The Technical Resource for CNC Machinists
Practical guides, calculators, and buying advice written by machinists — covering mills, lathes, cutting machines, tooling, workholding, and shop metrology.
7 Topic Areas
What Are You Working On?
Deep technical content organised by machine category and process.
Silo 1
CNC Mills
VMCs, benchtop mills, 4th/5th-axis machining, and used-machine buying guides.
Silo 2
CNC Lathes
Turning centres, swiss-type lathes, bar feeders, and live tooling setup.
Silo 3
Cutting Machines
Fiber laser, plasma, waterjet — power selection, assist gas, and cut quality.
Silo 4
Sheet Metal
Press brakes, tonnage calculation, bend allowance, and tooling selection.
Silo 5
Cutting Tools
Carbide inserts, end mills, chip load, chatter reduction, and tool life.
Silo 6
Workholding
Zero-point systems, vises, soft jaws, and fixturing for high-mix production.
Silo 7
Inspection & Metrology
GD&T, true position, surface finish Ra/Rz, CMMs, and hand gauges.
Free Calculators
Run the Numbers Before You Cut
Interactive tools built on real engineering formulas — no sign-up required.
Sheet Metal
Press Brake Tonnage Calculator
Enter material, thickness, bend length, and V-die opening. Outputs required tonnage plus a 20% safety margin. Formula: T = (L × t² × Rm) / (8 × V).
Calculate tonnageCutting Tools
Chip-Thinning (RCTF) Calculator
Find the radial chip thinning factor for high-efficiency milling passes. Outputs adjusted feed per tooth, spindle speed, and MRR.
Calculate RCTFLatest Guides
In-Depth Technical Articles
Sheet Metal
Press Brake Tonnage Calculation: The Complete Guide
Full walkthrough of the tonnage formula, material tensile strengths, V-die selection, and a reference chart for mild steel 0.5–12 mm.
Read guideMetrology
True Position GD&T: Tolerance Zones, MMC, and How to Inspect
What the position symbol means, how cylindrical tolerance zones differ from ± tolerances, and step-by-step inspection with a CMM or surface plate.
Read guideCutting Tools
How to Reduce Milling Chatter: 9 Proven Fixes
Diagnose regenerative vs. forced chatter, then apply the right fix — spindle speed, tool overhang, radial depth, toolpath strategy, or dampened tooling.
Read guideCNC Mills
Best Benchtop CNC Mill: Buyer's Guide for Prototype Shops
Tormach 1100MX, Haas Mini Mill 2, SYIL X7, and Datron M8Cube compared on work envelope, spindle power, and repeatability.
Read guideCutting Machines
Plasma vs Fiber Laser vs Waterjet: Which Cutting Process?
Side-by-side comparison of cut quality, operating cost, kerf width, and material range to help you choose the right cutting process.
Read guideWorkholding
Zero-Point Clamping Systems: Setup, ROI, and Top Brands
How pneumatic zero-point pallets achieve <0.005 mm repeatability, reduce setup time by 80%, and pay back in under 6 months in a high-mix shop.
Read guideEvery article is reviewed for technical accuracy by a working machinist before publication. We cite manufacturer data, ASME standards, and ISO specifications — never marketing copy.
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