Cast-Iron Counterweights for Equipment

02A CLEARER CASTING PURCHASE

Shaped balance blocks with finished mounting surfaces

Relia offers OEM/ODM cast-iron counterweights from customer drawings, including sand/vacuum-casting requests and a related grey-iron lost-foam range. Casting, machining, painting and custom colour are available within the relevant product scope. Our main foundry route is coated-sand or shell moulding, with the actual route chosen for the counterweight geometry rather than imposed on every size and shape.

For a machinery OEM, the benefit is one component definition from cast body to mounted and painted block. The related grey-iron listing permits a one-piece enquiry, which can support initial development without turning that quantity into a rule for every counterweight. Relia’s new-part process is drawing review, sample manufacture and inspection, your confirmation, then batch production. Real equipment photographs and dimensional or material reports can support your supplier assessment.

04A CLEARER CASTING PURCHASE

Recesses influence both fit and mass distribution

A recessed upper region can provide installation space, reduce local mass or accommodate a connected structure. Its purpose should remain visible in the drawing. Removing material from one side affects distribution differently from removing the same amount symmetrically.

Mark surfaces that cannot move and regions where the design permits adjustment. If machining is proposed to reach the final mass, identify the permitted correction zone and limits before manufacture. Uncontrolled grinding at the mounting face could change the installed position; a permitted mass-correction area keeps that adjustment away from the functional seating geometry.

Recess purpose

Clearance, connection or mass distribution

Correction zone

Keep adjustments away from mounting datums

06A CLEARER CASTING PURCHASE

Mass acceptance uses an identified weighing condition

State whether acceptance applies to the bare casting, machined block or painted component, and whether fittings are included. A shipping gross weight includes packaging; it is not the net mass of the counterweight. The weighing record should identify the component, result, units, scale and acceptance limits, with tare treatment where supports or packaging are present.

Scale resolution and calibration suitability need to match the required mass decision. Separately inspect mounting and envelope dimensions: a correct mass result cannot establish that a block seats correctly. Where centre-of-gravity evidence is required, specify its measurement or calculation basis as another distinct characteristic.

07A CLEARER CASTING PURCHASE

The installed envelope protects service access

Counterweights often wrap around equipment structures rather than form simple solid blocks. Show the full outside contour, cut-outs and rear-side interfaces, including access needed to install fasteners and remove neighbouring covers. Check those restrictions in the installed orientation.

A proposal that changes a radius or local wall may still meet an overall length and width while affecting access or the position of the centre of gravity. Use section views and controlled profiles for these regions. We can then review manufacturing details around the intended envelope without changing its equipment function.

08A CLEARER CASTING PURCHASE

Finish and dimensional acceptance share one release

Casting, machining and painting are named for the balance-block listing; sandblasting is named for the related gray-iron range. Specify preparation, colour, coverage and the required final appearance. Mask locating contacts and fastening interfaces where the drawing requires bare material or a controlled coating condition.

Record the mass acceptance stage alongside these operations. The unqualified catalogue tolerance reference of 0.02 is not a complete drawing requirement; meaningful limits need a unit, characteristic and finished stage. A feature-specific inspection schedule makes the quotation comparable and avoids confusing a surface finish request with an installation tolerance.

09A CLEARER CASTING PURCHASE

Delivery supports protect the heavy component

A counterweight should rest on agreed support areas that keep it stable and protect its machined contacts. Timber blocks and spacers in the illustration show the principle of separation; the actual support and restraint arrangement must suit the ordered geometry and shipping method. Carton, wooden-case and customized packing are catalogue options.

Define receiving access, package orientation and the surfaces that may carry transport contact. Keep the component identity accessible without disturbing the load. This helps your receiving team relate the block to the weighing and dimensional records while planning its approved unloading and installation method.

Support

Agreed stable contact areas

Receiving record

Part identity and weighing condition

10A CLEARER CASTING PURCHASE

The quotation retains the balance design

Send the released model with target mass and permitted variation, the selected grade and the intended installed position. Add centre-of-gravity requirements where the equipment design needs them, plus mounting dimensions and any permitted mass-adjustment zones. We can then quote the relevant casting, machining and finish package.

Agree the test-report contents before production: the catalogue provides a report, while the order determines the relevant characteristics and acceptance criteria. For a first component and subsequent batches, retain the same mass state, mounting references and packing arrangement so comparisons remain meaningful.