What Is Sprocket Pitch? Definition, Standard Sizes, and Why It Has to Match Your Chain
Sprocket pitch is the distance from the center of one tooth to the center of the next measured along the sprocket’s pitch circle It has to match the pitch of the roller chain running over it exactly chain pitch being the distance between the centers of two adjacent roller pins or the…
What Is Heat Treatment?
Heat treatment is the controlled heating and cooling of a material usually metal to change its physical or mechanical properties without significantly changing its shape It’s how the same base alloy can end up hard and wear resistant in one part and soft and ductile in another depending entirely on how it’s…
What Is Lift TIG Welding?
Lift TIG also called lift arc is a way of starting the arc in TIG GTAW welding the tungsten electrode touches the workpiece and the instant it’s lifted away the machine senses the separation and ramps current up from a low sensing current to full welding current A lift TIG welder is…
How to Apply Black Oxide Coating
Applying black oxide follows the same basic sequence whether it’s done in a production shop or on a small home setup clean the part rinse immerse it in a black oxide chemical bath to convert the surface rinse again then seal with oil or wax The version that scales to industrial production…
Tap Drill Size Chart: 1/4-20, M8, 3/8-16, and Other Common Sizes
The tap drill size is the hole diameter you drill before cutting internal threads get it wrong and you either strip the tap trying to cut too much material or end up with threads too shallow to hold load For the three sizes covered most often on a shop floor a 1…
What Is BSPP? British Standard Pipe Parallel Explained
In pipe fitting and hydraulic pneumatic contexts BSPP stands for British Standard Pipe Parallel an ISO 228 1 standard for straight non tapered pipe threads commonly marked with the letter G e g G1 2 G1 4 It’s unrelated to the British Society for Plant Pathology an academic organization that shares the…
Right-Hand Thread vs. Left-Hand Thread: What’s the Difference?
A right hand RH thread tightens clockwise and loosens counterclockwise this is the standard used on the vast majority of bolts nuts and screws A left hand LH thread is the mirror image it tightens counterclockwise and loosens clockwise The two aren’t interchangeable a right hand nut will not thread onto a…
What Is a Drill Size? How Fractional, Metric, Number, and Letter Drill Sizes Work
A drill size is the diameter of a drill bit expressed in one of four naming systems fractional inches metric millimeters number wire gauge 1 to 80 or letter A to Z Which drill size is correct for a given job depends entirely on what you’re drilling for a pilot hole a…
What Is the Tensile Strength of Steel?
Steel doesn’t have one tensile strength it varies by grade alloy content and heat treatment roughly spanning 360 MPa to over 2 000 MPa 52 000 290 000 psi across the full range of commercial and specialty steels A plain structural grade like A36 sits at the low end of that range…
What Is Left-Hand Thread?
Left hand thread also called reverse thread is a screw thread that tightens counterclockwise and loosens clockwise the opposite of the standard right hand thread used on most fasteners It’s not a defect or a mistake it’s a deliberate design choice used in specific situations where a normal thread would work itself…
How to Measure Thread Pitch (and Calculate Pitch Diameter)
Thread pitch is the distance from one thread crest to the next measured along the fastener’s axis Metric fasteners state it directly in millimeters a 1 5 mm pitch inch fasteners state it as TPI threads per inch instead The two are just inverses of each other TPI 25 4 pitch mm…
What Temperature Does Stainless Steel Melt At?
Stainless steel doesn’t have a single melting point because it’s an alloy of iron chromium nickel and other elements it melts gradually across a temperature range rather than at one exact temperature the way a pure metal would Most stainless steels melt somewhere between about 1 370 1 530 C 2 500…