Double Vision USA - Field Notes https://doublevision.company/blog/ Guides for small shops, contractors, and operators. en-us Fri, 26 Jun 2026 11:25:03 GMT <![CDATA[CNC speeds and feeds calculator (SFM, RPM, IPM): formulas + ShopCalc]]> https://doublevision.company/blog/speeds-feeds-guide/ https://doublevision.company/blog/speeds-feeds-guide/ Wed, 28 Jan 2026 00:00:00 GMT Manufacturing <![CDATA[Tap drill chart and how to read thread sizes (UNC, UNF, M-series)]]> https://doublevision.company/blog/tap-drill-chart/ https://doublevision.company/blog/tap-drill-chart/ Sun, 12 Apr 2026 00:00:00 GMT Manufacturing <![CDATA[NEC wire sizing for branch circuits (ampacity + voltage drop)]]> https://doublevision.company/blog/nec-wire-sizing-guide/ https://doublevision.company/blog/nec-wire-sizing-guide/ Wed, 15 Apr 2026 00:00:00 GMT Electrical <![CDATA[MIG welding amperage and wire feed cheat sheet (carbon steel)]]> https://doublevision.company/blog/mig-amperage-cheat-sheet/ https://doublevision.company/blog/mig-amperage-cheat-sheet/ Sun, 19 Apr 2026 00:00:00 GMT Welding <![CDATA[How much concrete do I need? Slab, footing, and pier yardage]]> https://doublevision.company/blog/concrete-yardage-guide/ https://doublevision.company/blog/concrete-yardage-guide/ Wed, 22 Apr 2026 00:00:00 GMT Construction <![CDATA[Deck joist span and spacing (16" vs 12" oc, plus the Simpson SDWS that replaced 3/8" lag bolts)]]> https://doublevision.company/blog/deck-joist-span-and-spacing/ https://doublevision.company/blog/deck-joist-span-and-spacing/ Sat, 25 Apr 2026 00:00:00 GMT Construction <![CDATA[How much drywall do I need? Sheets, screws, mud, and the paper-vs-mesh rule pros never break]]> https://doublevision.company/blog/drywall-sheets-and-mud-calculator/ https://doublevision.company/blog/drywall-sheets-and-mud-calculator/ Sun, 26 Apr 2026 00:00:00 GMT Construction <![CDATA[How much paint do I need? The math, the brand picks pros buy, and the Floetrol trick]]> https://doublevision.company/blog/how-much-paint-do-i-need/ https://doublevision.company/blog/how-much-paint-do-i-need/ Mon, 27 Apr 2026 00:00:00 GMT Construction <![CDATA[Schluter Ditra vs cement backer board for tile floors - when each one wins]]> https://doublevision.company/blog/schluter-ditra-vs-cement-board/ https://doublevision.company/blog/schluter-ditra-vs-cement-board/ Mon, 27 Apr 2026 00:00:00 GMT Construction <![CDATA[Drywall anchors and the 25-pound rule (plastic, toggle, SnapToggle, or just hit a stud)]]> https://doublevision.company/blog/drywall-anchors-25-pound-rule/ https://doublevision.company/blog/drywall-anchors-25-pound-rule/ Tue, 28 Apr 2026 00:00:00 GMT Construction <![CDATA[What speeds and feeds for a 1/4" 4-flute carbide endmill in 4140 steel?]]> https://doublevision.company/blog/speeds-feeds-1-4-carbide-4140/ https://doublevision.company/blog/speeds-feeds-1-4-carbide-4140/ Sat, 02 May 2026 00:00:00 GMT Manufacturing <![CDATA[Tap drill for 1/2-13 UNC at 75% thread engagement (with the math)]]> https://doublevision.company/blog/tap-drill-1-2-13-unc-75-percent/ https://doublevision.company/blog/tap-drill-1-2-13-unc-75-percent/ Sat, 02 May 2026 00:00:00 GMT Manufacturing <![CDATA[How to write G-code to face a 2.5" Ø part on a CNC lathe]]> https://doublevision.company/blog/gcode-facing-2-5-inch-part/ https://doublevision.company/blog/gcode-facing-2-5-inch-part/ Sat, 02 May 2026 00:00:00 GMT Manufacturing <![CDATA[How many tiles for a 12 × 14 ft bathroom?]]