Grey-Iron V-Belt Pulleys with Defined Fits

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Pulley blanks and finished drive interfaces

Relia Casting offers a four-groove grey-iron blank and separately specified finished pulleys with machining, keyways and dynamic balancing. The blank range accepts A, B, C, SPA, SPB and SPC belt-section enquiries. These are alternative profiles: the selected section controls how the belt sits and where its working diameter lies.

Our own sand-casting and machining production can join the cast rim and hub to the required final groove and shaft geometry. For replacement supply, the nominal design is a better starting reference than a worn groove. Material and dimensional reports and real workshop/equipment photographs are available, while the inspected sample and your approval establish the repeat-order configuration.

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The groove surface and geometry affect belt contact

Provide a groove section with the required flank geometry, spacing, edge condition and surface requirement. Avoid sharp burrs at the entry or damage that can mark the belt. A profile gauge or other selected check should address the final groove rather than only the outside rim.

Keep the treatment coverage explicit. Sandblasting and painting are offered, but the finished belt-contact surface needs the condition chosen for the drive. An uncontrolled coating layer can change the interface you intended to purchase.

Belt contact

Selected groove profile and surface

Treatment

Coverage kept off controlled contacts

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Blank and finished pulley orders leave different work downstream

For a blank, define which groove and hub geometry is cast, the allowance for later machining and the dimensions accepted before that work. The four-groove grey-iron listing is a blank enquiry; the actual count and size remain on the drawing.

For a finished pulley, include bore/keyway machining, groove finishing, surface work and the defined balancing deliverable. A clear handover prevents the receiving team from discovering that a nominal pulley still needs critical cutting or that balancing was performed before the final rotating configuration existed.

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The hub reaches the shaft in its accepted condition

Measure the bore, keyway and locating features before release, using the stated datum and fit requirement. Include the groove-to-axis relationship required by the drawing. A key or test shaft used for a fit check should represent the intended assembly reference.

For a replacement pulley, identify the actual equipment duty and mounting method. Our catalogue includes lathe, compressor, crusher and other machinery enquiries; the controlled pulley drawing establishes compatibility, rather than the application name or similar external shape.

Shaft interface

Bore, keyway and locating face

Relationship

Grooves referenced to running axis

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Inspection separates profile, runout and balance results

Accept the cast blank or finished component at its stated stage. For a finished pulley, the useful record covers groove profile and spacing, bore/keyway, face and radial relationships, and the required balance result. A balance report alone cannot establish whether the belt section or shaft fit is correct.

Keep all results connected to the drawing revision and final configuration. If the pulley is machined again after balancing, evaluate the effect on that result before relying on the earlier record. The approval then describes the component that will actually rotate.

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Protection preserves the belt and shaft interfaces

Separate pulleys so groove edges, bore and keyway cannot strike another component in transit. Protect the selected finished surfaces from corrosion and prevent abrasive debris from remaining in a groove. Define any temporary coating that must be removed before fitting the belt or shaft.

Identify the pulley configuration and keep balancing and dimensional records with the same part or batch reference. Receiving can then check contact surfaces and fit features without confusing a similar blank, an unfinished component and the accepted final pulley.

Protection

Separate grooves and machined hubs

Identity

Final configuration with matching records

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A drive component that keeps its accepted configuration

Relia can supply the blank or finished pulley package with the required groove, shaft connection, surface condition and records linked to one revision. That lets you compare the actual work being purchased and the work still retained at your plant.

Drawing review leads to sample manufacture and inspection, your confirmation, then batch production. Keep later changes to the bore, grooves, keyway or attached hardware visible because they can alter the accepted rotating configuration. Receiving then has a usable belt interface, a defined shaft fit and the relevant dimensional and balance evidence together.