Working notes on EDC parts manufacturing
What we learn from quoting and routing EDC jobs, grouped by topic rather than by date: material choices, finishes that hold up, drawing decisions that change a price, and how to get a quote a shop can actually stand behind.
What each metal or polymer costs to machine, how it finishes, and where it fails: titanium, aluminium, stainless, brass and hardened tool steel.
Zirconium for EDC: machining, black oxide and what it costs
Zirconium sits between titanium and steel in weight, machines like a gummy titanium and takes a black oxide skin. What to expect in cost, chip safety and finish.
Tungsten carbide glass breakers and tips: grades and fixing methods
Tungsten carbide is hard and brittle, so the grade and the way the tip is held matter more than the shape. Grades, tip geometry and press-fit, braze or bond fixing.
Timascus and Mokuti: sourcing layered titanium for EDC builds
Layered titanium gives each handle a one-off pattern. How blanks are bought and machined, why pattern depth moves with thickness and what to ask a maker before ordering.
Knife pivot washers: phosphor bronze, PTFE and PEEK compared
Pivot washers set how a folder opens, yet cost cents each. Phosphor bronze, PTFE and PEEK differ in feel, wear and tolerance needs. What to specify and what to test.
Grade 9 titanium tubing for pens and lights: when it beats bar
Boring a pen barrel from solid titanium bar turns most of the metal into chips. Grade 9 tube starts hollow. Where tube wins, where bar still does and what to check.
Folding knife blade steels: 14C28N, S35VN, M390 and MagnaCut
Four steels cover most folding knife blade orders. What each is, typical hardness, how they behave in grinding and heat treatment and what that does to cost.
17-4 PH stainless for clips and hardware: H900 vs H1150
17-4 PH stainless is machined soft and aged hard. H900 is strong and brittle, H1150 is tougher and softer. What the condition changes for clips, pins and bolts.
Stainless for EDC: 304, 316L, 416 and 440C compared
Four stainless grades cover almost all EDC hardware. Which machines fast, which hardens, which actually resists corrosion, and where each belongs in a knife or a light.
Aluminium 6061 vs 7075 for EDC parts
7075 is roughly twice the price and stiffer; 6061 machines cleaner and anodizes blacker. Where each belongs in flashlight bodies, scales and pocket clips.
Titanium Grade 2 vs Grade 5 for EDC parts
Grade 2 anodizes into deeper colour, Grade 5 holds threads. Which titanium to specify for knife scales, pen bodies and flashlight parts — and what each costs to machine.
Knife scale materials compared: titanium, aluminium, G10, micarta, carbon fibre
What each knife scale material costs to machine, how it finishes, and where it fails. A sourcing-side comparison for brands deciding what to put in the drawing.
Heat treatment for EDC parts: D2, SKD11, H13 and what it adds to your schedule
Hardened parts are machined soft, hardened, then ground to size. What that sequence means for tolerance, lead time and cost on pivots, lock inserts and wear parts.
Brass, bronze and copper in EDC: patina, machinability and tarnish control
C360 brass machines faster than anything else in EDC. What separates brass from bronze and copper, how patina actually develops, and how to ship parts that are not already tarnished.
Stonewash, bead-blast, anodizing and marking: what each process actually does to the surface, and which combinations cause problems.
Tumbling, deburring and edge breaks on small EDC parts
Burrs and sharp edges separate a pocket tool that feels finished from one that does not. How tumbling, brushing and hand deburring work and how to specify edges.
PVD and DLC coatings on EDC parts: colour, wear and lead time
PVD and DLC coat blades, clips and titanium bodies in a few microns. What each coating looks like, how it wears, the heat risk for blades and the lead time.
EDC finishes that survive a pocket: stonewash, bead-blast, anodize
A machined part with a sloppy finish looks worse than an average part finished well. What stonewash, bead-blast, Type III and PVD each do, and which to specify for EDC.
Titanium anodizing colours: the voltage relationship and why batches drift
Titanium colour comes from oxide thickness set by voltage, not dye. The approximate voltage-to-colour map, why red is impossible, and what makes a batch come out uneven.
