The Machinist Calc Pro 2 Advanced Machining Math + ® Materials calculator (Model 4088) provides hundreds of fast, precise machining-specific solutions for turning, drilling, boring and face, end and slot milling. Built-in tables for 20 materials, 6 processes and 3 tools will let you spend much less time looking up your most-needed calculations on charts, in books or on the Internet and more time machining.
Page 3
UsinG the Machinist calc pro 2 .........15 U.S./METRIC MODES ............15 MATERIALS, PROCESSES AND TOOLS ......15 Materials ................15 Processes ................16 Tools ...................17 RPM (SPINDLE SPEED) ............17 RPM – Basic ...............17 RPM – Face Milling ............18 RPM – End Milling ..............19 FEED RATE – IPM ..............20 Feed Rate –...
basic function Keys On/Clear Key — Turns on power. Pressing once clears the last entry and the display. Pressing twice clears all non-permanent values. gO Off — Turns all power off. Clears all non- permanent values. Arithmetic operation keys Keys used for entering numbers. and .
Page 6
Centimeters (cm) — Identifies entry as centimeters, with repeated presses toggling between linear, area and volume units. Meters (m) — Identifies entry as meters, with repeated presses toggling between linear, area and volume units. Feet — Identifies entry as Feet, with repeated presses of g7 toggling between linear, area and volume units.
Weight and Volume function Keys Tons — Enters or converts a weight or volume value to tons. Pounds (lbs) — Enters or converts a weight or volume value to pounds. Metric tons (met tons) — Enters or converts a weight or volume value to metric tons. Grams —...
ArcTangent (ArcTan) — Calculates the angle for the entered or calculated Tangent value. Miscellaneous functions Degrees:Minutes:Seconds (dms◄►deg) — Converts between D:M:S and decimal degree formats; repeated presses will toggle between the two formats. Percentage — Used to find a given percent of a number.
Page 9
Diameter — Enters a Diameter. Calculates circle Area and Circumference given entered Diameter. Bolt Pattern — Enters the number of holes in a Bolt Pattern. Calculates the hole Center-to-Center Spacing and the x and y coordinates for each hole in a Bolt Pattern given entered Diameter, Number of Bolt Holes, Starting Angle (optional) and Center x and y coordinates.
Page 10
Length of Cut (LOC) — Enters a Cut Length to calculate Cut Time. Surface Feet per Minute — Enters or calculates Cutting Speed. Unitless entries are assumed to be Feet in U.S. mode, meters in Metric mode. Calculates Cutting Speed given entered Diameter and RPM.
Page 11
Inches per Revolution (IPR) — Enters or calculates Cutting Feed or Feed per Revolution (IPR). Provides tabular Feed per Revolution based on Process, Material, Tooling and Depth of Cut. Inches per Minute — Enters or calculates Feed Rate or Feed per Minute (IPM). When applicable, also provides Material Removal Rate and Cut Time.
Page 12
Thread Classification (Thread Class) — Used to select the Thread Class for numeric and fractional Threads and the Tolerance Class for metric Threads. The default Class for numeric and fractional Thread Sizes is 2B (Internal) and the default Tolerance Class for metric Thread Sizes is 6H (Internal).
Angle (θ) — Enters or calculates an Angle, providing the Adjacent Angle for both instances. Calculates an Angle given two other right-triangle values. Also enters Lead Angle adjustment for Face Milling, as well as Starting Angle of the first hole of a Bolt Pattern, with 0° being the three oʼclock position and the rotation going counterclockwise.
Page 14
(cont'd) 255M 255. & 745gM (M-) 745. & total ValUe - 135. & aVeraGe ValUe - 45. & total entries & - 135. Using Memory storage Keys (M1- M9) In addition to the standard cumulative Memory (as previously described), your calculator has nine independent Storage Registers –...
MeMorY 175gr1 M-Ø1 175. MeMorY M-Ø1 175. MeMorY 0gr1 M-Ø1 UsinG the MACHINIST CALC PRO 2 U.S. aND mETrIC mODE SETTINGS The Machinist Calc Pro 2 allows you to set the calculator to use either U.S. Mode or Metric Mode. The default setting is U.S.
