News / Industry Resources

Comparing Cold Finished Bars

CD vs T&P

The choice of CD vs T&P (cold drawn versus turned & polished) Not all cold finished steel is the same. While cold drawn and turned & polished steel bars have similarities, they are actually different in many ways. Depending on the final end use of the steel, one product may vastly outperform the other. Cold drawn steel will always machine better and have better mechanical properties. Turned & polished will always be free of surface defects and decarb. If a machinist is familiar and used to processing cold drawn steel and suddenly switches to T&P, they will notice reduced tool …

See us in the December 2023 issue of Metal Center News

Northlake cold finished cold drawn TGP

Click here to read December’s MCN Northlake Steel is producing the full line and range of cold finished steel products: Cold drawn (thru 6″), Turned Ground & Polished (thru 16″), Turned & Polished, Case Hardened Linear Shafting, and Chrome Plated / Induction Hardened Chrome Plated Bars. Contact us today for a quote!

What’s a Cold Finished Steel Bar?

Types of Cold Finished Bars: Many times we hear the term “cold finished” in the steel industry, but many times people will wonder, “What’s a Cold Finished Steel Bar, exactly?”  There are three main types of cold finished (CF) categories.  First, are cold drawn (CD) bars, which represent the largest in the way of tonnage.  The second type is turned & polished (T&P) bars.  The third type is turned, ground & polished (TG&P) bars.  While there are other variations on these types, such as cold drawn + turned & polished (CD-T&P), turned & ground (T&G), and others, they are just variations on the main three …

How is Cold Drawn Steel Made?

Of all “cold finished” steel bars, cold drawn bars make up the largest production in the way of sheer tonnage and usage.  “Cold finished” bars consist of cold drawn , turned ground & polished, turned & ground, turned & polished, or rough turned.  Cold drawn bars are used in high volume productions of machined parts as well as shafting and other applications.  Their mechanical and dimensional properties give them an appeal over hot rolled bars.  Below we will answer the question, “How is cold drawn steel made?” There are many benefits to using cold drawn steel as compared to hot rolled …

Surface Finish of Cold Finished Steel

In previous posts we’ve discussed the features of cold finished steel bars.  Now we’ll get into more details of one important feature, which is the surface finish of cold finished steel. You can review what a cold finished steel bar is here:  What’s a Cold Finished Steel Bar? Surface Finish Probably the easiest of the features to see and verify on a cold finished bar is it’s surface finish.  One can easily recognize the difference in finish when comparing a cold finished bar to a hot rolled bar. A hot rolled bar comes out of the mill (produced at temperatures of …

Out of Roundness

Out of Roundness on Cold Finished Steel Products Let us first understand that it is not sufficient just to measure the diameter of the shaft in different places with a micrometer, with the difference in readings representing out of roundness.  There will be consequences to this; the most being it can affect the fit between components (ie: a bearing on a shaft).  To accomplish accurate out of roundness readings, the v-block is the most widely affordable and accepted for shop purposes.  This technique is done by placing the shaft in a v-block, then rotating it while in contact with a …

Ra Surface Finish and Roughness Average

When measuring how smooth a turned, ground & polished (TGP), chrome plated hydraulic cylinder rod, or any other cold finished bar, the primary reading or parameter used is Ra surface finish.  There are many other parameters to measure surface finish by, a number well over 100.  But today we will focus on this most common in the cold finished steel bar industry, Ra surface finish. What is Surface Finish? In a nutshell, surface finish is how smooth or rough the surface of the bar or other medium is.  The smoother the finish, the lower the Ra number will be.  If you …

Hydraulic Cylinder Rod and Chrome Plated Bar

Are you searching for hydraulic cylinder rods?  You’ve come to the right place.  Northlake Steel manufactures chrome plated (CPO) and induction hardened + chrome plated (IH-CP) cylinder rods.  All of our bars are produced using precision centerless grinding and polishing methods, giving us the ability to produce the highest quality hydraulic cylinder rods around. What we produce and offer: Diameter CPO: up to 16″ Rd.  Imperial and metric sizes. Diameter IH-CP: up to 12″ Rd.  Imperial and metric sizes. Length: We carry lengths on the floor to 45′ long, and can produce to even longer lengths upon request and review. …

Shafting Ground Finer than a Human Hair

“Precision Shafting Ground to a Tolerance Finer than a Human Hair.” ® Here at Northlake Steel, we take pride in our ability to produce the highest quality steel shafting ground finer than a human hair. We coined the phrase “precision shafting ground to a tolerance finer than a human hair.”® What we mean by this is that a typical human hair is 0.004″ thick.  As you know from your own hair, this is very, very thin!  With our precision grinding and polishing techniques, we’re able to hold steel bar size tolerances to as close as 0.0002″ (two ten-thousandths of an inch).  This …

We make big bar! TGP, CPO, IHCP, CD, Linear Shafting

Need big bar precision ground or cold finished steel? Look no further than Northlake Steel! We pride ourselves on our capability to produce ground, polished, & chrome plated big bar up to 16″ diameter and 75′ long.  Don’t forget we can induction case harden (IH) up to 12″ diameter x 75′ long as well! Click here for big bar TG&P Click here for big bar CPO & IH-CP chrome plated rounds.

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