Type II vs Type III anodizing for aluminium EDC parts
Type II gives colour, Type III gives wear resistance and changes your dimensions. Which to specify for flashlight bodies, scales and clips, and what each does to cost and fit.
Passivation, and why your stainless EDC parts are rusting
Stainless rusts when machining leaves free iron on the surface. What passivation does, when to demand it, and why bead-blasted 416 is the worst combination in EDC.
Laser marking vs engraving vs etching for EDC logos and serial numbers
Three processes people use interchangeably and should not. What each does to the surface, which survives anodizing, and how to mark a batch of EDC parts properly.
The drawing decisions that decide fit, function and cost before a part ever reaches a shop: tolerances, threads, springs and inspection.
Spinning tops and desk toys: balance, tips and runout
CNC spinning top manufacturing: how mass, tip contact and runout set spin time, a balance calculation you can apply, and what to put in the RFQ for a metal top.
Titanium lighter sleeves and peanut lighters: fits and seals
Titanium lighter case machining: size the sleeve fit, pick an O-ring that survives lighter fluid, set squeeze and surface finish, and write a quotable RFQ.
Titanium card wallets and money clips: plates and screws
Titanium wallet manufacturer guide: size plates to the ISO card stack, check clip spring travel against Grade 5 yield, choose screws and finish, and write the RFQ.
Integral knife handles: machining from one block
An integral knife is cut from one billet, so most of the stock becomes chips. What that does to cost, scrap risk, heat treat and tolerances, and how to spec it.
Frame lock lockbars: steel inserts, spring and heat treat
A titanium frame lock bar is a spring and a wear face at once. When a steel insert helps, which grade and hardness to specify, and how to avoid overtravel.
Titanium pry bars: profile, chamfer and finish on a first run
A pocket pry bar is a flat titanium blank with a thin tip. Why Grade 5 is the usual choice, how thickness sets strength and how to run a first batch of ten.
Thread milling vs tapping small titanium threads
A snapped tap in a finished titanium handle scraps the part. Thread milling is slower per hole but safer. When each method fits M2 to M5 threads in EDC parts.
Swiss-type turning for EDC pens, bits and small pins
Swiss-type lathes hold slender parts steady by cutting next to the guide bushing. Which EDC parts suit them, what the bar stock needs and where they do not pay.
4-axis vs 3-axis milling for titanium knife handles
A flat handle slab is a 3-axis job. Rounded edges, contoured backs and tight batches push it toward 4-axis. What changes in setups, cycle time and cost.
Flashlight bodies: heat sinking, wall thickness and O-ring grooves
A flashlight body is a heat path and a seal. How material, wall thickness and fins set LED temperature, and how to specify O-ring grooves and threads that seal.
Fidget sliders and spinners: weight, bearings and tolerance stack
Metal fidget sliders and spinners succeed or fail on a few hundredths of a millimetre. Bearing seats, track clearance, balance and weight, with typical tolerances.
Knurling, jimping and grip textures: how each is machined
Formed knurl, cut knurl, milled jimping and flute patterns each have a different cost and edge quality. How the shops make them and what to put in the RFQ.
Folding knife hardware: pivots, standoffs, backspacers and screws
A folding knife holds together with a dozen small turned parts. What each one does, which dimensions set the blade gap and when custom screws are worth ordering.
Bolt-action pens: cam paths, refill fit and clip mounting
A bolt-action pen has a slot, a cam and a refill that must clear them all. Where the tolerances sit, how to avoid galling and what to test on the first prototypes.
Flashlight threads that do not gall: material pairing and anodize allowance
Aluminium on aluminium galls, hard anodize changes the fit, and threads cut in separate setups bind. What to specify so heads and tail caps thread smoothly every time.
First-article inspection and CMM reports on a small EDC batch
What inspection to ask for on 50 pieces, what a first article report should contain, and where asking for full dimensional data on every part stops being worth the money.