> https://doublevision.company/blog/how-many-tiles-12x14-bathroom/ https://doublevision.company/blog/how-many-tiles-12x14-bathroom/ Sat, 02 May 2026 00:00:00 GMT Construction <![CDATA[How many bags of concrete for a 4-inch slab 20 × 15 ft?]]> https://doublevision.company/blog/concrete-bags-4-inch-slab-20x15/ https://doublevision.company/blog/concrete-bags-4-inch-slab-20x15/ Sat, 02 May 2026 00:00:00 GMT Construction <![CDATA[How many sheets of drywall for a 12 × 14 ft room with a 9-foot ceiling?]]> https://doublevision.company/blog/drywall-sheets-12x14-room-9-foot-ceiling/ https://doublevision.company/blog/drywall-sheets-12x14-room-9-foot-ceiling/ Sat, 02 May 2026 00:00:00 GMT Construction <![CDATA[What amperage for 1/4" mild steel MIG with .035 ER70S-6?]]> https://doublevision.company/blog/mig-amperage-1-4-mild-steel-035/ https://doublevision.company/blog/mig-amperage-1-4-mild-steel-035/ Sat, 02 May 2026 00:00:00 GMT Welding <![CDATA[Heat input limit for SA-516 Gr 70 root pass]]> https://doublevision.company/blog/heat-input-sa-516-gr-70-root-pass/ https://doublevision.company/blog/heat-input-sa-516-gr-70-root-pass/ Sat, 02 May 2026 00:00:00 GMT Welding <![CDATA[TIG tungsten size for 180 A on stainless steel]]> https://doublevision.company/blog/tig-tungsten-size-180a-stainless/ https://doublevision.company/blog/tig-tungsten-size-180a-stainless/ Sat, 02 May 2026 00:00:00 GMT Welding <![CDATA[What wire size for 40 A continuous, 180 ft, 240 V single-phase?]]> https://doublevision.company/blog/wire-size-40a-180-feet-240v/ https://doublevision.company/blog/wire-size-40a-180-feet-240v/ Sat, 02 May 2026 00:00:00 GMT Electrical <![CDATA[Conduit fill for 4× #10 AWG + 1× #6 in 3/4" EMT]]> https://doublevision.company/blog/conduit-fill-10-and-6-awg-thhn-3-4-emt/ https://doublevision.company/blog/conduit-fill-10-and-6-awg-thhn-3-4-emt/ Sat, 02 May 2026 00:00:00 GMT Electrical <![CDATA[Voltage drop and NEC 210.19(A) explained]]> https://doublevision.company/blog/voltage-drop-nec-210-19-explained/ https://doublevision.company/blog/voltage-drop-nec-210-19-explained/ Sat, 02 May 2026 00:00:00 GMT Electrical <![CDATA[Write and send a professional quote (fast)]]> https://doublevision.company/blog/how-to-send-a-professional-quote/ https://doublevision.company/blog/how-to-send-a-professional-quote/ Mon, 09 Feb 2026 00:00:00 GMT Operations <![CDATA[Bill of sale guide (template included)]]> https://doublevision.company/blog/bill-of-sale-guide/ https://doublevision.company/blog/bill-of-sale-guide/ Mon, 09 Feb 2026 00:00:00 GMT Operations <![CDATA[Facebook Marketplace bill of sale (free) + safest way to get paid]]> https://doublevision.company/blog/sell-safely-on-facebook-marketplace/ https://doublevision.company/blog/sell-safely-on-facebook-marketplace/ Mon, 09 Feb 2026 00:00:00 GMT Operations