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Design
guidelines.

The details shape the part.

Make the details work. Practical rules for CAD files, material selection, dimensions, tolerances, and production-ready parts.

Start with a question

All guidelines.

69 guidelines
Return flange access comparison using the real OW202/S punch profile
Bending / Original CAD examples
Better bends start in the model.
Explore eight bending checks with real tool profiles and Onshape comparisons. Inspect tool access, then see why an overbend opens to the finished angle after springback.
BendingOnshape modelsInteractive 3D
Representative steel parts: cut plates, a sprocket, and a formed bracket
Materials / Grade selection
Carbon steel. The grade changes the part.
Compare the steel materials in the Xeon NC catalog: A1008, galvanized steel, A36 / A1011, Grade 50, Corten, AR500, and spring steel. Explore their tradeoffs in an interactive radar viewer.
Carbon steelRadar viewerGrade explorer
Representative aluminum parts: perforated plates, mounting profiles, and a formed bracket
Materials / Alloy selection
Aluminum. The alloy changes the part.
Compare aluminum alloys and tempers with an interactive radar viewer. Explore 1100, 3003, 5052, 6061, 2024, and 7075 through strength, forming, machining, welding, and corrosion.
AluminumRadar viewerAlloy explorer
Xeon SheetForm preview: bring the press brake into the design review, using the Jeep test part
Engineering tools / Preview
Bring the press brake into the design review.
Use the Xeon Jeep to follow SheetForm from STEP import to tooling, sequence simulation, and the warnings that guide the next revision.
SheetFormBendingJeep walkthrough
Stainless steel. The grade changes the part. A Xeon guide to stainless steel grades.
Materials / Grade selection
Stainless steel. The grade changes the part.
Understand stainless steel grades through corrosion, forming, welding, and load. Compare 304L, 316L, 430, 301, 2205 duplex, and 17-4 PH before specifying sheet metal.
Stainless steelGrade explorerMaterial selection
Why good parts don’t fit.
Design / Assembly engineering
Why Good Parts Don’t Fit: Sheet Metal Tolerance Stacks
Calculate assembly clearance across formed sheet metal, mating parts, and coatings. A worked tolerance stack, interactive calculator, and inspection checklist.
AssemblyTolerance stacksFinish allowance
Choose the joint before the hole.
Design / Assembly engineering
Threads in Thin Sheet: Choose the Joint Before the Hole
Choose tapped sheet, self-clinching nuts, rivet nuts, or through-bolts by load path, tool access, service requirements, and finishing sequence.
HardwareAssemblySheet Metal
Stiffness comes from shape.
Design / Assembly engineering
Stiffness Comes from Shape: Designing Lighter Sheet Metal Parts
Design sheet metal for stiffness with clear load cases, section depth, return flanges, shorter spans, and a worked cantilever calculation.
Sheet metalStructural designStiffness
The enclosure is a system.
Design / Assembly engineering
The Enclosure Is a System: Fit, Airflow, and Service Access
Design sheet metal enclosures around mating datums, coating allowance, cooling paths, cable access, and service sequences. Includes a practical release review.
EnclosuresAssemblyThermal planning
Make the next batch repeatable.
Design / Assembly engineering
From Prototype to Repeat Order: Build a Production Release That Holds Up
Turn a successful sheet metal prototype into a controlled repeat order with a release package, revision rules, inspection plan, and downloadable register.
Production releaseRevision controlInspection
Factory-floor illustration showing metal coils, sheet-processing equipment and stacked flat stock
Materials / Manufacturing Insights
Standard Sheet Metal Sizes: Design Around the Sheet
Compare stock formats, understand custom cut-to-length costs, and see how flat-pattern dimensions change material yield.
Stock sizesNesting
Vernier caliper measuring a metal block, with Measuring the Process text and a Xeon NC caliper line drawing
Design / Manufacturing Insights
Sheet Metal Tolerances: CNC & 3D Printing Compared
Understand flat and formed tolerances, see how angle moves a mounting point, and specify a fit each process can verify.
TolerancingProcess comparison
Xeon press-brake tools for planning box height
Bending / Design Calculator
How Tall Can Your Box Be?
Compare Xeon’s five punches in a live 2D section. Estimate maximum inside box height, understand holder clearance, and check an opposing wall against the tool.
Box HeightPunch ClearanceCalculator
Laser-cut carbon steel parts illustrating hot-rolled, pickled and oiled, and cold-rolled steel options
Materials / Process
Hot-Rolled vs. Cold-Rolled vs. HR P&O Steel: How Each Is Made
One slab, three products. See what the hot strip mill, the pickling line, and the cold mill each do to the steel, then choose between the A36 / A1011 and A1008 options Xeon stocks.
