INCH STANDARD COUNTERBORE - Electroimpact

1 REV. F 06/02/2005 SCREWSCREWCAP HEADCAP HEADSOCKET CLEARANCEC'BORECLEARANCEC'BOREC' (MAX)(MAX)(CLOSE)(CLOSE)(FREE)(FREE)H'DH d'D'd'D'# # #2# # #4# # # #6# # # #8# # # #101 +/- FREECLOSECLEARANCE SHOULD BE USED UNLESS CLOSE IS REQUIREDINCH STANDARD COUNTERBOREDHdD'H'd'Printed copies of Electroimpact standards are for reference only and are not subject to revision H 06/02/2005 SCREWSCREWCAP HEADCAP HEADSOCKET CLEARANCEC'BORECLEARANCEC'BOREC' (MAX)HEIGHT (MAX)SIZEDIA. (CLOSE)DIA. (CLOSE)DIA. (FREE)DIA. (FREE)DEPTHSIZEdDHd'D'd'D'H' : " FREE SIZES " AND AND THREAD PITCHES SHOULD ALWAYS BE SPECIFIED, ARE NOT McMASTER CARR STANDARD CUTTING TOOLSBUT WHEN METRIC THREADS ARE SPECIFIED WITHOUT A PITCH, FREE SHOULD BE USED UNLESS CLOSE IS REQUIREDTHE FOLLOWING PITCHES ARE TO BE USED:TOLERANCES +/- M 2X.

2 40M 6X 16X .45M 8X 20X 3X .50M 10X 24X 4X .70M 12X 30X 5X .80M 14X METRIC COUNTERBOREDHdD'H'd'11/4/2015 Printed copies of Electroimpact standards are for reference only and are not subject to revision E 06/02/2005 SCREWSCREWFLAT HEADFLAT HEADSOCKET C' d'SIZEdD (max)H (max)D'CLOSE # #2# #4# # #6# # #8# # #101 DIAMETERS ARE BASED ON THE THEORETICAL MAXIMUM HEAD DIAMETER AT A DEPTH OF .005 TO .015 AND AN ANGLE OF 82 DEGREES. ACTUAL DEPTH MAY VARY DEPENDING ON ACTUAL HEAD DIAMETER AND ANGLECOUNTERSINK DIAMETER TOLERANCES ARE +/- .010 COUNTERSINK ANGLE TOLERANCES ARE +/- 2 DEGREESFREE SHOULD BE USED UNLESS CLOSE IS REQUIREDINCH STANDARD COUNTERSINK82 D'd'DdHPrinted copies of Electroimpact standards are for reference only and are not subject to revision H 06/02/2005 SCREWSCREWFLAT HEADFLAT HEADSOCKET d'SIZEdD (max)H (max) CLOSE inmminmmin DIAMETERS ARE BASED ON THE THEORETICAL MAXIMUM HEAD DIAMETER AT A DEPTH OF.

3 005 TO .015 AND AN ANGLE OF 90 DEGREES. ACTUAL DEPTH MAY VARY DEPENDING ON ACTUAL HEAD DIAMETER AND ANGLE COUNTERSINK DIAMETER TOLERANCES ARE +/- .010 COUNTERSINK ANGLE TOLERANCES ARE +/- 2 DEGREES THREAD PITCHES SHOULD ALWAYS BE SPECIFIED, BUT WHEN METRIC THREADS ARE SPECIFIED WITHOUT A PITCH, THE FOLLOWING PITCHES ARE TO BE USED: M 2X .40M 12X 24X M .45M 6X 14X 30X M 3X .50M 8X 16X M 4X .70M 10X 20X ' D'd'DdHPrinted copies of Electroimpact standards are for reference only and are not subject to revision FLATSREV. D 11/1 should be .866x round size to make flat the same length as on a hex headPrinted copies of Electroimpact standards are for reference only and are not subject to revision copies of Electroimpact standards are for reference only and are not subject to revision INSTALLATION Torque values for purchased components or specified on Electroimpact assembly drawings supersede the values shown in the table.

4 Torque (Class )Torque (Class ) & Low HeadTorque (Class ), Flathead, ButtonHeadMinimum EngagementNotes:1. M5 and under bolts apply purple Loctite 222 or equivalent, except flat heads and button heads anti-seize M6 - M10 bolts apply blue Loctite 243 or equivalent, except flat heads and button heads anti-seize M12 and over bolts apply copper anti-seize or Minimum thread engagement shown should be checked prior to installing bolt. Values shown are for ASTM A36 steel tapped holes with Class bolts. If minimum engagement cannot be obtained contact the engineer responsible for the assembly about using a reduced torque Loctite or anti-seize should be applied to thread and underside of bolt head or Plated class fasteners need to be re-torqued after a minimum of 24hrs from initial torquing to check for hydrogen Closely spaced patterns of bolts attaching a single component, such as slewing rings, should be torqued in an alternating sequence and in steps up to the final torque.

5 8. Critical bolts that have been fully torqued should not be Values shown are calculated according to VDI2230:2005 using a friction factor of .12 for Loctited bolts and .10 for anti-seize coated bolts to stress the bolt to 90% of Smith 11/4/2015 Internal Thread Minor Diameter LimitsRev A 6/24/04 InchMetricClass 2 BClass 6 HThreadMinMaxThreadMinMaxMin 2 X . X . 3 X . 4 X . 5 X . 6 X 8 X 10 X 12 X 14 X 16 X 20 X 24 X 30 X metric threads start5 page 1645 in Machinery's Handbook3 unified threads starton page 1544 in Machinery's HandbookCopied from Machinery's Handbook and is for reference onlyFor metric threads where the pitch is not called out on the drawing,see the countersink/ COUNTERBORE standardsMetricInchPrinted copies of Electroimpact standards are for reference only and are not subject to revision or Low Carbon Steel Definition -Rev.

6 A 3/28 max max max copperNo other significant alloying elements allowedMaterial PropertiesEasily weldable, formable and machineableTypical .2% yield point 15-50ksiExamplesAISI 1018, 1020 ASTM A36, A500 Recommended Drawing Note: Mild steel vendor to confirm suitability of specific material used with Electroimpact engineer prior to manufacture. Printed copies of Electroimpact standards are for reference only and are not subject to revision Weld Stress Relief Guidelines6/7/13 Rev. AStress relieve ?ReasonsYesWelded steel lifting beams should be stress relievedA YesWelded steel tooling that has machining operationsB, CYesWelded steel tooling that has no machining operationsCYesWhen required by customer or Government codesEYesWhen required by material, such as some higher strength materialsNoWelded steel carts, tables, handrails, staircases steel FlooringNoAll thin walled welded steel items with T < ?

7 DATo make sure the calculated safety margin to failure is valid stresses caused by external loading are not superimposed on top of internal stresses present from prevent the residual stresses from welding causing pinging and shifting during machiningCTo prevent the residual stresses from welding causing movements over the lifetime of the toolingDMaterial is not thick enough to have internal stress gradients because rate of cooling is approximately the same through a thin thicknessELegal or Contract requirementsReferences: copies of Electroimpact standards are for reference only and are not subject to revision control.