{"product_id":"harken-29-mm-zircon-block","title":"Harken 29 mm Zircon Block","description":"\u003c!-- harken-official:v2 Sku:2185 page_sha256:b8c0f97208e719fa2e7afdf1a591d2abb3ef2a86a5db01e84cf6a1550e07b254 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe newest Zircon offerings are six models with 29 mm sheave diameters. These expand the Zircon offering from eight models to eighteen. Zircon is not an all-purpose alternative—no block is. But these smaller sizes make Zircon appropriate for control lines where multi-part purchases are required. Zircon reacts immediately. So, when the pressure gets light and you ease that 24:1 Cunningham rigged under the deck or want to let the jib lead forward for some more power through the chop, you will get response.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e240 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e525 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 11\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e43 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e175 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 1\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e29 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e10.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e0.37 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=68a2d23164e3a2ed9e9cd16aea14ccf20de209c335160b04becc5904a98ad3ff --\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cdetails\u003e\u003csummary\u003eAre there installation precautions for soft attachments?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eAvoid lashing or attaching in line with the seam, which can cause the block to split apart and fail. Lash through both cheeks instead.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat maintenance routine is suggested for the block?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eClean frequently with detergent and fresh water, applying to the sheave, ceramic bearings, and sideplate areas while rotating parts.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the proper mounting orientation for lashings?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe lashing must go through both block cheeks to maintain structural integrity and prevent the block from being split by force.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan an additional block be installed on the becket for increased purchase?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eIf adding a block to the becket, ensure the load on it is no more than 1\/3 that of the upper block. Do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow should I maintain the Harken Zircon Block?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eClean block and attachments frequently with detergent and fresh water. Rotate the sheave during cleaning to distribute and flush.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre there any safety warnings for load distribution using a becket?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eNever fully load a separate system from the becket; excess load on the becket block can lead to failure. Follow the 1\/3 load guideline.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat materials are the sheave and sideplates made from?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe sheave and sideplates use strong and reliable fiber reinforced composite construction for strength and durability.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat should be inspected regularly for safety?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops to ensure safe operation.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat are the Zircon block sheave and sideplates constructed from?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe sheave and sideplates are made from fiber reinforced composite, providing strength and reliability for high-performance applications.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre there any precautions when attaching lashings to the block?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eDo not run soft attachments inline with the seam. If the lashing is in line with the seam, it may split the block apart and cause failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat should you check on lashings and loops during inspection?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eInspect for wear and UV damage, and replace any compromised splices on lashings or attachment loops immediately for safety.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are there installation precautions for soft attachments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Avoid lashing or attaching in line with the seam, which can cause the block to split apart and fail. Lash through both cheeks instead.\"}}, {\"@type\": \"Question\", \"name\": \"What maintenance routine is suggested for the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean frequently with detergent and fresh water, applying to the sheave, ceramic bearings, and sideplate areas while rotating parts.\"}}, {\"@type\": \"Question\", \"name\": \"What is the proper mounting orientation for lashings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The lashing must go through both block cheeks to maintain structural integrity and prevent the block from being split by force.\"}}, {\"@type\": \"Question\", \"name\": \"Can an additional block be installed on the becket for increased purchase?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, ensure the load on it is no more than 1\/3 that of the upper block. Do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"How should I maintain the Harken Zircon Block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean block and attachments frequently with detergent and fresh water. Rotate the sheave during cleaning to distribute and flush.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any safety warnings for load distribution using a becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Never fully load a separate system from the becket; excess load on the becket block can lead to failure. Follow the 1\/3 load guideline.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are the sheave and sideplates made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates use strong and reliable fiber reinforced composite construction for strength and durability.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected regularly for safety?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops to ensure safe operation.\"}}, {\"@type\": \"Question\", \"name\": \"What are the Zircon block sheave and sideplates constructed from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are made from fiber reinforced composite, providing strength and reliability for high-performance applications.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any precautions when attaching lashings to the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not run soft attachments inline with the seam. If the lashing is in line with the seam, it may split the block apart and cause failure.\"}}, {\"@type\": \"Question\", \"name\": \"What should you check on lashings and loops during inspection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect for wear and UV damage, and replace any compromised splices on lashings or attachment loops immediately for safety.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250990047569,"sku":"2185","price":82.0,"currency_code":"NZD","in_stock":true},{"title":"Double","offer_id":53250990080337,"sku":"2187","price":144.0,"currency_code":"NZD","in_stock":true},{"title":"Triple","offer_id":53250990113105,"sku":"2189","price":202.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/bcfb2cf2-3f9d-40b9-8d99-eafb7f718d61.jpg?v=1773130204","url":"https:\/\/www.sailrace.com\/en-nz\/products\/harken-29-mm-zircon-block","provider":"SailRACE","version":"1.0","type":"link"}