLEAD BLOCK 6600 LBS SWL, UP TO .312" WIRE DIA. NYLATRON SHEAVE,SEALED BEARING, WEIGHT 28 lbs (13kg). 19"x11"x5"

Part Number: F4040-0.5

$ 7197.00

BLOCK,FAIRLEAD NONCOUNTERBAL.5M WIDE

BLOCK,FAIRLEAD NONCOUNTERBAL.5M WIDE

LIGHT DUTY, LOAD RATING OF 6,600 lbs. BENDING RADIUS 3.13"

Part Number: F4040-0.5W

$ 10406.00

Block Nylatron Counterbalanced, .5M Instrumented Wide

Block Nylatron Counterbalanced, .5M Instrumented Wide

LIGHT DUTY, LOAD RATING OF 6,600 lbs. BENDING RADIUS 3.13" Wide sheave
Instrumented

Part Number: 4040-.5WI

$ 13431.00

Block, Fairlead Noncounterbal .5M

Block, Fairlead Noncounterbal .5M

ONE HALF METER CIRCUM, FAIRLEAD BLOCK 6600 LBS SWL, UP TO .312" WIRE DIA. WIDE NYLATRON SHEEVE,SEALED BEARING, INSTRUMENTED

Part Number: F4040-.5WI

$ 11391.00

BLOCK,FAIRLEAD NONCOUNTERBAL.5M INSTRUMENTED

BLOCK,FAIRLEAD NONCOUNTERBAL.5M INSTRUMENTED

ONE HALF METER CIRCUM, FAIRLEAD BLOCK 6600 LBS SWL, INSTRUMENTED, UP TO .312" WIRE DIA. NYLATRON SHEEVE,SEALED BEARING, WEIGHT 28 lbs (13kg).

Part Number: F4040-0.5I

$ 9973.00

Block Nylatron Counterbalanced , 1M

BLOCK NYLATRON COUNTERBALANCED ,1M sheave Diameter .32m (12.5")Bending radius .16m (6.26")

Part Number: 4041-1

$ 11578.00

Block Nylatron Counterbalanced, 1M

Block Nylatron Counterbalanced, 1M

Part Number: 4041-1I

$ 12206.00

Block Nylatron Counterbalanced, 1M Wide

Block Nylatron Counterbalanced, 1M Wide

Part Number: 4042-1W

$ 16734.00

Block Smart, Snatch Aluminium 12" Id

Block Smart, Snatch Aluminium 12" Id

Part Number: SR-12

$ 1220.00

Block, Snatch Aluminium 14" Id

Block, Snatch Aluminium 14" Id

Part Number: SR-16

$ 1150.00

BORE HOLE WIRE COUNTER, MECHANICAL

BORE HOLE WIRE COUNTER, MECHANICAL

Portable meter to measure length of cable down a bore hole. Bolts to bore hole collar, can swivel out of the way for hole access, 10cm accuracy.

Part Number: MWC-2

$ 2495.00

PAYOUT AND SPEED INDICATOR

PAYOUT AND SPEED INDICATOR

Part Number: DTPOS

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SHEAVE, COUNTER

SHEAVE, COUNTER

Part Number: PS06

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Block Nylatron Counterbalanced, 1M Instrumented

Block Nylatron Counterbalanced, 1M Instrumented

Part Number: 4042-1I

$ 15725.00

Block Nylatron Counterbalanced, 1M, Wide Sheave

BLOCK NYLATRON COUNTERBALANCED,1M, WIDE SHEAVE sheave Diameter .32m (12.5")Bending radius .16m (6.26")

LIGHT DUTY, WIDE SHEAVE, LOAD RATING OF 6,600 lbs. BENDING RADIUS 6.26" (15.9cm).

