Harken 340-2 User Manual
INSTRUCTIONS
29 mm Carbo AirBlock
All blocks except 351 Ti-Lite
USA – Tel: (+1) 262-691-3320 • Web: www.harken.com • Email: harken@harken.com
Italy – Tel: (+39) 031.3523511 • Web: www.harken.it • Email: techservice@harken.it
Strictly follow all instructions to avoid an accident, damage to your vessel, personal injury
or death. See www.harken.com/manuals for additional safety information.
IMPORTANT: See Inspection and Maintenance at end of manual.
Features
Glass-filled nylon sideplates: load-carrying curved bearing races.
Single fixed: Integral becket allows 2:1 or 3:1 purchase.
C
Doubles/triples: U-Locks holds the swivel in front/side position, or lets
block spin freely.
Triple w/cam: Compact cam arm supports high-load purchases of 5:1 or 6:1.
Cheek: Line-shedding, small mounting footprint and drain holes.
Common uses: Outhauls, Cunninghams, Vangs, Traveler controls,
Barberhaulers, Flag halyards
B
Max Line Size: Blocks w/o Cams 5/16" (8 mm); Blocks w/Cams 1/4" (6 mm)
®
A
Do not apply a load greater than the Maximum working load (MWL) of the Carbo AirBlock listed below.
Part
No. Description
340 Single/swivel 1
341 Single/swivel/becket 1
342 Double/swivel 1
343 Double/swivel/becket 1
344 Triple/swivel 1
345 Triple/swivel/becket 1
346 Triple/423 Carbo-Cam
347 Triple/423 Carbo-Cam
®
** 11/829 27/8733/165 750 340 1500 680 072
®
/becket** 11/829 33/8853/165 900 408 1800 816 072
348 Single/fixed* 1
349 Stand-up/fixed* 1
350 Cheek 1
351 Ti-Lite* Important: Consult instruction sheet at: http://www.harken.com/pdf/4927.pdf
352 90° Fixed head* 1
353 Traveler 1
371 Clew block assembly 1
381 Double/fixed 1
A B C
1
/829 25/8665/324 330 150 1000 454 246
1
/829 31/16785/324 330 150 1000 454 246
1
/829 27/8733/165 660 299 1625 737 072
1
/829 33/8853/165 660 299 1625 737 072
1
/829 27/8733/165 990 449 2000 907 072
1
/829 33/8853/165 990 449 2000 907 072
1
/829 115/1649 — — 330 150 1000 454 —
1
/829 23/1656 — — 330 150 1000 454 —
1
/829 2
1
/829 21/1652 — — 330 150 1000 454 —
1
/829 35/892 — — 330 150 1000 454 —
1
/829 47/8124 — — 330 150 1000 454 —
1
/829 21/854 — — 660 299 1625 737 —
1/
8
53 — — 330 150 1000 454 —
working load
*Can be used as becket block **Maximum working loads and breaking loads for blocks based on cam strengths
Maximum
Breaking
load
Harken
Shackle
Part No.in mm in mm in mm lb kg lb kg
350 Cheek Block
5:1 Right-Angle Reeving
Dead-end on Becket
4:1 Right-Angle Reeving
Dead-end on Becket
6:1 Right-Angle Reeving
Dead-end on becket
Using block as template, mark holes using a centerpunch. Remove block and
drill holes using a
knife to allow sealant to mass. Through-bolt block using recommended
stainless steel fasteners, washers and locknuts.
Part
No. Fasteners
350
350 M4 or #8 PH/RH* — — 1
B
*Fastener length: Add deck thickness and overhang for nut and washer.
11
/64" (4.2 mm) drill. Bevel top of deck holes using a small
A B C
in mm in mm in mm
349 Stand-Up
Using eyestrap as template, mark holes using a centerpunch. Remove block
and drill holes using a
knife to allow sealant to mass. Through-bolt using recommended stainless
steel fasteners, washers and locknuts.
A
B
C
11
/64" (4.2 mm) drill. Bevel top of holes using a small
Part
No. Fasteners
349 M5 or #10 PH/RH
*Fastener length: Add deck thickness and overhang for nut and washer.
3-Way U-Lock—342 / 343 / 344 / 345 / 346 / 347 / 381
The 3-Way U-Lock allows a change of headpost direction from
front to side or allows the block to swivel. To change headpost
direction, remove shackle, turn post, install shackle. Remove
U-Lock to allow block to swivel.
3
/1630 — —
A B C
in mm in mm in mm
7
/1611 11/432 111/1643
Integral Becket—348 / 352
Deadend line at mouth to construct a 2:1 or 3:1 system.
Reeving Multi-Purchase Systems
2
4
3
4:1
Right-angle reeving
dead-end on becket
4
1
Right-angle reeving
dead-end on becket
5:1
5
For larger, printable diagrams, please see: www.harken.com.
5
1
2
6
4
3
Right-angle reeving
6:1
dead-end on becket
6
1
2
5
4
3
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