Titanium pen machining: barrels, threads, tips and knurling
A machined pen is mostly turning, and its failure modes are threads and concentricity. What to specify for titanium and brass pen bodies at EDC batch sizes.
Pocket clips: spring temper, geometry and why they take a set
A pocket clip is a spring, and most clip failures are a material or temper problem rather than a geometry one. What to specify for machined and formed EDC clips.
Design for CNC: seven changes that cut an EDC quote
Seven specific, low-risk design changes that reduce machining cost on EDC parts without changing how the product looks or feels in the hand.
Tolerances and fits for knife scales: what to call out, what to leave general
A tight tolerance on the wrong dimension is the most expensive habit in EDC drawings. Which features control fit on a scale, and what tolerance each actually needs.
Lanyard beads and small turned parts: the cheapest way into a drop
Beads, worry stones and bottle openers are the lowest-risk first product in EDC. Why they are cheap to make, what still goes wrong, and how to use them to test a supplier.
How to write an RFQ, read a quote and protect a design when the manufacturing happens on the other side of the world.
Shipping knife blades across borders: customs and carriers
How to ship knife blades internationally: US switchblade rules, UK banned knives, postal and courier limits, HTS lines and the paperwork that avoids a seizure.
US tariffs on Vietnam-made EDC parts in 2026
What a US buyer pays on CNC EDC parts made in Vietnam as of October 2026: the 12.5% Section 301 duty, how it stacks, metals exceptions, origin rules and what is pending.
Titanium knife scale cost per piece: what sets the price
A titanium knife scale is priced on setup, machine time and finishing far more than on metal. How the cost per piece builds up, and what to ask for in a quote.
Landed cost of CNC EDC parts: price, freight and duty
The piece price is not what the parts cost you. How to build landed cost for CNC EDC parts: Incoterms, customs value, duty by HTS line, fees and the 2026 additions.
Kickstarter EDC launch: from prototype to shipped batch
What Kickstarter requires of a hardware EDC project, what to lock before you launch, and how a realistic prototype-to-delivery schedule and budget are built.
Keychain tools and one-piece multi-tools: blanking vs CNC at 500 pcs
A flat keychain tool can be stamped, laser cut or milled. At 500 pieces the cheapest route is rarely the one with a tooling bill. Break-even maths and tolerances.
Cosmetic inspection for EDC parts: defining A, B and C surfaces
Dimensions pass and the part still gets rejected for a scratch. A simple A, B and C surface scheme, limit samples and sampling levels make cosmetic grades enforceable.
Quoting EDC jobs: what buyers actually compare
Two shops quote the same part 20 percent apart and the buyer picks the higher one. What overseas EDC buyers read in a quotation besides the total, and how to write one that wins.
Why small-batch EDC work is worth quoting properly
A 50-piece order looks like a distraction next to a 5,000-piece one. The arithmetic and the customer behaviour say otherwise. For shops deciding whether this niche is worth the setup time.
What an export-ready capability sheet actually contains
Most Vietnamese shops send a machine list and a price. Buyers abroad are reading for something else. What to put in a capability sheet so an overseas enquiry converts.
NDA, IP and tooling ownership when you outsource EDC manufacturing
What an NDA actually protects, who owns the fixtures and programs your order paid for, and the three clauses worth having before your design leaves your inbox.
Why 25 pieces costs more than a quarter of 100
Small-batch CNC pricing is dominated by setup, not cutting. What actually drives the per-piece price on an EDC run, and the four changes that move it most.
STEP, IGES, DWG, DXF: which CAD file to send for a CNC quote
Each CAD format carries different information, and the wrong one adds days to a quote. What STEP, IGES, DWG, DXF and PDF actually contain, and what to send for EDC parts.
How to write a CNC RFQ a shop can actually quote
Most RFQs get a slow, padded quote because they leave the shop guessing. The eight lines that turn a vague enquiry into a real number, from the sourcing side of the desk.
Sourcing EDC parts from Vietnam vs China: what actually differs
Machine capability is comparable. Where the two genuinely differ is minimum order appetite, material availability, tooling depth, communication and tariff exposure.
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