1. Face Milling (Default) 4. Turning 2. End Milling 5. Boring 3. Slot Milling 6. Drilling tools The Machinist Calc Pro 2 has three built-in Tool Types that can be used to determine tabular Feed and Speed values. You can scroll through the available Tool Types by repeatedly pressing the L key, or by pressing the + key or - key to scroll forward and backward through the Tools.
(cont'd) .375d DiaMeter 0.375 inch 2. Enter the Cut speed: cUt speeD 300S /Min 300. feet 3. Calculate the spindle speed (RPM): 3056. rpM – Face Milling Find the Spindle Speed when milling 1060 Hi-Carbon Steel (3) with a 0.5" High Performance bit (3) at a Depth of Cut of 0.25": 1.
DiaMeter 0.5 inch 7. Calculate RPM: 4584. 8. show tabular Cut speed: cUt speeD /Min 600. feet 9. Now, change the Depth of Cut to 0.1" and find new RPM and tabular Cut speed: Depth of cUt .1gN (DOC) 0.1 inch 6875.
4. set Material to 316 stainless steel (selection #8): 316-aUs. s. steel Matl 5. Enter Width of Cut: WiDth of cUt .5gP (WOC) 0.5 inch 6. Enter Tool Diameter: DiaMeter 1. inch 7. Calculate RPM: R rpM 802. 8. show tabular Cut speed: cUt speeD /Min 210.
feed rate – Based on Cutting Feed and RPM (for Turning) Calculate the Feed Rate if you are turning a 1" steel round stock down using a Cutting Feed of 0.031 Inches per Revolution and a rotational speed of 900 RPM: 1.
(cont'd) feeD/MinUte 3.200 inch feed rate – Based on Feed per Tooth, RPM and # of Teeth Calculate the Feed Rate for a four-fluted end mill using a Feed per Tooth (Chip Load) of 0.005" turning at 1,000 RPM: RPM: 1000 Feed per Tooth: Number 0.005″...
feed rate – End Milling For End Milling (2), find the Feed Rate (IPM) using 1020 Low-Carbon Steel (1) and a 4-Tooth High Speed Steel Tool (1) with a Diameter of 0.5", a 0.25" Width of Cut and a 20" Length of Cut.
Page 24
(cont'd) 7. Enter the Diameter: DiaMeter 0.5 inch 8. Calculate the Feed Rate: feeD/MinUte 3.667 inch 9. Calculate the Cut Time: cUt tiMe 5.454 10. Calculate the RPM: 917. 11. Change the Width of Cut (Radial Chip Thinning Adjustment): WiDth of cUt .15gP (WOC) 0.15 inch 12.
rct. aDJ. factor 1.091 14. Now, add a 0.125" Depth of Cut and find the Material Removal Rate, spindle Power and spindle Torque: Depth of cUt .125gN (DOC) 0.125 inch feeD/MinUte 9.336 inch Material reMoVal /Min 0.175 cU inch spinDle poWer 0.123 spinDle torQUe lbft...
(cont'd) 300R 300. 3. Calculate the Cutting speed: cUt speeD /Min 314. feet cutting speed – End Milling Find the Cutting Speed when End Milling (2) using 1060-High Carbon Steel (3) using a High Performance 0.5" bit (3) and 0.1" radial Width of Cut: 1.
(cont'd) 7. Change the Material to 1060-High Carbon steel and recalculate: 1060-hi c. steel Matl cUt speeD /Min 65. feet 497. FEED pEr TOOTh/ChIp lOaD - IpT Feed per Tooth (IPT), or Chip Load, is the distance that the workpiece feeds into each tooth on a multi-point cutting tool as it rotates.
feed per tooth – Based on Feed Rate, RPM and # of Teeth Calculate Feed per Tooth (IPT) with a Feed Rate (IPM) of 12.8" per Minute, 4 Teeth and a Spindle Speed of 775 RPM: 1. Enter the Feed Rate: feeD/MinUte 12.8I 12.8 inch...
