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Harken 57mm Black Magic AirBlocks

Harken 57mm Black Magic AirBlocks

With high strength-to-weight ratios and free-rolling high-load roller bearings, these versatile blocks are the workhorses of the Harken line. Use for sail controls that see lots of action including mainsheet, runner, halyard, and spinnaker systems.

Airblocks are very easy to clean and service. they have few parts and no loose balls or rollers to misplace. unlike blocks that are riveted together, three fasteners allow for quick disassembly for service.

Use 57 mm Black Magic® AirBlocks® on offshore boats. These strong, lightweight blocks are sculpted aluminum, with Torlon® rollers and carbon-black balls for strength and UV protection. Rollers are housed in a unique center cage and are isolated for less friction. Blocks feature a three-way head system and come in high- and low-load configurations. Low-load AirBlocks have red isolators for identification and come with 316 stainless shackles, but are otherwise the same as high-load.

Part No. Description Sheave Dia. Length Weight Shackle Dia. Max Line SWL Break Strength
mm in mm oz g in mm in mm lbs kg lbs kg
H3226 Single/swivel/low-load 57 4-11/16 119 5.44 154 1/4 6 7/16 12 1655 750 3310 1500
H3229 Single/swivel/low-load/becket 57 5-1/2 140 5.95 169 1/4 6 7/16 12 1655 750 3310 1500
H3228 Double/swivel/low-load 57 5-3/16 132 12.05 342 5/16 8 7/16 12 2755 1250 5510 2500
H3219 Triple swivel 57 5-3/16 132 13.34 378 5/16 8 7/16 12 4850 2200 9700 4400
H3215 Single/swivel/high-load 57 4-11/16 119 5.36 152 1/4 6 7/16 12 2500 1134 5000 2268
H3216 Single/swivel/high-load/becket 57 5-1/2 140 5.86 166 1/4 6 7/16 12 2500 1134 5000 2268
H3217 Double/swivel/high-load 57 5-3/16 132 11.86 336 5/16 8 7/16 12 3600 1633 7200 3267
H3218 Double/swivel/high-load/becket 57 6 152 12.43 352 5/16 8 7/16 12 3600 1633 7200 3267
H3227 Stand-up/high-load* 57 4-1/2 114 7.04 200 1/4 6 7/16 12 2500 1134 5000 2268
H3214 Loop Block 57 3 76 3.23 92 - - 7/16 12 2500 1134 5000 2268

*1/4" (6mm) - Fastener circle: 1-15/32" (37mm)

H3215 Black Magic AirBlock 57mm Single Swvl HL Price: $161.92 H3216 Black Magic AirBlock 57mm Sgl Swvl/Bec HL Price: $197.34
H3217 57mm Black Magic AirBlock Dbl Swivel, HL Price: $321.29 H3218 57mm Black Magic AirBlock Dbl Swivel, Becket, HL Price: $340.96
H3219 Black Magic AirBlock 57mm Triple Price: $418.97 H3226 Black Magic Airblock 57mm Single Swvl LL Price: $143.44
H3227 Black Magic AirBlock 57mm Stand-up HL Price: $277.42 H3228 Black Magic AirBlock 57mm Double Swvl LL Price: $281.91
H3229 Black Magic AirBlock 57mm Sgl Swvl/Bec LL Price: $180.49


Harken 75mm Black Magic AirBlocks

Harken 75mm Black Magic AirBlocks

With high strength-to-weight ratios and free-rolling high-load roller bearings, these versatile blocks are the workhorses of the Harken line. Use for sail controls that see lots of action including mainsheet, runner, halyard, and spinnaker systems.

Airblocks are very easy to clean and service. they have few parts and no loose balls or rollers to misplace. unlike blocks that are riveted together, three fasteners allow for quick disassembly for service. Low-load AirBlocks have red isolators for identification and come with 316 stainless shackles, but are otherwise the same as high-load.

75 mm Black Magic® AirBlocks® feature Torlon® roller bearings for strength and reduced wear. The unique center cage separates rollers for less friction. Sideload ball bearings are protected by sculpted aluminum sideplates. Dissimilar metals are isolated to minimize corrosion. Low-load blocks use Delrin® rollers and type 316 stainless steel shackles.

Like all AirBlocks®, the three-way head swivels/locks in front/side positions. Blocks are easily disassembled with a single Allen wrench.

Use straphead blocks with Loups® or straps aligned fore/aft or side to side.

