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Home / Engineering tools

Free calculators for production engineers.

Quick first answers for hole making, threading, bending and busbar. Every tool shows its assumptions and labels results as estimates.

Compressed air tools

A cost map of your compressor room, leak test, variable speed savings, pipe, dryer and receiver sizing, heat recovery and nitrogen.

Open the air tools

Thread finder for thin sheet and tube

Pick a thread and wall thickness. See whether thermal drilling fits, which drill and form tap to use, and how many threads you gain.

-Thermal drill diameter
-Approximate bushing length
-Full threads, against - in plain sheet

Typical guide only. Bushing length depends on material, drill type (short, long or flat) and speed. Send a sample part and we will confirm the thread strength on it.

Press brake tonnage and bend allowance

Air bending with a V die. Gives tonnage, inside radius and flat length for a two flange part.

Material
-Tonnage for this bend
-Natural inside radius
-Flat blank length
Tonnage per metre
Bend allowance
Bend deduction
K factor used

Planning estimate using the standard air bending formula, tonnes = 1.42 × tensile strength × thickness² × length ÷ V ÷ 9.81, with typical tensile strengths. Check against your press and tooling load limits. Hemming and bottoming need several times more force.

Marking, springback or slow setups on doors and panels? We specify segmented and non marking tooling.

Press brake tooling

Knockout and cable entry chart

Conduit trade size to finished hole size and the punch to use.

-Finished hole diameter
-Punch and die set
-Suggested driver
Trade sizeHole, inHole, mmPilot

Hole sizes follow the common conduit knockout standard used by North American punch makers. Confirm the fitting manufacturer's required hole size for special connectors.

Punching many entries a day? Ask about hydraulic punch drivers and step drills sized to your cabinets.

Enclosure hole making

Busbar planning estimator

A starting bar size, hole pattern and the punch sizes to stock. For planning tooling, not for final design.

Conductor
-Starting bar size per conductor
-Cross section per phase
-Joint bolts and hole size

Planning estimate using about 1.55 A/mm² for copper and 1.05 A/mm² for aluminum, enclosed and painted, with a parallel bar derating. Final sizing must be confirmed by the design engineer against temperature rise testing and the applicable CSA C22.2 and UL 891 or IEC 61439 requirements.

Punching, cutting and bending busbar in house? We size the punch and die sets to your bar range.

Busbar processing

Want us to confirm it on your part?

Send the part and the numbers from the tool. We will check them against your process.

No mailing lists. We use your details only to answer this request. Please do not include passwords or card numbers. Payment safety.