Page 30
(cont'd) hiGh speeD steel tool 3. select the Material: 4140-alloY steel Matl 4. Enter the Number of Teeth: nUMber of teeth 2gI (#Teeth) 5. Enter the Depth of Cut: Depth of cUt .1gN (DOC) 0.1 inch 6. Enter the Diameter: DiaMeter 1.
anGle 45 n (Ө) 45.° feeD/tooth aDJ. 0.024 inch feeD/MinUte 24.508 inch nUMber of teeth 516. rct. aDJ. factor 1.400 leaD anGle aDJ. 1.414 CUTTING FEED – Ipr Cutting Feed is the distance the cutting tool or workpiece advances during one revolution of the spindle, typically measured in Inches per Revolution (IPR).
(cont'd) feeD/tooth .005T 0.005 inch 2. Enter the Number of Teeth: nUMber of teeth 4gI (#Teeth) 3. Calculate the Cutting Feed: feeD/reV. gT (IPR) 0.020 inch cutting feed – Based on Feed Rate and RPM Calculate the Cutting Feed (IPR) using a 15" Feed Rate (IPM) and a Spindle Speed of 800 RPM: 1.
cutting feed – Turning Find the Cutting Feed (IPR) when Turning (4) 1", 1020 Low-Carbon Steel (1) at a 0.1" Depth of Cut using a High Speed Steel (1) bit: all cleareD 1. select the Process: tUrninG 2. select the Material: 1020-lo c.
DrIll SIzES The D key allows the selection of a desired Drill Size, which can be entered as a: ● Numeric value (whole digits 1 through 97) ● Letter between A and z ● Fractional or decimal Inch value (max. of 3-1/2") ●...
letter Drill size entry You can enter letter Drill Sizes by selecting an alphabet character via Alpha Mode (g8) and then storing it using the D key. The desired letter can be selected by scrolling through Alpha Mode until the letter is reached or by specifying the numerical order of the letter within the alphabet prior to entering Alpha Mode.
(cont'd) 5. Enter order of letter G and enter Alpha Mode: alpha character 7g8 (Alpha) 6. Enter as Drill size: "G" Drill siZe 0.261 inch * Repeated presses of D display the next larger Drill sizes. The + and - keys will scroll forward and backward, respectively, through all available Drill sizes.
3. Enter the 1-19/64" hole size and view next larger and next smaller sizes: 1-19/64" Drill 1i19/64D siZe 1.297 inch 33.00mm Drill siZe 1.299 inch 1-9/32" Drill siZe 1.281 inch Millimeter Drill size entry Enter a 5.7 mm hole size and scroll through the available sizes to view the next larger and next smaller sizes: 1.
(cont'd) 1. Enter the Drill size: 1/2" Drill 1/2D siZe 0.500 inch 2. Enter 118° Angle and calculate the Drill Point Cut Depth: Drill point cUt 118gD (Drill Point) Dpth 0.150 inch Drill cUt anGle 118.000° 1/2" Drill siZe 0.500 inch 3.
The following specifies the entry ranges that the calculator allows for the Thread Size and TPI/Pitch values for numeric, fractional and metric Thread Sizes: thread size tpi/pitch Numeric 0, 1, 2, 3, 4, 5, 6, 8, less than 100 10, 12, 14 Fractional 0.06"...
ExTErNal ThrEaD Thread Size Minimum Pitch Diameter Thread Pitch* Maximum Major Diameter Cut Rod Size Minimum Major Diameter Roll Shank Size Maximum Minor Diameter Maximum Pitch Diameter * Thread Pitch is only displayed for Numeric and U.s. Thread sizes. ThrEaD ClaSSIFICaTION With the Machinist Calc Pro 2 you can choose between Internal and External Threads.
changing thread classes To display the current Thread Classification, press gt. Repeated presses of will toggle between External and Internal Thread Types. You can change the number of a Thread Class by entering the number of the desired class/ grade and pressing gt. changing a U.s.