Mill Process A36 · A1011 · A1008 Material Selection
Laser-cut aluminum parts illustrating aluminum alloy and temper selection
Materials / Reference
Aluminum Alloy & Temper Designations Explained
Decode 5052-H32, 6061-T6, T651, T6511, and more—then see how the complete designation changes bending, machining, welding, ordering, and drawing callouts.
Temper Decoder H + T Codes ANSI H35.1
CNC-machined aluminum part for a 6061 and 7075 alloy comparison
Materials / Alloy Selection
6061 vs. 7075 Aluminum: Which Alloy Should You Use?
Compare strength, stiffness, machining, welding, corrosion, anodizing, forming, cost, and drawing callouts—then choose the alloy around the part’s real requirement.
6061-T6 7075-T651 Decision Guide
Plan view of a tab seated in its slot, with the cutting clearance shaded on all four sides and dimensioned
Design / Reference
Slot & Tab Size Chart
Pick a material and a gauge and get the tab width, tab length, slot size and clearance we recommend — drawn to scale, with press fit, slide fit and our self-fixturing default side by side.
Interactive To Scale By Material
The laser's 59 inch cut width against the 48 inch maximum part width on the Weber 1350, with the 11 inch band between them marked
Finishing / Reference
Deburring Size Limits — Weber 1350
The processing window of our automated deburring line: 2″ minimum, 48″ maximum width, unlimited length, and the thickness range — plus which materials run, which need confirming, and which we exclude outright.
Interactive Weber 1350 By Material
Sheet outline showing the usable cutting area inside a half-inch handling margin on every edge
Materials / Reference
Minimum & Maximum Part Sizes
How small and how large a part can be, for all 126 SKUs we stock — with the three limits that decide it, and a checker that tests your flat blank against the whole catalog at once.
Interactive 126 SKUs Min + Max
Self-clinching PEM nut cross-section showing sheet material displaced into the fastener undercut
Hardware / Reference
Hardware Size Chart
Hole size, outer diameter, and part numbers for every self-clinching fastener we stock — nuts, flush nuts, studs, standoffs, blind standoffs. Pick your sheet material and gauge and the whole catalogue marks what will actually clinch.
Interactive By Material PEM
Countersink cross-section showing outer diameter, cone depth, and the land remaining under the cone
Fasteners / Reference
Countersink Size Chart
Outer diameter, through-hole, and cone depth for every 82° inch and 90° metric seat we tool — plus the number no fastener catalogue gives you: the minimum sheet thickness each size needs before the cone leaves a knife edge instead of a seat.
Interactive 82° + 90° Fit Matrix
Tap drill size chart showing thread, tap drill, and clearance hole diameters to scale
Threads / Reference
Tap Drill Size Chart
Tap drills, clearance drills, and minor diameters for every inch and metric thread — with a live thread-percentage dial instead of somebody else’s fixed 75% and 50% columns, and a sheet-thickness check that says whether the thread will actually hold.
Interactive Inch + Metric Thread %
Sheet metal gauge chart with sheet cross-sections drawn to scale
Materials / Reference
Sheet Metal Gauge Chart
Every gauge from 3 to 30 in inches and millimeters, for aluminum, mild steel, stainless, and galvanized — with cross-sections drawn to scale, a two-way converter, the thicknesses we stock, and a DFM Preflight on every gauge.
Interactive Gauge → mm To Scale
Enclosed TRUMPF fiber laser cutting machine
Laser Cutting
Complete Fiber Laser Cutting Design Guide
Everything you need to know to design parts for our fiber laser: file formats, tolerance stack-ups, minimum feature sizes, kerf compensation, and gang-sheet nesting strategies for production savings.
DXF ±0.005″ Aluminum Steel
DXF line drawing transitioning into a finished three-dimensional machined part
CAD File Preparation
STEP vs. DXF: Which File Should You Send?
DXF communicates a 2D cutting profile. STEP can carry the finished 3D part. Learn which format gives your fabricator the information needed to quote, validate, and manufacture your design.
STEP DXF Audio Guide
Everything You Need to Know About STEP Files guide cover
CAD File Preparation
Everything You Need to Know About STEP Files
A complete guide to STEP and B-rep geometry, AP203, AP214, AP242, export settings, feature recognition, automatic quoting, manufacturing simulation, and validation.