Part No. Description Sheave Dia. Length Weight Shackle Dia. Max Line SWL Break Strength
mm in mm oz g in mm in mm lbs kg lbs kg
H3242 Spriddle/becket 75/57 8-7/8 225 18.96 538 5/16 8 9/16 14 5,000 2,268 10,000 4,536
H3231 Single/swivel 75 5-1/8 129 11.68 331 5/16 8 9/16 14 5,000 2,268 10,000 4,536
H3232 Single/swivel/becket 75 6-3/16 157 12.8 363 5/16 8 9/16 14 5,000 2,268 10,000 4,536
H3233 Double/swivel 75 5-1/4 134 25.44 721 3/8 10 9/16 14 7,500 3,402 15,000 6,804
H3244 Stand-up* 75 5-15/16 151 15.6 442 - - 9/16 14 5,000 2,268 10,000 4,536
H3241 Spriddle/swivel 75/57 7-13/16 199 17.76 503 5/16 8 9/16 14 5,000 2,268 10,000 4,536
H3243 Single/swivel/low-load 75 5-1/8 129 11.82 335 5/16 8 9/16 14 3,000 1,361 6,000 2,722
H3230 Single loop block 75 3 15/16 100 7.36** 209** - - 9/16 14 5,000 2,268 10,000 4,536

*Uses 627 Padeye ** Weight without Loop

H3230 75mm Loop Block Price: $344.12 H3231 Black Magic AirBlock 75mm Single Swivel Price: $388.08
H3232 AirBlock 75mm Single Swvl/Bec Price: $438.46 H3233 AirBlock 75mm Double Swivel Price: $727.63
H3241 75mm Spriddle Block Price: $664.93 H3242 75mm Black Magic Airblock Spriddle, Becket Price: $725.12
H3243 75mm Single Swivel Low-Load Block Price: $325.20 H3244 75mm Stand-up Block Price: $536.45


Harken 100mm Black Magic AirBlocks

Harken 100mm Black Magic AirBlocks

100 mm Black Magic® AirBlocks® are used on offshore boats where weight and performance are critical. They feature free-rolling, large-diameter aluminum sheaves with Torlon® roller bearings housed in a unique center cage. UV-resistant, carbon-black Delrin® balls carry sideloads. Corrosion is minimized by isolating dissimilar metals. Blocks are Hardkote-anodized and have 17-4 PH stainless headposts and shackles. Easily disassembled.

Part No. Description Sheave Dia. Length Weight Shackle Dia. Max Line SWL Break Strength
mm in mm oz g in mm in mm lbs kg lbs kg
H1993 Spriddle 100/75 11-11/16 297 26.5 752 3/8 10 5/8 16 7500 3402 15000 6804
H3246 Single/Swivel 100 8 203 21.98 623 3/8 10 5/8 16 7500 3402 15000 6804
H3247 Single/Swivel/Becket 100 9-1/2 241 23.82 675 3/8 10 5/8 16 7500 3402 15000 6804
H3248 Double/Swivel 100 8-15/16 227 45.28 1284 1/2 12 5/8 16 11000 4990 22000 9979
H3254 Stand-up* 100 7-11/16 195 31.18 884 - - 5/8 16 7500 3402 15000 6804
H3245 Single Loop Block 100 5-1/16 130 13.09 371 - - 5/8 16 7500 3402 15000 6804
H3089 Straphead Spriddle 100/75 9-1/4 235 24 680 - - 5/8 16 7500 3402 15000 6804

*Uses 648 Padeye

H1993 AirBlock 100mm Spriddle Price: $976.74 H3089 AirBlock 100mm Straphead Spriddle Price: $1,001.12
H3245 100mm Loop Block Price: $513.57 H3246 100mm Single Swivel Block Price: $549.78
H3247 100mm Single Swivel Block w/Becket Price: $643.19 H3248 100mm Double Swivel Block Price: $1,105.81
H3254 100mm Stand-Up Block Price: $684.95


Harken 125mm & 150mm  Black Magic AirBlocks

Harken 125mm & 150mm Black Magic AirBlocks

125 mm & 150mm Black Magic AirBlocks® feature Torlon® rollers in a self-contained center cage. Rollers stay parallel for low-friction efficiency. UV-resistant, carbon-black Delrin® balls carry sideloads.

Used on offshore boats, these blocks offer a no “climb-out” deep groove sheave with radiused edges to protect line. Sculpted aluminum sideplates and thin-profile sheaves make these blocks very lightweight. No stainless-to-aluminum contact prevents corrosion.

