Ronstan Series 60 Core Block™ - Single
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B Series 60 Core Block 153 - Single B br br Core Blocks 153 are a true all round solution A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads Acetal sheave alloy cheeks and stainless fixings complete the durable package For reliability and a long service life these blocks are the right choice for sheets halyards and control line applications for cruising and racing br br B Universal Bearing B br Dynamic and high static load performance br br The Ronstan Universal Bearing incorporates our proven 2-stage bearing system br br B Stage 1 B - Under moderate loads Acetal ball bearings ensure minimum friction br br B Stage 2 B - Under heavy loads where deformation of ball bearings alone would result in increased friction a sliding Acetal bearing on a polished stainless steel race takes over maintaining low friction performance br br Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isnt perfect Particularly important for cheek blocks br br B Alloy Cheek Plates B br Block cheeks are manufactured from the highest quality alloy for maximum strength Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave minimising rope wear br br B Universal head B br The head assembly incorporates a brass bearing washer to provide smooth 360 153 rotation of the post and shackle A set screw arrangement allows the head to be locked at 0 153 or 90 153 br br Shackles are high quality forged grade 316 stainless steel br br B Features B br UL LI Class leading performance and sleek contemporary styling br LI Excellent dynamic and high static load performance br LI Less than half the friction of the nearest competitor br LI Universal head with full 3-axis articulation br LI Head posts can be locked at 0 or 90 degrees by using a 2 5mm Hex Allen Key br LI Central hub hole can be used as a becket take-off or tie-up point LI UL br br B Applications B br UL LI Ideal for mainsheet halyard and spinnaker sheet applications on boats to 12M 40 br LI Various control line applications on larger yachts LI UL br br B Materials B br UL LI Sheave U V stabilized Acetal br LI Cheek body Aluminium Alloy br LI Ball Bearings High compression strength carbon black Acetal br LI Shackle head post hub Grade 316 stainless steel LI UL br br B Specifications B br B Sheave 216 B 60mm 2-3 8 br B Max Rope 216 B 12mm 1 2 br B Pin 216 B 6mm 1 4 br B M W L B 1 000kg 2 200lbs br B B L B 2 000kg 4 410lbs br B Weight B 235g 8 3oz --- cis2 mmxtmJVt --- br
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