INSTRUCTIONS
Protexit
™
Blocks
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.
USA
–
Tel:
(+01) 262-691-3320 •
Web:
www.harken.com •
Email:
Italy
–
Tel:
(+39) 031.3523511 •
Web:
www.harken.it •
Email:
Features
Strong, durable unibody top/side plates
- hardcoat anodized forged aluminum.
Sculpted top plate
- protects sheave and sheds line.
Tough sheaves
- machined from hardcoat anodized solid aluminum.
Proven bearing system -
composite sleeve bearing with sideload ball bearings.
High load drop-in replacement -
30 mm blocks replace Bullet
®
blocks. Larger blocks fit common
cutout and hole spacing allowing easy replacement.
Terms
1
Reeving side
Part number
Maximum line diameter
Maximum working load
Sheave
Sideplate
Block Loading vs Angle of Deflection
180
°
150
°
30
°
90
°
Block load increases when the line turns at a greater angle. Block loads double when the line turns
180°. If there is 400 kg (880 lb) on the line and the angle of deflection is 180°, the Harken through-
deck block is subject to 800 kg (1760 lb). Select blocks carefully. See specification chart on
next page.
Angle of
deflection
Load factor
Angle of
deflection
Load factor
Angle of
deflection
Load factor
30°
52%
90°
141%
150°
193%
45°
76%
105°
159%
160°
197%
60°
100%
120°
173%
180°
200%
75°
122%
135°
185%
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—
Top plate