Part No. Description Sheave Dia. Length Weight Shackle Dia. Max Line SWL Break Strength
mm in mm oz g in mm in mm lbs kg lbs kg
H3256 125 Single w/ Swivel 125 10 254 37.31 1054 1/2 12 3/4 19 11000 4990 22000 9977
H3261 125mm Stand-up 125 9-1/16 230 44.72 1268 - - 3/4 19 11000 4990 22000 9977
H3255 125mm Loop block* 125 6 163 23.78 674 - - 3/4 19 11000 4990 22000 9977
H3262 150mm Single w/ Swivel 150 12 305 64.9 1840 5/8 16 1 25 15000 6802 30000 13605
H3266 150mm Stand-up 150 11-1/8 283 85.34 2419 - - 1 25 15000 6802 30000 13605

*Loop not included


H3255 125mm Loop Block Price: $630.08 H3256 125mm Single Swivel Block Price: $688.78
H3261 125mm Stand-Up Block Price: $827.86 H3262 150mm Single Swivel Block Price: $1,242.60
H3266 150mm Stand-Up Block Price: $1,315.34


Harken Black Magic Teardrop Blocks

Harken Black Magic Teardrop Blocks

Harken Black Magic Teardrop blocks are ideal for use as mastbase leads and for other applications where limited articulation or direct attachment is desired. When attached to an appropriate padeye, Teardrop blocks will not hit the deck when lines are slack, yet allow sufficient movement to ensure fair leads when jumping halyards. They are often used on permanent backstays of fractionally rigged boats where the backstay can be spliced directly to the head of the block.

The 3042 and 3046 are low-load blocks designed for use on production boats that have mounting posts on the mastcollar.

Part No. Description Sheave Dia. Clevis Pin Dia. Length Weight Max Line SWL Break Strength Use Padeye
in mm in mm in mm oz g in mm lbs kg lbs kg
H3223 57mm Padeye/High-load 2-1/4 57 5/16 8 3-3/8 86 3.92 111 3/8 10 2500 11334 5000 2268 627
H3240 75mm Padeye/High-load 3 75 3/8 10 4-7/16 113 8.72 247 9/16 14 5000 2268 10000 4535 648/689
H3253 100mm Padeye 4 100 1/2 12.7 5-13/16 148 16 454 5/8 16 7500 3402 15000 6804 -


H3223 57mm Teardrop Padeye Hi-Load Price: $165.84


Harken Black Magic Footblocks

Harken Black Magic Footblocks



Harken Black Magic Footblocks carry some of the highest loads imposed by running rigging. Use these blocks on big boats for genoas and spinnakers. Some Footblocks have integral line lockoffs that are intended to hold lines temporarily (they should not be used in place of line stoppers or clutches). Available in a wide range of sheave sizes for lines 7/16 to 1 inch in diameter depending on the block (see table below).

Harken Black Magic blocks have sculpted Teflon-impregnated Hardkote-anodized aluminum sideplates and sheaves, unique center caged Torlon roller bearings and captive carbon black ball bearings. Black Magic AirBlocks are made to be noncorrosive and UV resistant for high-load efficiency and excellent performance.

Part No. Description Sheave Dia. Length Height Weight Max Line SWL Break Strength Fasteners (FH)
in mm in mm in mm oz g in mm lbs kg lbs kg in mm
H3220 57mm Single/high-load 2-1/4 57 3-5/16 84 1 25 4.29 122 7/16 12 2500 1134 5000 2268 4 x 1/4 4 x 6
H3221 57mm Single/high-load/lockoff* 2-1/4 57 3-5/16 84 1 25 5.44 154 7/16 12 2500 1134 7500 2268 4 x 1/4 4 x 6
H3222 57mm Double/high-load 2-1/4 57 3-5/16 84 1-13/16 46 7.6 215 7/16 12 1650 750 3300 1500 4 x 1/4 4 x 6
H3234 75mm Single 3 75 4-3/8 111 1-1/4 32 9.76 277 9/16 14 5250 2380 10500 4762 4 x 5/16 4 x 8
H3235 75mm Double 3 75 4-3/8 111 2-1/14 57 17.28 490 9/16 14 3465 1572 6930 3143 4 x 5/16 4 x 8
H3236 75mm Single/lockoff* 3 75 4-3/8 111 1-1/4 32 11.28 320 9/16 14 5250 2380 10500 4762 4 x 5/16 4 x 8
H3237 75mm Double/lockoff* 3 75 4-3/8 111 2-1/14 57 20.24 574 9/16 14 3465 1572 6930 3143 4 x 5/16 4 x 8
H3249 100mm Single 4 100 5-5/8 143 1-5/16 33 19.57 555 5/8 16 7500 3402 15000 6803 4 x 3/8 4 x 10
H3250 100mm Double 4 100 5-5/8 143 2-7/16 62 34.1 967 5/8 16 4950 2250 9900 4500 4 x 3/8 4 x 10
H3257 125mm Single 5 125 6-15/16 176 1-11/16 43 34.29 972 3/4 19 11000 4990 22000 9977 4 x 1/2 4 x 12
H3258 125mm Double 5 125 6-15/16 176 2-13/16 71.5 60.35 1711 3/4 19 7370 3350 14740 6700 4 x 1/2 4 x 12
H3263 150mm Single 6 150 8-1/16 205 1-7/8 48 58.58 1661 1 25 15000 6818 30000 13636 4 x 5/8 4 x 16

* - Lockoffs are intended to hold lines temporarily and should not be used in place of line stoppers or clutches.

