Turned, Ground and Polished Shafting (TG&P)

Industrial Tube & Steel Corporation stocks 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.  I.T.S. stocks both standard and metric sizes 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. Turned, Ground and Polished Precision Shafting is normally produced undersize of nominal, which lends favorably to fit standard bearings.

Manufacturing Process

TG&P 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.

Stocked Size Range

  • Metric: From 5 mm to 200 mm
  • Standard: From 0.188” Dia to 9.000” Dia.

Surface finish

  • Typically, 20 Ra max.

Packaging

  • Individually plain cardboard tubed for protection.

Grades Stocked

Straightness

  • .001″ per foot max.

Benefits of Turned, Ground and Polished Shafting (TG&P)

Tolerances

TG&P offers excellent tolerances as close as +0/-.0005” on the diameter.

Straightness

Due to the applications of this product, TG&P is straightened to within .001” per foot maximum.

Time Savings

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. 

Money Savings

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.   

Applications by Industry

Construction & Heavy Equipment

  • Piston Rods, Bolts, Crankshafts, Driveshafts, Feed Screws, Axles

Agriculture

  • Piston Rods, Driveshafts, Crankshafts, Bolts, Feed Screws, Axles

Infrastructure

  • Rolls, Journals, Bolts

Fluid Handling 

  • Pump Shafts

Machinery

  • Arbors, Journals, Spindles, Pins, Feed Screws

Oil & Gas

  • Gears, Piston Rods, Multiple shaft applications

Energy

  • Gears, Wind Turbine Shafts, Stub Shafts

General Fabrication and Machining

  • Gears, Trunnion Wheels, Mandrels, Sockets, Any application where a shaft is required

Automotive & Transportation

  • Crankshafts, Driveshafts, Piston Rods, Wrist Pins, Stub Shafts, Axles, Torsion Bars
Typical Manufacturing Undersize Variation Tolerances (TG&P Bar)
Size Range (Dia. in Inches) .003" .002" .0015" .001" .0005"
1-1/2" and Under       Standard Available
Over 1-1/2" to Under 2-1/2"     Standard Available Available
2-1/2" to 3" Incl.   Standard Available Available  
Over 3" to 4" Incl. Standard Available Available    
Over 4" to 6" Incl. Standard Available Available    
Over 6" to 8" Incl. Standard Available      
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