Part Number: 4041-1W

$ 13644.00

Block Nylatron Counterbalanced, 1M Wide Sheave, Instrumented

Block Nylatron Counterbalanced, 1M Wide sheave

LIGHT DUTY, WIDE SHEAVE, LOAD RATING OF 6,600 lbs. BENDING RADIUS 6.26" (15.9cm). Wide Sheave , Instrumented

Part Number: 4041-1WI

$ 15148.00

Block, 1M, Fl, Hd, Narrow, Instr.

Block, 1M, Fl, Hd, Narrow, Instr.

Part Number: F4042-1I

$ 15522.00

Block, Fairlead 1M Instrumented

Block, Fairlead 1M Instrumented

Part Number: F4041-1I

$ 10390.00

Block, Fairlead, 1.5M, Instrumented, Heavy Duty

Block, Fairlead, 1.5M, Instrumented, Heavy Duty

NARROW SHEAVE, HEAVY DUTY 17,600 LB SWL MAX WIRE DIAMETER 16MM (0.63")

Part Number: F4044-1.5I

$ 19388.00

BLOCK,FAIRLEAD NON-COUNTERBAL.,1M

BLOCK,FAIRLEAD NON-COUNTERBAL.,1M

Part Number: F4041-1

$ 8443.00

Block, Fairlead Non Counterbal., 1M Wide

Block, Fairlead Non Counterbal., 1M Wide

Part Number: F4042-1W

$ 14578.00

Block, Fairlead Non-Counterbal., 1M

Block, Fairlead Non-Counterbal., 1M

HEAVY DUTY. LOAD RATING OF 17,600 LBS MAX. WIRE DIAMETER OF .625",BENDING RADIUS OF 6.26" (15.9cm) Weight 98 lbs (45kg) L 28"(71cm)x W17(43cm)"x D 7.75" (20cm)

Part Number: F4042-1

$ 13634.00

Block, Fairlead Non-Counterbal., 1M Wide Sheave

Block, Fairlead Non-Counterbal., 1M Wide Sheave

Part Number: F4041-1W

$ 11480.00

BLOCK,FAIRLEAD NON-COUNTERBAL., 1M WIDE SHEAVE, INSTRUMENTED

BLOCK,FAIRLEAD NON-COUNTERBAL., 1M WIDE SHEAVE, INSTRUMENTED

Part Number: F4041-1WI

$ 12953.00

Block Nylatron Counterbalanced, 1M

Block Nylatron Counterbalanced, 1M

HEAVY DUTY. LOAD RATING OF 17,600 LBS MAX. WIRE DIAMETER OF .625",BENDING RADIUS OF 6.26" (15.9cm)

Part Number: 4042-1

$ 15642.00

Block Nylatron Counterbalanced, 1M

Block Nylatron Counterbalanced, 1M

WIDE SHEAVE, HEAVY DUTY 17,600 LB SWL , MAX WIRE DIA. 16MM (0.63"), Bending Radius 6.26" (15.9cm). Instrumented for use with 4050 readout.

Part Number: 4042-1WI

$ 18314.00

Block, 1.5 Meter, Counter-Balanced, Narrow Sheave

Block, 1.5 Meter, Counter-Balanced, Narrow Sheave

NARROW SHEAVE, HEAVY DUTY 17,600 LB SWL MAX WIRE DIAMETER 16MM (0.63") Bending Radius 9.37" (23.8cm). L 45"(115) W 12.5" (32) H 9.5" (24cm) 240 lbs (110kg)

Part Number: 4044-1.5

$ 19151.00

Block, 1.5M, Hd, Cbal, Narrow, Instr.

Block, 1.5M, Hd, Cbal, Narrow, Instr.