STEP AP242 CAD Handoff
DFM reference drawing labelling bend angle, inner radius, bend allowance, neutral axis and minimum flange support
Design Rules
DFM Rules & Error Code Lookup
Every warning our instant quote can raise, documented and searchable. Type the code from your quote and get the rule in plain English — what it means, why the process behaves that way, and exactly how to fix it in CAD.
166 Codes Lookup Tool DFM
Onshape flange with obround bend reliefs
Bending / Onshape
How to Design Bend Reliefs in Onshape
Three Onshape screenshot examples with formed and flat views. Compare obround and rectangular slots, understand width and depth, and inspect a full-width flange.
Bend ReliefOnshapeFlat Patterns
Drawing sheet with six flat-pattern views of sheet metal corner reliefs
Bending / Box Corners
Sheet Metal Corner Relief: Six Onshape Types Compared
One 0.125″ 5052 box, six corner reliefs. Formed corner and flat pattern side by side on drawing sheets, what each type is good for, what to watch, and how the demo inputs map to Xeon NC shop numbers.
Sized vs. Scaled Closed vs. Simple Onshape
Formed sheet-metal box corner with a laser-cut relief gap between two perpendicular flanges
Bending / Box Corners
How to Keep Perpendicular Corner Flanges from Colliding
Check relief-opening size, seam clearance and the forming sequence separately. Start with material-specific corner guidance and current bend data.
T − BD/2 + 0.015″ Die Calculator Box Corners
Three formed sheet-metal coupons comparing hole pull-through with bow-tie and straight-slit bend relief strategies
Bending / Controlled Deformation
Hole Pull-Through: Designing Controlled Deformation
When a critical hole cannot move away from a bend, a bow-tie relief can isolate it and a straight slit can redirect the strain. Both strategies can protect the feature. Both reduce local strength.
Bow-Tie Relief Relief Slit Strength Tradeoff
Press-brake die contact points beside a flat pattern showing the hatched hole keep-out band
Bending / Feature Placement
How Close Can a Hole Be to a Bend?
Two things ruin a hole near a bend: the metal stretching, and the die shoulder sitting under it. The second is usually the bigger number — and you can see it on your own part in the bend simulator.
0.63 × V Simulator DFM 3243
Press-brake punches and dies that determine the inside radius of a sheet metal bend
Bending / Inside Radius
Sheet Metal Bend Radius: How to Choose the Correct Inside Radius
In air bending the die makes the radius, not the punch. The five radii we actually form, why the 1T rule breaks inside a die band, minimum bend radius by alloy and temper, and everything that moves downstream when the radius changes.
0.16 × V Lookup Tool Min. Radius
Thin sheet metal bowing upward during fiber laser cutting with a technical heat and stress overlay
Laser Cutting / DFM
Why Laser-Cut Parts Warp
How residual stress, heat, geometry, and cut strategy interact—with a practical risk matrix and interactive warping preflight.
WarpingResidual StressInteractive
Countersunk plate in Onshape
CNC / Onshape Workshop
Countersinks in Onshape: Model, Check & Draw
Set the bore, cone, and entry side using Xeon’s tool table. Check the remaining material and create a technical drawing.
CountersinksOnshapeDrawings
Actual 5052 aluminum bracket used for a worked drawing example
Bending / Drawing Practice
How to Make a Sheet Metal Technical Drawing
A real Onshape bracket: inside radii, formed inspection dimensions, and flat development using Xeon’s 5052 tooling data.
Technical DrawingsOnshapeChecklist
Sheet metal part model beside its dimensioned technical drawing
Bending / Drawing Practice
How to Dimension a Sheet Metal Drawing
Where you put the datum decides which errors add up. Baseline vs chained dimensions, what to tolerance, and why an angle band becomes a length error at the flange tip.
Datums Tolerance Stacks Drawing Practice
CNC tooling and press-brake profile for the complete sheet-metal bending guide
Bending / Design Guidelines
Complete Sheet Metal Bending Guidelines
A production-minded guide to formed STEP files, bend data, minimum flanges, radii, hole spacing, reliefs, channels, tolerance stack-up, and preflight.
STEP DFM ±0.5°
Precision-machined demonstration part surrounded by CNC cutting tools
CNC Machining / Cutting Tools
CNC Milling Tools: Matching the Cutter to the Feature
How end mills, face mills, drills, ball-nose tools, thread mills, T-slot cutters, dovetail cutters, and lollipop tools create specific CNC features.
End Mills Holemaking Undercuts
Precision-machined aluminum component shown through stress analysis and CNC milling
CNC Machining / Tolerancing
Precision Machined. To the Thousandth.
How nominal dimensions become acceptance limits — including how ISO 2768 medium tolerances widen as the controlled dimension grows.
