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.
Grinding is a method to obtain a certain surface or fine tolerances.
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.
- Posted: 15 Nov 2017 Due: 22 Nov 2017
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.
- Posted: 13 Oct 2017 Due: 19 Oct 2017
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.
- Posted: 23 Aug 2017 Due: 20 Sep 2017
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.
- Posted: 19 Jun 2017 Due: 23 Jun 2017
This manufacturer of coffee tampers, who spends £150,000 per year on all outsourced services, urgently seeks a supplier with immediate capacity to lap the attached stainless steel turned parts. Please be aware that the first batch of parts are required on the 8th June, followed by a second batch on the 13th June.
- Posted: 31 May 2017 Due: 02 Jun 2017
Outsourcing over £10,000 worth of machining work each year, this company is looking to place an order for the surface grinding of free-issue laser cut blanks. The parts in question are destined for end use within the plastics engineering industry, with 2 off required at this time. This enquiry forms part of a larger job for which the client is currently quoting and subsequently, they are keen to have an understanding of associated costs and lead times, before order placement in the near future.
- Posted: 31 Mar 2017 Due: 07 Apr 2017
Centreless grinding of free-issue steel is needed, on behalf of a Qimtek member whose spend on bespoke machined components exceeds £35,000 a year. The component itself exceeds 5.5 metres in length - a new design, for which there is no current supplier. Interested companies are asked to make contact with the buyer by the end of the month, quoting their best price and lead time.
- Posted: 22 Feb 2017 Due: 28 Feb 2017
Centreless grinding of press tie bars is required, on behalf of an industrial machinery client that spends £20,000 a year on bespoke machined components. This is outside of the client's in-house capabilities and therefore, they are keen to hear from suppliers who are able to undertake the requirement on a one-off basis. They may also have similar work available for the chosen supplier moving forward.
- Posted: 14 Feb 2017 Due: 17 Feb 2017
This is an urgent request for quote from a buyer who requires Surface Grinding to be carried out on blade flats. The Buyer has historically done this job without the grinding being necessary, however their client has since changed the process and they do not have the facilities to do this in-house. The material is Gauge Plate 2mm thick.
- Posted: 07 Feb 2017 Due: 08 Feb 2017
Standout opportunity to work with a buyer that spends a massive £6million every year on bespoke machined components. They are looking for a new supplier for their ongoing grinding requirements and currently need quotes on centreless grinding of molybdenum and tungsten rods. This project is not to be missed by those who are looking to supplement their long-term customer base with big-spending names. Interested companies are asked to make contact with the buyer by mid-February if they feel they can assist.
- Posted: 27 Jan 2017 Due: 17 Feb 2017
Rolwey Group Ltd comprises of 4 companies: Blue Diamond Technologies Ltd, Race-Tec Sealing Ltd, PTF Engineering Ltd and Stella-Meta Ltd.
Blue Diamond Technologies Ltd:
As founder member of the Rolwey Group, we pride ourselves on working with our customers to achieve the results they need. In principle, we’re problem solvers. We get involved when standard products and solutions just won’t do. In short, we’re all about – Making Things Better!
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