is a renowned pulley manufacturer that offers quality of all its components.
The pulleys offer very little friction and high loads. Core Blocks™ 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 steel
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.
These pulleys are not initially designed to
bear human weight. Use with caution, with approval from a professional.
The advantage of Universal Bearing:
·Dynamic and high static
·The Ronstan Universal
Bearing incorporates our proven 2-stage bearing system
Stage 2 - 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, and maintains low friction performance.
·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 isn’t perfect. It is particularly
important for cheek blocks.
·Class leading performance
and sleek, contemporary styling
·Excellent dynamic and high
static load performance
·Less than half the friction
of the nearest competitor
·Durable aluminum alloy
·Central hub hole can be
used as a Becket take-off or tie-up point
·Universal head with full
·Head posts can be locked at
0 or 90 degrees, by using a 2.5 mm Hex/Allen Key
·Alloy Rope/Wire sheave version
2-3/8 in. (60 mm)
Rope: ½ in. (12.7 mm)
¼ in (6.3 mm)
Working Load (non Human): 2 200 LB (1 000 KG)