Process: Grinding


Grinding is a method to obtain a certain surface or fine tolerances.

When grinding, a grinding stone or grinding wheel is rubbed against a component. This changes the component's surface, either to increase tolerances or to achieve nice surfaces or reduced friction.

Grinding is also used for cutting purposes, especially for shallow cuts when milling is inappropriate. Even though grinding is commonly used to improve surfaces, it is suitable for mass production when machining large amounts of components or materials.

There are several methods of grinding and grinding machines. The two main categories of grinding are surface grinding and cylindrical grinding, of which surface grinding is the most common one. Then a rotating grinding wheel is used to acheive flat surfaces. The wheel can be have different shapes depending on what kind of component is grinded. When the wheel rubs the workpiece a flat surface is created. On the other hand, cylindrical grinding uses a round-shaped grinding stone to grind cylindrical shapes with high precision. Cylindrical grinding, also known as center-type grinding, is usually external but internal grinding also occur.

There are several subcategories, for example, centerless grinding. Centerless grinding machines have no centres or chucks, instead components are supported by a blade and a regulating wheel, which controls the components rotation.

Each grinding machine has at least one grinding wheel or grinding stone, which consists of an abrasive and a bonding agent. The composition depends on the material of the component and the purpose of grinding.

Usually, every workshop has grinding machines or co-operations with grinders. If a grinding job is complex or a large, there are specialized grinding workshops.

Post project to suppliers with Grinding capabilities

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E.g., 25/09/2018
E.g., 25/09/2018
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Grinding projects for quote

  1. Drawings count: 2


    Surface grinding of free-issue pins is needed, on behalf of a company that places £40,000 a year into the subcontract machining market. They are outsourcing this process due to a current lack of in-house capacity and would like to speak with suppliers that can offer a high level of quality, as well as good value. There is an immediate order to place for 500 off, which the client has advised is very likely to repeat moving forward.

  2. Drawings count: 1


    Centreless grinding of silver steel bar is needed, in order to make the attached tower jig pin. The client - a company that places £100,000 into the subcontract machining market annually - seeks the assistance of a supplier that can offer a high standard of quality and reliable delivery. They have an immediate order to place for 10 off of this design, which could result in further work being placed with the successful supplier moving forward.

  3. Drawings count: 1


    Centreless grinding of brass valve lift spindles is needed, on behalf of a company that outsources machining work to the tune of £50,000 per year. They have an immediate order to place for this work, with delivery of the completed set of 272 off components required by the end of April. Moving forward, this will become an ongoing requirement, paving the way for the chosen supplier to develop the relationship and gain a new long-term customer.

  4. Drawings count: 1


    Destined for end use within a medical application, the three attached parts require surface grinding in accordance with the client's specifications. They have an immediate order to place for 1 off of each component. The successful supplier will be responsible for sourcing the material and performing the required process, before delivering prior to the end of April 2018.

  5. Drawings count: 2


    Qimtek members are invited to quote for the grinding of free-issue components. The company behind this enquiry outsources machining work to the tune of £20,000 a year and has an immediate order to place for 100 off of each item, with potential for repeat orders at a later phase of the project. Those with the ongoing capacity available to assist are asked to contact the buyer directly to discuss.

  6. Drawings count: 5


    This project calls for grinding to be carried out on a set of free-issue cast machine slides. The nature of the client's business is machinery design and maintenance and thus, they would like to employ the assistance of a third party for repeat orders of the work in question, which is to be carried out to a high standard of quality. Owing to the client's £40,000 machining spend, there may be scope to assist the buyer with additional work alongside this project.

  7. Drawings count: 5


    This company's existing grinding supplier has experienced a machinery breakdown and as a result, quotes are required from Qimtek members for the attached set of four parts. These will all be free-issued, ready to be ground in accordance with the drawings provided. Sizeable quantities of these parts are needed across the set, for which there is an immediate order to place. Suppliers are asked to make contact with the buyer directly to discuss - owing to the client's £70,000 spend on subcontract machining, vendors may also be considered for other projects.

  8. Drawings count: 3


    This company seeks the assistance of a third party that can remove the plating from one end of an array of mild steel studs. These will be free-issued in large quantities to the successful supplier, meaning that the work may be best suited to those that have an automated process in place. The client spends over £300,000 a year in the subcontract machining sphere and could also request the assistance of the chosen vendor within additional projects, to run alongside this ongoing requirement.

  9. Drawings count: 1


    Grinding of a shaft for an aircraft fuel pump is needed, by an aerospace company that spends a sizeable £500,000 a year on outsourced machining. They are looking to partner with a supplier that can work with them on a long-term basis, meaning that there is plenty of scope to develop the relationship and diversify into additional requirements. Suppliers that would like to assist with this project should make contact with the buyer directly in order to be considered, quoting their best price and lead time.

  10. Drawings count: 1


    Grinding of free-issue EN1A blanks is needed, on behalf of a manufacturer of hydraulic equipment that outsources machining work to the tune of £500,000 every year. The buyer would like to partner with a company that can offer a fast turnaround on this work, with delivery needed within five days of order placement. This may make the project especially well-aligned with suppliers that have immediate capacity to fill. Moving forward, this will become a repeat order and the chosen supplier may also be given the opportunity to collaborate with the buyer for the production of similar items.

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