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Select all	Attribute	Value
	Brand	SKF
	Bore Diameter	80mm
	Number of Teeth	28
	Product Type	Sprocket
	Bore Type	Rough Stock Bore
	Pitch Diameter	170.13mm
	Material	Steel
	Hub Diameter	120mm
	Sprocket Width	50mm
	Maximum Inside Diameter	80mm
	Acceptable Chain Type	12 B-2
	Standards/Approvals	BS, EN

	Select all
	Brand SKF
	Bore Diameter 80mm
	Number of Teeth 28
	Product Type Sprocket
	Bore Type Rough Stock Bore
	Pitch Diameter 170.13mm
	Material Steel
	Hub Diameter 120mm
	Sprocket Width 50mm
	Maximum Inside Diameter 80mm
	Acceptable Chain Type 12 B-2
	Standards/Approvals BS, EN

Datasheet - PHS 12B-2B28

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COO (Country of Origin):: CN

SKF Sprocket, 28 Teeth, 50mm Width - PHS 12B-2B28

This sprocket is a steel transmission component designed to drive roller and conveyor chains in industrial power-transfer systems. It interfaces with 12B-2 chain types and is supplied with a rough-stock bore to permit final machining for precise shaft fit. The component includes a central hub and tooth profile intended for meshing in continuous-drive arrangements and complies with specified British and European standards.

Features and Benefits:

• Steel construction offers high wear resistance during continuous operation
• Rough-stock bore allows custom machining to EXACT shaft tolerances
• 28 teeth provide consistent engagement for steady motion transfer
• Compatible with 12B-2 chain to ensure correct chain meshing
• 50 mm width supports higher load distribution across the chain

Applications

• Suitable for conveyor systems requiring continuous chain drive
• Used with industrial 12B-2 chain assemblies in factories
• Ideal for retrofitting drive trains that need custom bore finishing
• Can be used for heavy-duty material-handling equipment

What bore preparation is required before installation?

The rough-stock bore requires machining to the shaft diameter and keyway specifications on site prior to final assembly.

How does the hub Interface affect mounting stability?

The 120 mm hub diameter provides a substantial contact area for hub-to-shaft coupling and support during torque transmission.

What limitation does the internal clearance impose on shaft choice?

The maximum inside diameter of 80 mm dictates the largest shaft section that can pass through or be accommodated within the bore.

How does the pitch diameter influence chain selection?

The 170.13 mm pitch diameter determines the chain wrap and centre-distance relationships and should match sprocket-pair geometry for correct chain tension.

Which standards relate to material and dimensional conformity?

The component is produced to meet the listed BS and EN approvals governing dimensional and material criteria.

SKF 28 Tooth Rough Stock Bore Sprocket, PHS 12B-2B28 12 B-2

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