# Threading and Tapping Job Cost Estimate Worksheet > Source: https://netray.co/tools/threading-and-tapping-job-cost-estimate-worksheet > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Free Tools ## Short answer List threads on a part with cycle times, tool costs and machine rate to see the cost per part and per lot for threading and tapping. ## Category cost-finance ## Industry Machining ## Audience - Estimator - Manufacturing engineer - Shop owner ## Tool **Kind:** worksheet **Mode:** editable **Currency:** $ **Columns:** #### Thread **Key:** thread **Type:** text #### Method **Key:** method **Type:** select **Options:** - Single point turning - Cut tap - Form tap - Thread mill - Die head #### Threads per part **Key:** count **Type:** number #### Seconds per thread **Key:** secs **Type:** number **Unit:** sec #### Machine rate **Key:** rate **Type:** number **Unit:** $/hr **Format:** currency #### Tool cost **Key:** tool_cost **Type:** number **Format:** currency #### Threads per tool **Key:** tool_life **Type:** number #### Lot size **Key:** lot **Type:** number #### Machine cost per part **Key:** machine_pp **Type:** number **Expr:** count * secs / 3600 * rate **Format:** currency #### Tool cost per part **Key:** tool_pp **Type:** number **Expr:** if(gt(tool_life,0), count * tool_cost / tool_life, 0) **Format:** currency #### Total per part **Key:** total_pp **Type:** number **Expr:** machine_pp + tool_pp **Format:** currency #### Cost per lot **Key:** lot_cost **Type:** number **Expr:** total_pp * lot **Format:** currency **Rows:** **Thread:** 1/2-13 UNC external **Method:** Single point turning **Count:** 1 **Secs:** 22 **Rate:** 75 **Tool cost:** 8.5 **Tool life:** 400 **Lot:** 500 **Thread:** M8x1.25 internal **Method:** Form tap **Count:** 4 **Secs:** 6 **Rate:** 85 **Tool cost:** 38 **Tool life:** 3500 **Lot:** 500 **Thread:** 1/4-20 UNC internal **Method:** Cut tap **Count:** 6 **Secs:** 5 **Rate:** 85 **Tool cost:** 14 **Tool life:** 1200 **Lot:** 500 **Thread:** 3/4-16 UNF internal **Method:** Thread mill **Count:** 2 **Secs:** 28 **Rate:** 85 **Tool cost:** 95 **Tool life:** 4000 **Lot:** 500 **Totals:** #### Total threading cost per part **Key:** total_pp **Agg:** sum **Format:** currency #### Total cost for lot **Key:** lot_cost **Agg:** sum **Format:** currency **Summary:** #### Cost per thread operation (average) **Key:** time_note **Expr:** avg_total_pp **Format:** currency **Notes:** Tool life values are placeholders and depend heavily on material and lubrication. Replace with your own tool log data. Setup time, inspection and broken tap recovery are not included; add rows or markup for them. ## Content **Intro:** Threading looks cheap until a broken tap or a long thread mill cycle shows up in the actuals. This worksheet separates machine time cost from tooling cost per part so estimates stand up against reality. **Sections:** #### How to use the estimate **Body:** Add one row per thread feature. Pick the method, enter how many threads the part has, the seconds per thread, machine rate per hour, tool price and expected threads per tool. The sheet gives machine cost, tool cost and total per part, then multiplies by lot size. Export the result to Excel and add setup, inspection and handling elsewhere in your quote. #### Method trade-offs **Body:** Cut taps are common and inexpensive but can break in blind holes. Form taps produce stronger threads with no chips in suitable ductile materials but need correct hole size and lubrication. Thread milling costs more per tool and runs longer per hole, but the cutter does not seize, can run different diameters, and a break is usually recoverable. Single point threading on a lathe suits external threads and larger diameters. #### Reading the output **Body:** Machine cost usually dominates for slow operations, such as thread milling, and tool cost dominates for expensive taps in tough alloys with short life. If tool cost per part rises sharply, check the tool life input first; a small change in assumed life swings the result. Compare methods on the same part by duplicating a row with a different method and judging total per part, not just cycle time. #### Common mistakes **Body:** Do not assume catalog tool life applies to your material and coolant. Do not omit chip clearing on deep blind holes, which adds time. Avoid forgetting the cost of a broken tap, which can scrap a finished part; include a risk allowance when quoting hard materials. Also keep machine rate consistent with your burdened hourly rate, not just the labor rate. **Cta:** If your costing and routings live in an ERP, Netray can help bring actual tool and machine data back into estimates. **Faq:** #### How long does it take to tap a hole? **Answer:** It depends on size, depth, material and whether the machine uses rigid tapping. Small holes can take a few seconds including approach and retract; large or deep holes take longer. Use your machine's actual cycle time from a test run for quotes. #### Is thread milling more expensive than tapping? **Answer:** Per tool, yes, and the cycle is usually longer. However, a thread mill can last for thousands of holes, cuts different diameters with one tool and avoids tap breakage in costly parts. Compare total cost per part using your own numbers. #### What machine rate should I use? **Answer:** Use a burdened rate that includes depreciation, power, maintenance, floor space and operator cost where applicable. Rates vary widely by machine type and region, so take it from your own cost accounting. #### Does the sheet include setup time? **Answer:** No. Setup is a per-lot cost, not per part. Add a separate row for setup with count 1 and the setup time converted to seconds, or handle setup in your overall quote template. ## Search terms threading cost estimate, tapping cost per part, machining quote worksheet excel, thread operation time estimate, cnc threading cycle time cost, job costing machining worksheet, tap cost per hole --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json