NARROW SHEAVE, HEAVY DUTY 17,600 LB SWL MAX WIRE DIAMETER 16MM (0.63") Bending Radius 9.37" (23.8cm). L 45"(115) W 12.5" (32) H 9.5" (24cm) 240 lbs (110kg)
FOR USE WITH MODEL 4050 READOUT

Part Number: 4044-1.5I

$ 21258.00

BLOCK NYLATRON COUNTERBALANCED 1.5M WIDE

BLOCK NYLATRON COUNTERBALANCED 1.5M WIDE

G.O.' NYLATRON SHEAVE, LIGHT DUTY COUNTERBALANCED BLOCK FOR LOAD RATING OF 6600 LBS. WITH MAXIMUM WIRE DIAMETER OF 8MM. Bending radius 9.37" (23.8cm) DESIGNED TO MEET THE PROPOSED SPEC'S BY NIO FOR .322 WIRE REQUIREMENTS H 36.5" (93cm) Width 23" (58cm), thickness 5" (3 cm)

Part Number: 4043-1.5W

$ 19151.00

Block Nylatron Counterbalanced 1.5

Block Nylatron Counterbalanced 1.5

Part Number: 4043-1.5I

$ 17972.00

Block Nylatron Fairlead 1.5M Wide Sheave

BLOCK NYLATRON FAIRLEAD 1.5M WIDE SHEAVE

Part Number: F4043-1.5W

$ 17442.00

Block, Counterbalanced 1.5 Meter Instrumented

Block, Counterbalanced 1.5 Meter Instrumented

Part Number: 4044-1.5WI

$ 24343.00

Block, Fairlead 1.5 Narrow Sheave Nylatron

BLOCK, FAIRLEAD 1.5 NARROW SHEAVE NYLATRON FAIRLEAD BLOCK WITH NYLATRON SHEAVE FOR LIGHT DUTY RATING OF 6600 LBS. MAXIMUM WIRE DIAMETER .312" Weight 70 lbs (32kg) sheave Diameter .48m (18.75")Bending radius .24m (9.39")

Part Number: F4043-1.5

$ 14046.00

Block, Fairlead 1.5M Instrumented Narrow Sheave

Block, Fairlead 1.5M Instrumented Narrow Sheave

Part Number: F4043-1.5I

$ 15849.00

Block, Fairlead 1.5M Wide Sheave Instrumented

Block, Fairlead 1.5M Wide Sheave Instrumented

Part Number: F4043-1.5WI

$ 18916.00

Block, Fairlead 1.5 Meter (Narrow Sheave)

Block, Fairlead 1.5 Meter (Narrow Sheave)

HEAVY DUTY 17,600 LB SWL MAX WIRE DIAMETER 16MM (0.63") Bending Radius 9.37" (23.8cm) L 51"(130cm) W 29.5" (75cm) H 9.5" (24cm) 485 lbs (220kg)

Part Number: F4044-1.5

$ 17265.00

Block, Fairlead 1.5 Meter (Wide Sheave)

Block, Fairlead 1.5 Meter (Wide Sheave)

Part Number: F4044-1.5W

$ 20319.00

BLOCK NYLATRON COUNTERBALANCED 1.5M

BLOCK NYLATRON COUNTERBALANCED 1.5M

Part Number: 4043-1.5

$ 16084.00

Block Nylatron Counterbalanced 1.5M Wide Instrumented

Block Nylatron Counterbalanced 1.5M Wide Instrumented

Part Number: 4043-1.5WI

$ 20673.00

Block, 1.5M, Hd, Fairlead, Wide, Instr.

Block, 1.5M, Hd, Fairlead, Wide, Instr.

Part Number: F4044-1.5WI

$ 22207.00

Block, Counterbalanced 1.5 Meter

Block, Counterbalanced 1.5 Meter

Part Number: 4044-1.5W

$ 22220.00

Block Nylatron Counterbalanced, 2M

Block Nylatron Counterbalanced, 2M

Part Number: 4043-2I

$ 19435.00

Block Nylatron Counterbalanced, 2M

BLOCK NYLATRON COUNTERBALANCED,2M G.O.' NYLATRON SHEAVE, LIGHT DUTY COUNTERBALANCED BLOCK, WIDE SHEAVE, FOR LOAD RATING OF 6600 LBS. SWL WITH MAXIMUM WIRE DIAMETER OF 8MM. Bending radius 12.53 (31.8cm)

Part Number: 4043-2W

$ 20449.00