25mm HHL Ball Bearing Block

Ronstan Series 25 Ball Bearing HHL Lashing Orbit Block delivers high load capacity with minimal weight for dinghy and small boat control systems. Its primary benefit is reliable low-friction performance under heavy loads using a two-stage ball bearing system.

Problem: modern performance rigs and foiling boats use small-diameter lines that still carry large loads. Solution: this HHL Orbit block combines a Grade 2205 stainless steel sheave and bearing race with Grade 304 stainless ball bearings and a hollow stainless hub so you keep efficient line control and secure lashing without added bulk.

• High load capacity: 880 lb M.W.L. and 2650 lb B.L. for demanding applications
• Compact 1 in (25mm) sheave that suits up to 8mm (5/16 in) rope
• Two-stage ball bearing system for smooth low-friction rotation
• Hollow stainless hub with becket take-off and lashing up to 4mm (5/32 in)
• Lightweight frame: toughened glass fibre reinforced nylon at 1.2 oz
• Materials engineered for corrosion resistance: Grade 2205 sheave and race with Grade 304 bearings

Use cases: mainsheet and spinnaker sheet turning blocks, cunninghams, cascading vangs and control lines on dinghies to 4 m (13 ft). Compared to plain acetal-only sheaves, the HHL variant resists deformation and maintains bearing life under repeated peak loads.

Trust signals: specification-backed materials, measurable M.W.L. and B.L., and Ronstan engineering make this block suitable for competitive and performance use. If you want reliable low-friction control with secure lashing options, this HHL Orbit block fits your rigging needs.