{"product_id":"r-d-marine-6-bobbin-shaft-coupling-808006","title":"R\u0026D Marine 6\" Bobbin Shaft Coupling 808006","description":"A bobbin coupling is a double flange coupling, which is used to extend the boat propeller shaft. They can also be used for making a double flexible coupling with two R\u0026amp;D type flexible couplings. This can provide excellent noise and vibration control, at a very reasonable price.\nThe 6\" R\u0026amp;D bobbin coupling is machine from steel, and the flanges will suit gearbox flanges (5.75\") for PRM, Borgwarner Velvet Drive, ZF and Twin Disc gearbox.\n\nBobbin coupling dimensions:\na - Flange outside diameter = 5.75\"\nb - Hole pitch circle = 4.75\"\nc - Number of holes = 6\nd - Hole size = 0.50\"\ne - Register diameter = 3.00\" male on one flange and female on the other\nf - Bobbin coupling length = 5.86\"\ng - Bobbin neck diameter = 4.25\"\n\n\u003cimg alt=\"Bobbin Shaft Coupling Dimensions Diagram\" src=\"https:\/\/d1blekj7w4kc3j.cloudfront.net\/files\/couplings\/bobbin-couplings.jpg\" title=\"Bobbin Coupling Diagram\" width=\"300\" height=\"155\"\u003e\n\nR \u0026amp; D Marine Bobbin shaft coupling spacer number 202-250","brand":"R\u0026D","offers":[{"title":"Default Title","offer_id":57875005800829,"sku":"808006","price":607.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/0199\/3204\/files\/808006_1_1fec8d85-401a-4f8a-a299-f527665ea3d3.jpg?v=1772337113","url":"https:\/\/waterworldsports.co.uk\/products\/r-d-marine-6-bobbin-shaft-coupling-808006","provider":"waterworldsports.co.uk","version":"1.0","type":"link"}