{"title":"Plain Bearing Blocks for Dinghies","description":"\u003cp\u003eSeldén plain bearing blocks (PBB) in 16 mm, 20 mm and 40 mm sheave sizes for static and heavy loads on dinghy halyard systems, boom vangs and kicker tackles where slow line movement and high load capacity matter more than friction.\u003c\/p\u003e\n\u003ch2\u003eHow to choose\u003c\/h2\u003e\n\u003cp\u003ePlain bearing blocks use a polymer bushing rather than ball bearings. This makes them better suited to heavy, slow-moving or static loads where the line moves infrequently and sustained load capacity is the priority. Typical applications are boom vangs, kicker tackles, halyard tuning systems and other controls that are adjusted occasionally and then held under high load. For dynamic applications where the line runs frequently, a ball bearing block from the BBB range will give significantly less friction.\u003c\/p\u003e\n\u003cp\u003eThe 16 mm and 20 mm plain bearing blocks are the lightest option in the range, suited to flag lines, lazy jacks and very light trim lines where load is minimal and simplicity matters. The 20 mm flip-flop is a specific variant designed for dinghy trim lines including cunningham, outhaul and halyard where a compact, low-profile fitting is needed.\u003c\/p\u003e\n\u003cp\u003eThe 40 mm plain bearing blocks handle lines up to 8 mm under heavy or static loads. They suit halyard tuning, mainsheet systems where load is high and movement is infrequent, and boom vang applications. The polymer sheave and stiff glass fibre reinforced cheeks prevent line jamming under sustained load. The fiddle swivel variant combines a large and small sheave in one block body, providing a built-in purchase ratio in a compact unit.\u003c\/p\u003e\n\u003ch2\u003eWhat's in this collection\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePBB16 range\u003c\/strong\u003e is available in composite (401-001-01) and brass (401-001-02) versions, both suited to flag lines, lazy jacks and similar light applications on lines up to 6 mm.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003ePBB20 range\u003c\/strong\u003e includes a standard single (402-001-01) for flag lines and lazy jacks up to 6 mm, and the flip-flop variant (402-001-02) designed for dinghy trim lines including cunningham, outhaul and halyard.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003ePBB40 range\u003c\/strong\u003e covers lines up to 8 mm for heavy and static load applications. Available as swivel (404-001-01R), swivel becket (404-001-02R), strap (404-001-25R) and fiddle swivel (404-001-11R). All have polymer sheaves with stiff glass fibre reinforced cheeks. The swivel variants include a swivel lock for fixed 0° or 90° shackle position.\u003c\/p\u003e","products":[{"product_id":"16-mm-plain-bearing-block-single-composite","title":"16 mm Plain Bearing Block - Single, Composite","description":"\u003cp\u003eThe PBB16 Single Composite Block is a 16mm plain bearing block ideal for flag lines and lazy jacks.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 70 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 140 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 6 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013354254674,"sku":"401-001-01","price":9.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_637780a6-afd9-4898-8437-e3bf60cd4c7a.jpg?v=1763034660"},{"product_id":"16-mm-plain-bearing-block-single-brass","title":"16 mm Plain Bearing Block - Single, Brass","description":"\u003cp\u003eThe PBB16 Single Brass Block is a 16mm plain bearing block designed for flag lines, lazy jacks and similar uses.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 100 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 200 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 6 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013359268178,"sku":"401-001-02","price":9.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_072e0abc-46d9-4e01-944d-31847cf065e0.jpg?v=1763034682"},{"product_id":"20-mm-plain-bearing-block-single","title":"20 mm Plain Bearing Block - Single","description":"\u003cp\u003eThe PBB20 Single Plain Bearing Block is designed for for flag lines and lazy jacks.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 70 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 140 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 6 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013359497554,"sku":"402-001-01","price":9.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_60d5fc83-a7db-4252-90c3-c74b76189616.jpg?v=1763034686"},{"product_id":"20-mm-plain-bearing-block-flip-flop","title":"20 mm Plain Bearing Block - Flip-Flop","description":"\u003cp\u003eThe PBB20 Flip-Flop block is a 20mm plain bearing block designed for dinghy trim lines such as cunningham, outhaul and halyard.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013359923538,"sku":"402-001-02","price":30.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_3c0ca360-0d77-4a42-9e7b-138b78b3d864.jpg?v=1763034687"},{"product_id":"40-mm-plain-bearing-block-single-swivel","title":"40 mm Plain Bearing Block - Single, Swivel","description":"\u003cp\u003eThe PBB40 Single Swivel Block is a 40mm plain bearing block with a swiveling shaft. A swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/p\u003e\u003cp\u003eSuitable for heavy and static loads in halyard tuning, mainsheet systems and boom vang. \u003c\/p\u003e\u003cp\u003ePolymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 350 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 700 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013424509266,"sku":"404-001-01R","price":22.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_4481aebf-335c-42e2-b10d-b298a702384d.jpg?v=1763034828"},{"product_id":"40-mm-plain-bearing-block-single-swivel-becket","title":"40 mm Plain Bearing Block - Single, Swivel, Becket","description":"\u003cp\u003eThe PBB40 Single Becket Swivel Block is a 40mm plain bearing block with a swiveling shaft. A swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/p\u003e\u003cp\u003eSuitable for heavy and static loads in halyard tuning, mainsheet systems and boom vang. \u003c\/p\u003e\u003cp\u003ePolymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 350 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 700 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013425885522,"sku":"404-001-02R","price":28.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_d678843e-e485-4553-b988-1577349ea43c.jpg?v=1763034850"},{"product_id":"40-mm-plain-bearing-block-fiddle-swivel","title":"40 mm Plain Bearing Block - Fiddle, Swivel","description":"\u003cp\u003eThe PBB40 Fiddlet Swivel Block is a 40mm plain bearing block with a swiveling shaft. A swivel lock, a plastic washer which is placed between block body and shackle, is included for fixed 0° or 90° shackle position.\u003c\/p\u003e\u003cp\u003eSuitable for heavy and static loads in halyard tuning, mainsheet systems and boom vang. \u003c\/p\u003e\u003cp\u003ePolymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 350 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 700 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013425983826,"sku":"404-001-11R","price":36.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_3bc3d601-2c4e-41e7-90f7-9d1f0d91a6ec.jpg?v=1763034847"},{"product_id":"40-mm-plain-bearing-block-single-strap","title":"40 mm Plain Bearing Block - Single, Strap","description":"\u003cp\u003eThe PBB40 Single strap block is a 40mm plain bearing block with a fixed stainless strap. The block can be attached with a line or with a shackle.\u003c\/p\u003e\u003cp\u003eSuitable for heavy and static loads in halyard tuning, mainsheet systems and boom vang. \u003c\/p\u003e\u003cp\u003ePolymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eSafe working Load\u003c\/b\u003e: 350 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eBreaking Load\u003c\/b\u003e: 700 \u003cem\u003ekg\u003c\/em\u003e\u003cbr\u003e\u003cb\u003eMax line size\u003c\/b\u003e: 8 \u003cem\u003emm\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Selden Dinghy Store","offers":[{"title":"Default Title","offer_id":52013426016594,"sku":"404-001-25R","price":18.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/1325\/4738\/files\/index_ced66a79-ab05-47b0-82a1-dca3c5b0f23e.jpg?v=1763034849"}],"url":"https:\/\/dinghy.seldenmast.com\/collections\/plain-bearing-blocks.oembed","provider":"Seldén Dinghy Store","version":"1.0","type":"link"}