Steel helical gear next to a bronze worm shaft on a machining bench

J. F. Peraita Del Hoyo & Cia. Ltda.

Made-to-order industrial gears and mechanical components

Manufacturing and reconditioning to technical drawing or physical sample, in São Paulo, Brazil, since 1962.

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Since 1962

More than six decades of industrial machining in São Paulo

Made to order

Every part defined according to the customer's application

From drawing or sample

Reproduction of components with no drawing available

Products & services

What we manufacture and recondition

Every component is defined from the technical drawing, the physical sample and the industrial application it is intended for.

Industrial gears

Spur and helical gears, straight bevel gears, sprockets, timing-belt pulleys, splines, racks and screws — including a gear tooth milling service.

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Worm wheels and worm shafts

Bronze worm wheels and single or multi-start worm shafts with ground finish, full re-cutting of teeth and worm manufacturing to the required centre distance.

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Industrial gearboxes

Overhaul, reconditioning and upgrading of gearboxes, with analysis and manufacturing of replacement components from drawing or sample.

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Custom machining

Precision milling and machining of special parts, gear rims, replacement of discontinued items and industrial maintenance demands.

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Why us

Why choose J. F. Peraita

In business since 1962

More than six decades manufacturing and reconditioning mechanical components for Brazilian industry.

Manufacturing from drawing or sample

When no drawing exists, we reproduce the component from the physical part — including discontinued items.

Support for breakdowns and machine stoppages

Much of our demand arrives as urgent maintenance: we assess the part and respond quickly to the quotation request.

Experience with special worm gear sets

Multi-start sets — already produced with up to 13 starts — and re-cutting of bronze worm wheel teeth.

Inspection and technical documentation on request

Dimensional verification, drawing approval and formal response to inspections when required by the customer.

About the company

Technical capability

Machines, processes and materials

Gear tooth milling, CNC and conventional turning, grinding, planing and broaching carried out in-house at our plant in the Brás district of São Paulo.

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Processes run in-house: Tooth milling of gears and worm wheels · CNC and conventional turning · Thread, cylindrical, surface and gear tooth grinding · Vertical shaping and broaching
Materials worked: SAE 1045 steel · SAE 8620 steel (case hardening) · SAE 4340 steel · Alloy steels to customer drawing
Worm gear geometries: Starts: From 1 up to 13 starts · Hand of helix: Right and left hand · Helix angle: Up to 55 degrees · Pressure angle: From 14.5° to 30°
Inspection documentation: Dimensional verification of components before release · Prior drawing approval when required by the customer · Formal response to inspections and non-conformities · Return invoice for parts received for industrial processing

How we work

From drawing to finished part

A direct flow, from the first contact to the release of the checked component.

01
Send drawing, photos or sample
Describe the component and the problem to solve. A physical sample is enough when there is no drawing.
02
Technical analysis and quotation
We assess geometry, material and application, then send the proposal with the agreed scope.
03
Manufacturing or reconditioning
The part is machined, manufactured or reconditioned according to the approved scope.
04
Check and release
We run the dimensional check, confirm release for collection and issue the return invoice.

The process may vary according to the complexity of the project.

Technical gallery