±0.001″ ISO 2768-m GD&T
Instant Quoting Design Guide
Getting Started
Instant Quoting Design Guide
A step-by-step walkthrough of the Xeon NC quoting platform — material selection, bend setup, hole processing, finishing options, document upload, and notes for the manufacturer.
Material Bendings Finishings RAL
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
CNC Press Brake Bending Guide
Bend allowance calculations, K-factor by material, minimum flange lengths, inside radius selection, and how to design multi-bend parts with accurate flat-blank dimensions.
K-Factor Bend Allowance
CNC milling spindle and cutting tool
CNC Machining
CNC Machining Design Guide
Internal corner radii, pocket depth ratios, thread call-outs, GD&T callout conventions, and surface finish selection for aluminum, steel, and engineering plastics.
Threads Tolerances GD&T
CNC countersink in 5052 aluminum sheet metal
CNC Machining / Calculator
Countersink Geometry Calculator
Live cross-section of a countersunk hole: 82° or 90°, outer diameter, through-hole, thickness, remaining land, and top or bottom side — from Xeon NC tooling tables.
82° / 90° Cross-section Calculator
Countersinking Guide
CNC Machining
Countersinking for Sheet Metal
When to countersink, mechanical benefits, thin material limits, choosing the correct angle (82°, 90°, etc.), and how to specify countersinks perfectly in CAD.
Fasteners Holes Design
Close-up of a laser-cut aluminum sheet-metal corner with a sharp knife edge
Surface Finishing / Safety
Breaking Sharp Corners on Sheet Metal Parts
Laser-cut blanks leave knife edges and needle corners. Recommended edge break and outside-corner radius by material and thickness — mostly so nobody gets cut unpacking the part.
R ≥ 0.5T Edge Break Safety
Deburring & Surface Finishing Guide
Surface Finishing
Deburring & Surface Finishing
Weber 1350 deburring operations: edge rounding, Scotch-Brite finishing, oxide removal, part size limits, and design rules for through-feed processing.
Weber 1350 Edge Rounding Scotch-Brite
CAD File Preparation Guide
Getting Started
How to Prepare Your CAD File
Accepted file formats (DXF, STEP, STL), step-by-step export guides for SolidWorks, Inventor, and Onshape, plus a pre-flight checklist for every service.
DXF STEP STL
A sheet metal part open in an Onshape Part Studio, ready to export as STEP
Getting Started
Exporting a Sheet Metal STEP File from Onshape
Every click and every setting, with screenshots — which AP version to pick, the units checkbox that silently scales your part by 10×, and why to send the folded model instead of a flat pattern.
Onshape STEP File Prep
Welder joining a T-joint for the Welding Symbols and Joint Types Guide
Weldment Design
Welding Symbols & Joint Types
A visual AWS-based guide to the arrow, reference line, basic weld symbols, supplementary marks, dimensions, contours, and the five foundational joint arrangements.
AWS Symbols Joint Types Visual Chart
Welding Defects and Laser Cut Design Tips Guide
Weldment Design
Welding Defects & Laser-Cut Design Tips
Diagnose 12 common weld conditions and design better laser-cut joints with intentional fit-up, assist-gas edge preparation, material selection, distortion control, and inspection access.
Weld Quality Joint Design Cut Edges
Heat-Affected Zone (HAZ) Guide
Laser Cutting
The Heat-Affected Zone (HAZ)
Understanding how thermal exposure alters material composition during laser cutting. Learn how thickness, hot spots, and density impact part hardness and warp.
Thermal Hardening Geometry
Laser beam alignment image with the kerf contour marked
Laser Cutting
Understanding Laser Kerf
Learn what laser kerf is, why software toolpath offset is critical, and how material thickness directly impacts your minimum allowable cut width and hole sizes.
Dimensions Accuracy Thickness
Powder Coating Guide
Finishing
The Powder Coating Process
Explore dry finishing, critical part hanging requirements, and why powder coating severely outperforms wet paint and anodizing in volume manufacturing durability.
Durability Hanging Finishing
3D Printing Guide
3D Printing
3D Printing Design Guide
Wall thickness minimums, overhang rules, thread insert heat-set best practices, supported vs. unsupported geometry, and material selection guide for FDM and SLA parts.
FDM SLA Nylon PA12
File Preparation Guide
Laser Cutting
How to Prepare Your CAD File
A step-by-step walkthrough for preparing DXF and STEP files from AutoCAD, Fusion 360, and SolidWorks — ready to submit with zero back-and-forth.
