Ronstan Series 25 Ball Bearing Orbit Block™ - Becket & Swivel S...
DESCRIPTION
DESCRIPTION
Series 25 Ball Bearing Orbit Block™ - Becket & Swivel Shackle
Single sheave ball bearing block with becket hub and swivel shackle head.
Series 25 Ball Bearing Orbit Blocks™, delivering superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications.
Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan’s renowned high compression strength acetal bearing system, the Series 25 BB Orbit Blocks™ are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 meters.
Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability.
Features:
- 2-stage ball bearing system.
- Suits up to 8mm (5/16”) lines.
- Hollow hub for becket take-off.
- Lashing blocks suit up to 4mm (5/32”) lashing.
Specifications:
- Max. Rope diameter (in): 5/16
- M.W.L. (lb): 500
- Sheave diameter (in): 1
- B.L. (lb): 990
- Weight (oz): 0.6
Applications:
- Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft).
- Control lines.
- Cascading vangs.
- Leech lines & cunninghams.
Materials:
- Frame/cheeks: Toughened, glass fibre reinforced nylon.
- BB Sheave and balls: high compression strength acetal.
Our Part # RONRF28100 | Mfr. Part # RF28100
FEATURES
FEATURES
- 2-stage ball bearing system.
- Suits up to 8mm (5/16”) lines.
- Hollow hub for becket take-off.
- Lashing blocks suit up to 4mm (5/32”) lashing.
TECHNICAL INFORMATION
TECHNICAL INFORMATION
| Specification | Value |
|---|---|
| Manufacturer | Ronstan |
| Manufacturer part number | RF28100 |
| Max. Rope diameter (in) | 5/16 |
| M.W.L. (lb) | 500 |
| Sheave diameter (in) | 1 |
| B.L. (lb) | 990 |
| Weight (oz) | 0.6 |
| Frame/cheeks | Toughened, glass fibre reinforced nylon. |
| BB Sheave and balls | high compression strength acetal. |
| Supplier technical detail | Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. |
| Supplier technical detail | Featuring Ronstan’s renowned high compression strength acetal bearing system, the Series 25 BB Orbit Blocks™ are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 meters. |
| Supplier technical detail | Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. |
| Supplier technical detail | The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability. |
| Supplier technical detail | Suits up to 8mm (5/16”) lines. |
| Supplier technical detail | Lashing blocks suit up to 4mm (5/32”) lashing. |
| Supplier technical detail | Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft). |
| Applications | Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft). Control lines. Cascading vangs. Leech lines & cunninghams. |
| Materials | Frame/cheeks: Toughened, glass fibre reinforced nylon. BB Sheave and balls: high compression strength acetal. |
| Product-name configuration | Becket & Swivel Shackle |