We stock precision Turned, Ground and Polished (TG&P) steel shafting to tolerances as tight as .0005”. Starting as small as 0.197″ (5mm) and moving all the way up to 9” diameter, with lengths typically stocked at 12 or 24 feet long. Our inventory consists of both standard and metric dimensions in grades 1045, 4140HT, 303 SS, and 316 SS. Many sizes are available for immediate delivery, and special sizes can be produced to your specifications. Our TG&P bars meet or exceed the standards set forth by ASTM A108. Turned, Ground and Polished Precision Shafting represents the highest degree of over-all accuracy, concentricity, straightness, and surface perfection attainable in commercial practice. TG&P is normally produced undersize of nominal, which lends favorably to fit standard bearings.
Turned, Ground, and Polished shafting starts with either a hot rolled or cold drawn bar being turned in a lathe where material is taken off. The turning continues until the steel bar is brought down to the desired size. Multiple passes may have to be made until the desired size is reached. After being turned, the surface condition is still relatively rough which could cause uneven wear and balancing issues. To remedy that, the bar is then ground with a grinding wheel to take a much smaller amount of material off. Once the dimensions of the bar are acceptable, it is then polished using a polishing wheel. This polishing process gives it the smooth surface finish required and it now has become a Turned, Ground & Polished shaft.
TG&P offers excellent tolerances as close as +0/-.0005” on the diameter. Click here to learn more about TG&P Bar Diameter Tolerances.
Due to the applications of this product, TG&P is straightened to within .001” per foot maximum.
By getting the material already Turned, Ground and Polished, it saves a tremendous amount of time for the end user which allows them to focus on their business.
By purchasing TG&P shafting, it allows you to save a tremendous amount of money that would otherwise be spent on equipment, labor, material, and time to produce in house.
Typical Manufacturing Undersize Variation Tolerances Available (TG&P Bar)
*NOTE* Other sizes available upon request
|Size Range (Dia. in Inches)||.003"||.002"||.0015"||.001"||.0005"|
|1-1/2" and Under||Available||Available||Available|
|Over 1-1/2" to Under 2-1/2"||Available||Available||Available||Available|
|2-1/2" to 3" Incl.||Available||Available||Available|
|Over 3" to 4" Incl.||Available||Available||Available|
|Over 4" to 6" Incl.||Available||Available||Available|
|Over 6" to 8" Incl.||Available|