DXF STEP Layers
TRUMPF TruBend CNC press brake with its controls and tooling bed
Finishing
Anodizing Guide: Type II vs. Type III
When to specify Type II vs. Type III hardcoat anodize, how anodizing affects dimensional tolerance, color options, masking considerations, and how to call it out on your drawing.
Type II Hardcoat Color
Mild Steel for Laser Cutting Grades and Design Guide
Materials
Mild Steel for Laser Cutting
Compare A1008 cold rolled, A1011 hot rolled and HRPO, A36 plate, and coated sheet—then choose the right cut edge, fabrication route, finish, and ordering callout.
A1008 A1011 A36
Understanding Cold-Rolled Steel Sheet Metal Guide
Materials
Understanding Cold-Rolled Steel Sheet Metal
What cold rolling changes, how ASTM A1008 designations work, and how to specify thickness, laser cut, bend, weld, coat, and protect carbon steel sheet for U.S. production.
A1008 CS Type B CRS
Stainless Steel Sheet Metal 304 316 and More Guide
Materials
Stainless Steel Sheet Metal: 304, 316 & More
A U.S.-focused guide to 201, 301, 304/304L, 316/316L, 321, 409, 430, and 17-4 PH — specifications, finishes, laser cutting, bending, welding, passivation, and drawing callouts.
304L 316L ASTM A240
Titanium Sheet Metal Grade 2 Grade 5 and More Guide
Materials
Titanium Sheet Metal: Grade 2, Grade 5 & More
A U.S.-focused guide to Grades 1, 2, 3, 4, 5, 7, 9, 12, and 23 — ASTM and AMS specifications, laser cutting, bending, welding, finishes, safety, certification, and drawing callouts.
Grade 2 Grade 5 ASTM B265
Copper Sheet Metal U.S. Alloy and Fabrication Guide
Materials
Copper Sheet Metal: U.S. Alloy & Fabrication Guide
How to select and specify C11000, C10100, C10200, and C12200 copper sheet in the U.S. — ASTM product standards, tempers, exact thicknesses, laser cutting, bending, joining, finishes, and drawing callouts.
C11000 ASTM B152 Sheet Metal
Enclosed TRUMPF fiber laser cutting machine
Materials
Sheet Metal Material Selection Guide
Choosing between 5052-H32, 6061-T6, A36 HR steel, 304 stainless, and brass for your project — a practical comparison of machinability, corrosion resistance, strength, and cost.
5052-H32 6061-T6 304 SS
CNC milling spindle and cutting tool
Laser Cutting
Understanding Tolerances & Inspection
A practical guide to laser cutting tolerance stacks, how we inspect parts, what ±0.005″ really means in production, and when to call out tighter tolerances on your drawing.
±0.005″ Inspection
GD&T Guide
CNC Machining
The Engineer's Guide to GD&T
Decoding Geometric Dimensioning and Tolerancing: A complete breakdown of symbols, feature control frames, and how they apply in precision manufacturing.
GD&T Tolerances Symbols
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
Picking Tooling for the Bend
How to choose the right punch and V-die from material, thickness, and target radius — air bending fundamentals, the V × T rule, the 16% radius rule, tonnage math, and Trumpf / WILA tooling reference.
Air Bending V-Die Selection Tonnage
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
Our Press Brake Tooling Library
Every punch and V-die we run, the material thickness each die covers under the 6–12 die-width rule, and full technical data for each WILA OW / EV tool — with a thickness coverage map and per-tool spec cards.
Tooling Inventory 6–12 Rule Thickness Coverage
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
The Bend Affected Zone (BAZ)
How deformation around the bend radius impacts hole placement, slot positioning, and feature design in sheet metal — with minimum clearance formulas and material-specific rules.
BAZ Hole Placement Design Rules
Bending Ontology Guide
Bending
Bending Ontology & Material Specs
The complete bending vocabulary — bend deduction, bend allowance, K-factor, inside radius, neutral axis, and minimum formed flange — plus a live lookup tool for tooling, K-factor, and bend deduction on every material we run.
Bend Deduction K-Factor Calculator
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
Reverse Bend Clearance Checker
Interactive tool: enter your base dimension and return flange height to see whether our punches can reach the bend. Envelopes computed live from the real traced tool profiles.
Interactive Clearance Tooling
TRUMPF TruBend CNC press brake with its controls and tooling bed
Bending
Part-on-Part Collision
The interference that only exists mid-stroke. Why springback forces the brake to over-bend past your angle, how far that actually moves a flange, and how much clearance a formed feature needs to survive it — plus two interactive 3D parts you can run through the same press brake stroke, one that collides and one that clears.
Collision Springback Interactive 3D

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A better design.
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