Page 42
(cont'd) 4gt (Thread Class) MM int. threaD 2. scroll through the available Tolerance Positions for the entered Grade: MM ext. threaD MM ext. threaD MM ext. threaD MM ext. threaD MM int. threaD MM int. threaD 3. Enter a Tolerance Grade of 6 and scroll through the available Tolerance Positions for the entered Grade: MM int.
numeric thread size Enter an 8-32 screw and scroll through the available Internal Thread (Class 2B) characteristics, then switch to External Thread (Class 2A) and scroll through the available Thread characteristics: Note: The default U.s. Thread Class is 2B (Internal). To view the current Thread Class, press gt.
Page 44
(cont'd) close fit Drill 0.170 inch free fit Drill 0.177 inch pitch DiaMeter 0.144 inch pitch DiaMeter 0.147 inch Minor DiaMeter 0.130 inch Minor DiaMeter 0.139 inch MaJor DiaMeter 0.164 inch 5. switch to Thread Class 2A: U.s. ext. threaD gtt (Thread Class) 6.
pitch DiaMeter 0.140 inch MaJor DiaMeter 0.163 inch MaJor DiaMeter 0.157 inch Minor DiaMeter 0.126 inch fractional thread size Find the available Internal and External Thread characteristics for a 1/4 Inch, 28 TPI screw: g* all cleareD 1. Verify Thread Class is set to 2B: U.s.
Page 46
(cont'd) close fit Drill 0.257 inch free fit Drill 0.266 inch pitch DiaMeter 0.227 inch pitch DiaMeter 0.231 inch Minor DiaMeter 0.211 inch Minor DiaMeter 0.220 inch MaJor DiaMeter 0.250 inch 5. switch to Thread Class 2A: U.s. ext. threaD gtt (Thread Class) 6.
pitch DiaMeter 0.223 inch MaJor DiaMeter 0.249 inch MaJor DiaMeter 0.243 inch Minor DiaMeter 0.207 inch Metric thread size Find the available Internal and External Thread characteristics for a 5 mm, 0.75 mm Pitch screw with a Tolerance Class of 4H: Note: The default Metric Tolerance Class is 6H (Internal).
Page 48
(cont'd) roll tap Drill 0.182 inch close fit Drill 5.300 MM free fit Drill 5.800 MM pitch DiaMeter 4.513 MM pitch DiaMeter 4.588 MM Minor DiaMeter 4.188 MM Minor DiaMeter 4.306 MM MaJor DiaMeter 5.000 MM 5. switch to External 4g Tolerance Class: MM ext.
pitch DiaMeter 4.435 MM MaJor DiaMeter 4.978 MM MaJor DiaMeter 4.888 MM t Minor DiaMeter 4.166 MM custom thread percentage The Machinist Calc Pro 2 uses a default Thread grip Percentage of 75% when calculating Tap Drill sizes. With the custom Percentage Thread function, you can enter a different value to calculate Tap Drill sizes.
(cont'd) 2. Change the Thread Grip Percentage to 50% and calculate the new Cut Tap and Roll Tap Drill sizes: 50gn (% of Thread) threaD % - Grip threaD siZe 0.25 - 26 inch threaD pitch 0.038 inch tap Drill siZe 0.228 inch roll tap Drill 6.000 MM...
3. Find the Ideal, Maximum and Minimum Wire sizes: iDeal Wire siZe gS (Wire size) 0.036 inch Max Wire siZe 0.056 inch Min Wire siZe 0.035 inch 3-Wire Measurement – Known Thread Size and Wire Size You can find the Minimum and Maximum 3-Wire Measurements as well as the Pitch Diameters if you know the Thread Size and the Wire Size you want to use.
(cont'd) threaD siZe 0.375 - 16 inch 4. Enter the Wire size**: storeD Wire siZe .04gS (Wire size) 0.04 inch 5. Find the Minimum 3-Wire Measurement: 3-Wire MeasUre gR (3W Measure) 0.395 inch 6. Find the Maximum 3-Wire Measurement: 3-Wire MeasUre 0.399 inch 7.
