Advertisement
Quick Links
USA – Tel: (+01) 262-691-3320 • Web: www.harken.com • Email: harken@harken.com
WARNING! 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.
• Twing, tweeker control for code zero sheets
• Can be used as snatch block when combined with soft shackle
• Spinnaker sheet and guy control
Side opening sideplate - Easy to rig and remove from sheet
Spring loaded button release - Quick one-handed rigging
Anti-capsize bar - Keeps sheave aligned on sheet
ULC main bearing - Sheave turns smoothly under extreme loading
Sideload balls - Carry loads especially when block not aligned in light air
Thimble at pivot base - Use 1:1 or 2:1 up-down control
Machined aluminum inner sideplates - High strength, low weight
Soft polyurethane outer sideplate bumpers - Protects block and deck
Main sheave
Aluminum inner
sideplate
Thimble for
rigging 2:1
Part
Description
No.
1 Ton Twing Block
3405
INSTRUCTIONS
One Ton Twing Block, 3405
Italy – Tel: (+39) 031 3523511 • Web: www.harken.it • Email: techservice@harken.it
Release button
Closed position
Sheet max
Ø
line
in
mm
.43
11
Uses
Features
Terms
Sideload balls
Anti-capsize bar
Adjusting nut
Specifications
Up/down max
Ø
line
Weight
in
mm
oz
g
.34
9
1.4
143
1
Open position
G - Maximum
Breaking
working load
load
lb
kg
lb
kg
2205 1000 4409 2000
Polyurethane
outer sideplates
Advertisement
Related Manuals for Harken 3405
Summary of Contents for Harken 3405
- Page 1 One Ton Twing Block, 3405 USA – Tel: (+01) 262-691-3320 • Web: www.harken.com • Email: harken@harken.com Italy – Tel: (+39) 031 3523511 • Web: www.harken.it • Email: techservice@harken.it WARNING! Strictly follow all instructions to avoid an accident, damage to your vessel, personal injury, or death.
- Page 2 Rigging Options Sheet Up-down control line 1:1 up-down control 2:1 up-down control Splice or knot to thimble Use a control line around at pivot base. thimble at pivot base. Hold the block in one hand and use your index finger to press the release button. Load onto sheet. Close and latch the sideplate.
- Page 3 Use (continued) If sheet is larger than 5/16" (8 mm) remove the anti-capsize bar to allow a larger sheet to be used. Removing anti-capsize bars The anti-capsize bar can also be removed if the up-down control is 1:1 and a spliced eye is used, thus avoiding capsizing.
- Page 4 Note: Spin sheave to distribute soap solution into sideload balls and main bearing evenly. Open and close sideplate. Flush with fresh water. Do not use lubricants in sheave. Warranty For additional safety, maintenance, and warranty information see www.harken.com/manuals or the Harken catalog. M1034 01-24...
Need help?
Do you have a question about the 3405 and is the answer not in the manual?
Questions and answers