Precision Ground Stainless Steel

Centreless Bar Grinding

Bird stainless Ltd have over 25 years of, hands on, grinding experience that has provided a top class service to their ever growing customer base. This experience enables them to offer a very high quality product at a competitive rate and with a dedicated team of skilful grinding operatives and setters.

Significant time and effort has gone into implementing a continual improvement program and procedures that are being assessed to meet ISO 9001:2008 Quality requirements. It is this attention to detail that means your free issue material will be ground exactly as required time after time.

With a commitment to investment in both new equipment and personnel as and when required Bird stainless Ltd are well placed to meet the most demanding of Centreless Grinding jobs, no quantity would be considered too small or too large.

Our Precision Grinding facility consists of 5 Lidkoping Centreless Grinding machines, 2 straightening presses and 2 polishing lines Bird Stainless Ltd have machines capable of grinding bars from 3mm diameter up to 203mm diameter and in lengths from 2800mm to 10000mm meeting all of your size requirements and supply your precision ground shafts to very tight tolerances.

Bird Stainless Ltd has all the necessary equipment in place to offer a fast reliable and efficient service on all types of centreless ground stainless steel bar for a wide range of industries.

For Marine applications we have a worldwide reputation for the supply of bar product for the production of propeller shafts.

Typical tolerances include:

  • 1mm per 1,000mm on the straightness
  • 32 CLA maximum on the surface finish

Typical grades supplied include:

  • F51 - 316L - 17/4 PH - 304L - 321 - 420 - 431
  • Maximum diameter - 203mm / 8"

Prior to despatch all our shafts are inspected, netlon sleeved and/or wrapped and/or boxed to ensure their safe arrival.

We can also supply material with complete with 3rd party inspections such as LRS, DNV, ABS, BV, RINA, GL and many more.

For Engineered Components we can supply precision ground bar materials to close tolerances. With 5 centreless grinders, we are capable of providing fast lead times. With our automatic bar feeders in combination with high production grinders it gives us the capacity to handle high volume contracts. We can supply bar from to 3mm dia to 50 mm dia in lengths of 3 mtrs to 8 mtrs with a tolerance 0.0005" and a surface finish of Ra 35 or better.

To ensure consistent surface finish we have invested in new and improved surface roughness measurement equipment. For the sake of versatility we decided that model SJ-210 from Mitutoyo offered the best all round solution. We purchased two new machines which measure the surface whilst bar is in production and then save the results via computer to allow reporting within the certification package to the customer.