Page 53
1. If necessary, set the Thread Class to 2A: U.s. ext. threaD 2gt* (Thread Class) * If necessary, continue pressing t until the desired External Thread Class is displayed. 2. Enter the Thread size: threaD siZe .375it 0.375 - inch 3.
BOlT paTTErN With the Machinist Calc Pro 2, you can determine a Bolt Pattern by entering the Bolt Circle Diameter, the Number of Bolt Holes and the Angle of the first bolt hole (optional). You can also enter an optional center x and y-coordinate of the Bolt Pattern.
Page 55
3. Enter the start Angle: anGle (Ө) 20.° 4. Enter Bolt Circle Diameter: DiaMeter 3.5d 3.5 inch 5. Enter the Number of Bolts: nUMber of bolts 3gd (Bolt Pattern) 6. Calculate center-to-center spacing and the x and y coordinates: oc spacinG 3.031 inch bolt position x-Ø1...
(cont'd) bolt pattern ctr Y-ØØ 15.000 inch startinG anGle 20.000 ° rIGhT TrIaNGlE FUNCTIONS With the Machinist Calc Pro 2, you can easily solve Right Triangle problems by simply entering two of four variables: Adjacent, Opposite, Hypotenuse or Angle. right triangle – Based on Adjacent and Opposite Legs Calculate the Hypotenuse, Angle and Adjacent Angle of a right triangle with an Adjacent Leg of 3 Inches and an Opposite Leg of 4 Inches:...
3. solve for the Hypotenuse: hYpotenUse 5.000 inch 4. solve for the Angle (A): anGle (Ө) 53.130° 5. solve for the Adjacent Angle (B): aDJacent anGle 36.870° right triangle – Based on Hypotenuse and Angle Calculate the Adjacent Angle, Adjacent Leg and Opposite Leg of a right triangle with a Hypotenuse of 12 Inches and a known Angle of 35.34°: 1.
(cont'd) 5. solve for the Opposite Leg: o opposite 6.941 inch CIrClE CalCUlaTIONS circumference and area – Based on Diameter Find the Area and Circumference of a circle with a Diameter of 11 Inches: DiaMeter 11id 11. inch circUlar area 95.033 sQ inch circUMference 34.558 inch...
time calculations Using D:M:s Add 7 Hours 45 Minutes 33 Seconds to 11 Hours 16 Minutes 20 Seconds: DMs 7.45.33° 7.45.33+ DMs 19.01.53° 11.16.20= trigonometric functions The following drawing and formulas list basic trigonometric formulas, for your reference: Given Side A and angle a, find: Side C A , a go (Cos) = (e.g., 3i,53.13go (Cos) =)
Page 60
(cont'd) Given Side B and angle a, find: Side A B , a gh (Tan) = Side C B , a ga (sine) = Given Side C and angle a, find: Side A C * a go (Cos) = Side B C * a ga (sine) = Given side A and side C, find: Angle a...
Page 64
appenDix b – DefaUlt settinGs After a Clear All (g*), your calculator will return to the following settings: storeD ValUes DefaUlt ValUe none Material Process face Milling high speed steel tool Tool Number Of Teeth 118° Drill Cut Angle 490 pounds per Weight per Volume cubic foot % Thread Grip...
Page 65
appenDix c – preference settinGs The Machinist Calc Pro 2 has Preference Settings that allow you to customize or set desired unit formats and calculations. If you replace your batteries or perform a Full Reset* (turn calculator off, hold down *, and press O), your calculator will return to the following settings (in addition to those listed on the previous page), with the default setting for each preference listed first:...
Page 66
(cont'd) – 0.000 (fix): calculation results using 3) Functional Machinist functions are always Result displayed to three decimal places. Rounding – 0.0000 (fix): calculation results using Machinist functions are always displayed to four decimal places. – 0. (actUal): calculation results using Machinist functions are always displayed to the maximum number of decimal places.
