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57mm Aluminum Footblock — Lockoff

57mm Aluminum Footblock — Lockoff

Part No. 3221

Sheave Ø (mm) 57 mm

Sheave Ø (in) 2 1/4 in

Maximum line Ø (mm) 12 mm

Maximum line Ø (in) 7/16 in

Maximum working load (kg) 1134 kg

Maximum working load (lb) 2500 lb

Use footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets. Either metric or imperial flathead fasteners may be used for mounting and are not exposed. Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)84 mm
Length (in)3 5/16 in
Height (mm)25 mm
Height (in)1 in
Weight (g)154 g
Weight (oz)5.44 oz
Maximum line Ø (mm)12 mm
Maximum line Ø (in)7/16 in
Maximum working load (kg)1134 kg
Maximum working load (lb)2500 lb
Breaking load (kg)2268 kg
Breaking load (lb)5000 lb
Number of fasteners4
Fasteners (mm)6 FH mm
Fasteners (in)1/4 FH in
A (mm)9.5 mm
A (in)3/8 in
B (mm)22.5 mm
B (in)7/8 in
C (mm)51.5 mm
C (in)2 1/32 in
D (mm)16 mm
D (in)5/8 in
E (mm)59 mm
E (in)2 5/16 in
F (mm)84 mm
F (in)3 5/16 in
G (mm)13 mm
G (in)1/2 in
3221AL-3718AL3717H-34389AHBB85HCP355HFS796HFS796AL-3220
ID BOM Qty Price
AL-3220 1 more info $52.00
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Lockoff - 57mm Footblock with Lockoff

Footblocks with lockoffs temporarily secure sheets.

HFS796 3 more info $0.30
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Fastener - M4 x .7 x 12mm Socket Head Cap Screw, Black

Fasten with M4 hex wrench.

HBB85 1 more info $28.00
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Roller Cage Assembly - 57mm Black Magic Block

Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

H-34389A 1 more info $26.21
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Sheave Assembly - 57mm Black Magic Block

Sheaves are Hard Lube-anodized for maximum UV protection and a smooth surface. Captive Delrin® ball bearings carry side loads.

AL-3718 1 more info $84.00
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Sideplate with Helicoils - 57mm Black Magic Footblock, Lockoff

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.

AL-3717 1 more info $84.00
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Sideplate with Isolators - 57mm Black Magic Footblock, Lockoff

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface. Dissimilar metals isolated to prevent corrosion.

HCP355 1 more info $1.50
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O-Ring - 11/16 x 7/16

O-rings form a watertight seal.