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1251 E. Wisconsin Avenue • Pewaukee, WI 53072 USA

Tel: 262-691-3320, Fax: 262-691-3008 • Web: www.harken.com, Email: [email protected]

WARNING! Strictly follow all instructions to avoid an accident, damage to your vessel, per-

sonal injury, or death. See www.harken.com for additional safety information.

Part 

No.

Description

Sheave Ø

Max line Ø

Maximum working load

Breaking load

in

mm

lb

kg

lb

kg

2146

29 mm

29 mm

5

/

16

8

330

150

1000

454

2149

40 mm

40 mm

3

/

8

 

10

485

220

1200

544

2152

57 mm

57 mm

7

/

16

10

792

359

2380

1080

Specifications

Planning Installation

WARNING! Lashing to objects with sharp edges can cause line to chafe and break suddenly 

when load is applied.

Using Alternate Line, Knots, and Splices

Harken is not liable or responsible for use of line used to secure blocks. Go to Harken General Warnings 

at www.harken.com for complete details. It is your responsibility to choose the correct line for the block. 

When choosing line, use a breaking load that is at least double the block's breaking load to account 
for strength loss from:

1. Knots slipping or breaking much lower than line breaking load. Spectra

®

 or Dyneema

®

-type 

  lines require specialized knots.

2. Splices slipping or failing due to the incorrect type or execution.

3. UV damage increasing with each passing year.

4. Chafing seriously reducing strength.

If you are not comfortable choosing line, work with a qualified rigger. Go to www.harken.com/manuals for 

additional information.

WARNING! Improper knots or splices can weaken the block installation causing it to break 

suddenly when load is applied.

WARNING! Failure to account for loss of strength due to chafe or UV damage when choosing 

line can result in line breaking suddenly when load is applied.

Harken

®

 equipment is designed for minimal maintenance. However, some upkeep is required to give 

the best service and comply with the Harken

®

 limited warranty.

Keep your equipment clean and free-running by frequently fl ushing with fresh water. Periodically 

clean with mild detergent and water solution. Spin sheaves to distribute soap solution evenly

Flush with fresh water.

Important: 

Exposure to some teak cleaners and other caustic solutions can result in discoloration 

of part and is not covered under the Harken warranty. 

Warranty

For additional safety, maintenance, and warranty information see www.harken.com or the Harken

®

 

catalog.

Maintenance

Terms

Bail

Head

Mouth

Lashing Strands

Laps

Sheave

2. Always lash to mouth of the block. Head is not strong enough to secure line.

WARNING! Lashing to head of block seriously weakens the block. This will cause the block 

to break suddenly when load is applied.

Additional Information

For additional information, including use of block mouth as a becket, go to online manual 4370 at 

www.harken.com/manuals.

Lashing Line Minmum Breaking Load 

Part  No.          2146 (29 mm)

2149 (40mm)

2152 (57mm)

Strands

lbs

kg

lbs

kg

lbs

kg

1

2000

907

2400

1088

4760

2159

2

1000

454

1200

544

2380

1079

3

667

302

800

363

1587

720

4

500

227

600

272

1190

540

5

400

181

480

218

952

432

6

333

151

400

181

793

360

7

286

130

343

155

680

308

8

250

113

300

136

595

270

9

222

101

267

121

529

240

10

200

91

240

109

476

216

Six (6) 

Strands 

Read important information on choosing line, knots, and splices. Go to US Sailing article: 

http://offshore.ussailing.org/Assets/Offshore/SAS/PDF/Article.pdf

Go to online manual at www.harken.com/manuals for link.

Printed in USA    4368  10-26-11

I N S T R U C T I O N S

Patent Pending

Do not lash through block 

head.

Head

Do not lash through block 

head.

Head

Mouth

1. Lash only to objects with rounded edges. Avoid sharp corners.

Rounded

Sharp

Sideplate

4368-10--03-11.indd   1

10/26/2011   12:18:12 PM

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