Page 67
– stanDarD: if units entered are the 5) Volume same – e.g., Inch x Inch x Inch – the Answer answer will remain in this format (Cubic Format Inch), but if units entered are different – e.g., Feet x Feet x Inches – volume answer will be displayed in Cubic Inch.
Math operations ENTErING DImENSIONS Note: Unlike other Calculated Industries/Construction Master calculators, the Machinist Calc Pro 2 does not have a dedicated Feet key. Feet is a secondary function located above the 7 key, so you have to use the g key, then 7 to enter or calculate dimensions using Feet.
14 square Inches 14ii 11 square millimeters 11mm 1.5 cubic meters 1.5g999 3 cubic Feet 3 g 7 g 7 g 7 CONvErSIONS linear conversions Convert 10 Feet 6 Inches to other dimensions, including metric: 10 feet 6 inch 10g76i 126.000 inch 10.5 feet g7 (Feet)
Page 70
(cont'd) Convert 17.32 Feet to Feet-Inch-Fractions: 17.32 feet 17.32g7 (Feet) 17 feet 3-27/32 inch = g7 17.32 feet 207.84 inch 17 feet 3-27/32 inch g7g7 Convert 8-1/8 Inches to decimal Inches. Then convert to decimal Feet: 8-1/8 inch 8i1/8 8.125 inch 0.6770833 feet g7 (Feet) Convert 9.0625 Inches to decimal Feet.
Page 71
Convert 0.05 cubic meters to other dimensions: 0.05 cU M . 05g999 (m) 50000000. cU MM 50000. cU cM g5 (cm) 3051.1872 cU inch 1.7657333 cU feet g7 (Feet) Weight conversions Convert 1.5 tons to pounds and kilograms: 1.5 ton 1.5g6 (tons) 1360.7771 KG g1 (kg)
Page 72
(cont'd) ton 0.4669611 g6 (tons) g1 (kg) KG 423.62003 Mton 0.42362 g3 (met tons) 4. Change the weight per volume back to the default value: lbs./ cU. feet 490g00 (wt/vol) 490. * The number of 0 presses may vary, depending on the last units displayed when wt/vol was last recalled/stored.
Replacement batteries are available at most discount or electronics stores. You may also call Calculated Industries at 1-775-885-4900. battery replacement instructions While the calculator is off, turn the calculator over and use a #1 Phillips screwdriver to remove the battery holder screw located near the center at the top.
Page 75
GUIDElINES 1. Please read the Warranty in this User's guide to determine if your Calculated Industries product remains under warranty before calling or returning any device for evaluation or repairs. 2. If your product won't turn on, check the battery as outlined in the User's guide.
Page 76
Non-warranty repair covers service beyond the warranty period, or service requested due to damage resulting from misuse or abuse. Contact Calculated Industries at the number listed above to obtain current product repair information and charges. Repairs are guaranteed for 90 days.
Page 77
repair service – outside the U.s.a. To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the product. If you cannot reasonably have the product repaired in your area, you may contact CI to obtain current product repair information and charges, including freight and duties.
Class B calculating device, pursuant to Subpart J of Part 15 of FCC rules. legal notes Software copyrighted and licensed by Calculated Industries, Inc., 2014. User's guide copyrighted by Calculated Industries, Inc., 2014. Machinist Calc and Calculated Industries are reg- ®...
FOr NEW IDEaS Calculated Industries, a leading manufacturer of special- function calculators and measuring instruments, is always looking for new product ideas in these areas. If you have a new product idea, please visit our "Bright Idea" page at www.calculated.com/brightidea.asp. For suggestions about improving this product or other products, please visit us at www.calculated.com under "Contact Us".
Page 80
4840 Hytech Drive Carson City, NV 89706 U.S.A. 1-800-854-8075 • Fax: 1-775-885-4949 E-mail: info@calculated.com www.calculated.com Designed in the United States of America. Printed in China. 11/14 Ug4088E-B...
Need help?
Do you have a question about the 4088 and is the answer not in the manual?
Questions and answers