H3220 57mm Footblock, Single, High-Load Price: $149.86 H3221 57mm Footblock, Single, High-Load, Lockoff Price: $208.60
H3222 57mm Footblock, Double, High-Load Price: $261.58 H3234 75mm Footblock, Single Price: $306.06
H3235 75mm Footblock, Double Price: $529.41 H3236 Single Block-75mm Foot w/ Lockoff+ Price: $389.14


Harken Black Magic Air Runners

Harken Black Magic Air Runners

Harken Black Magic Air Runners are strong, lightweight blocks with extremely free-rolling sheaves with Torlon roller bearings in a center cage and sideload bearing strips to dampen rig vibration. Available in a wide range of sheave sizes for lines 7/16 to 1 inch in diameter depending on the block (see table below). Heads for these blocks are offered with parallel/perpendicular shackles. Tangs attach turnbuckles, toggles, and other fittings.

Harken Black Magic blocks have sculpted Teflon-impregnated Hardkote-anodized aluminum sideplates and sheaves. Black Magic blocks are made to be noncorrosive and UV resistant for high-load efficiency and excellent performance.

Part No. Description Sheave Dia. Length Weight Clevis Pin Dia. Max Line SWL Break Strength
in mm in mm oz g in mm in mm lbs kg lbs kg
H3224 57mm Single 2-1/4 57 3-3/8 86 4.42 125 3/8 10 1/2 12 2500 1134 5000 2268
H3238 75mm Single 3 75 4-5/8 118 10.16 288 1/2 12.7 9/16 14 5000 2268 10000 4544
H3239 75mm Single w/ Becket 3 75 5-3/4 146 11.2 318 1/2 12.7 9/16 14 5000 2268 10000 4544
H3251 100mm Single 4 100 6-3/16 157 17 481 5/8 15.9 5/8 16 7500 3402 15000 6802
H3252 100mm Single w/ Becket 4 100 7-9/16 193 19.12 542 5/8 15.9 5/8 16 7500 3402 15000 6802
H3259 125mm Single 5 125 7-11/16 195 29.76 844 3/4 19 3/4 19 11000 4990 22000 9980
H3260 125mm Single w/ Becket 5 125 9-1/2 240 33.52 950 3/4 19 3/4 19 11000 4990 22000 9980
H3264 150mm Single 6 150 8-3/4 221 50.64 1436 3/4 19 1 25 15000 6802 30000 13605
H3265 150mm Single w/ Becket 6 150 10-13/16 275 56.72 1608 3/4 19 1 25 15000 6802 30000 13605




Harken Black Magic Air Runner Accessories

Harken Black Magic Air Runner Accessories

Heads are offered with parallel/perpendicular shackles. Tangs attach turnbuckles, toggles, and other fittings. No tools required for installation. Foam padded Block Socks easily install over Air Runners® to protect your blocks, deck, and crew

Heads Tangs Block Socks
Perpendicular Part No. Parallel Part No. Weight Tang Part No. Weight Runner Pin Dia. Checkstay Pin Dia. Block Socks Part No. Fits
oz g oz g in mm in mm
3048 3048 3.8 108 747 3 85 7/16 11.1 1/4 6 3035 1991 1992
3051 3051 7.4 210 3052 5.5 156 5/8 15.9 3/8 10 3036 3013 3014
3030 3030 13.8 381 3031 9 255 3/4 19 7/16 11.1 3037 3019 3020
3028* 3026* 19 537 3027* 11 310 3/4 19 1/2 12.7 3038 3024 3025


H3026 Air Runner Head for 75mm, Parallel Price: $713.86 H3027 Air Runner Tang for 150mm Price: $265.54
H3028 Air Runner Head for 150mm, Perpendicular Price: $686.62 H3030 Air Runner Head for 125mm, Perpendicular or Parallel Price: $455.27
H3031 Air Runner Tang for 125mm Price: $236.32 H3035 Block Sock for 75mm Price: $29.35
H3036 Block Sock for 100mm Price: $30.54 H3037 Block Sock for 125mm Price: $33.09
H3038 Block Sock for 150mm Price: $35.29 H3048 Air Runner Head for 75mm, Perpendicular or Parallel Price: $199.36
H3051 Air Runner Head for 100mm, Perpendicular or Parallel Price: $252.96 H3052 Air Runner Tang for 100mm Price: $204.25
H747 Air Runner Tang for 75mm Price: $50.21

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