T.O. 1-1A-9

3-156. Deleted. 3-165. Rivets in aluminum alloys 1100(A),5056(B), 2117(AD) are used in the condition

3-157. Deleted. received Alloys 2017(D) and 2024(DD) oftenreferred to as ‘‘Ice Box Rivets’’ require heat treat-3-158. Deleted.ment prior to use (see paragraph 3-43). Rivets in

3-159. Deleted. alloy 2017 and 2024 should be driven immediatelyafter quenching with a maximum delay of 20 min-3-160. Deleted.utes or refrigerated to delay aging. The customary

3-161. Deleted. procedure (unless only a few rivets are involved) isto place the rivets under refrigeration immediately3-162. RIVETING. Riveting is the most commonafter heat treatment The time the rivets may bemethod of assembling components fabricated fromused will depend on refrigeration equipment avail-aluminum. Typical advantages of this method ofable. Cooling to 32oF will retard natural aging tomechanical fastening are simplicity of application,the extent that the rivets may be driven up to 24consistent joint uniformity, easily inspected (X Rayhours. Cooling rivets +0-10oF and below willand other type equipment not required.), low cost,retard natural aging to the extent that the rivetsand in many cases lighter weight.may be retained for use indef initely.

3-163. The rivets used in USAF Weapon System3-166. Rivets utilized with extended driving timestructures require that the alloys and shapes beshould be closely inspected after upsetting forclosely controlled by specif ication/standards, tocracks. If inspection reveals that rivets areassure structural integrity and uniformity. Thesecracked, discontinue use, remove defective rivetsrivets are presently classif ied as solid shank, hi-and obtain reheat treated rivets prior to continu-shear, blind (structural-non-structural) explosive/ing the assembly operation.chemical expanded. They are available in a vari-

ety of shapes, alloys, sizes, lengths and types. The 3-167. If for some reason it is necessary to deter-most common alloys utilized are aluminum mine if a rivet has been heat treated this may bebecause the structure alloys are normally alumi- done by Rockwell Hardness testing. Test by sup-num. In addition some of the aluminum rivet porting rivets in a vee block and hardness readingcharacteristics can be changed by heat treating taken with a 1/16 inch ball 60 kilogram load . Awhich facilitates application (see paragraph 3-37.) hardness of over 75 will indicate a heat treated

rivet.3-164. All of the aluminum alloys could be usedto manufacture rivets; however, due to some alloyshaving superior properties they have been selectedas standard. See Table 3-17 for alloys head, iden-tif ication, MS/AN standard cross references, etc.,for general rivets used on AF weapons systems.

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corrosion from dissimilar metal contact and toassure structurely sound assemblies. The follow-CAUTIONing tables are provided as a general guide forselection of rivet alloy vs assembly alloy.Heat treatment and most other opera-

tions requiring use of heat will be 3-171. The formula Ps = Sb AC can be used toaccomplished prior to installing riv- determine failure in bearing strength. Ps = ulti-ets, since heating after rivets are mate bearing strength of the joints (lbs), Sb =installed will cause warping and pos- specif ied ultimate bearing strength of the platesible corrosion if salt bath is used. (psi) and AC = projected crushing area (bearingThe salt from the bath will contami- area) of rivet, or diameter (sq in) see table 3-20 fornate cracks and crevices of the assem- typical bearing properties of aluminum alloy platesbly and complete removal can not be and shapes.assured.

3-172. Rivet hole preparation is one of the key3-168. Shear strength (ultimate) of a driven rivet factors in controlling successful upsetting of rivetcan be determined by the formula Ps=SsAN. head, material separation and buckling whichPs=ultimate shear strength (pounds), Ss=specif ied weakens the structural strength of the rivet joint,shear strength of the driven rivet (psi), A=cross and corrosion attack of rivets and material aftersectional (area of the driven rivet, normally equal equipment is placed in service/use. The rivet holeto hole cross section (square inch) and N=number should be drilled, punched/reamed to size thatof shear planes. For shear strength of protruding allows the minimum clearance (apprximately 0.003and f lush head rivets see Table 3-19. for thin sheet and up to about 0.020 for 0.750 -

1.000 inch thick material) required to insert rivet3-169. The load required to cause tensile failurewithout forcing. Theoretical rivets holes should beof a plate in a rivet joint can be determined by thecompleted i.e., drilled, reamed to size, deburred,formula Ts=P+ (D-A) Tp. Ts=ultimate tensilechips removed that may lodge or be trapped instrength (pounds), PT = specif ied ultimate tensilebetween surface of metal and treated (anodizedstrength of the plate (psi), D=pitch of the rivetsetc.) before starting to rivet assembly. The above(inch) - pitch is the distance between the center ofcannot always be accomplished especially wheretwo adjacent rivets on the same gauge line,the assembly is large and requires the applicationA=diameter of hole (inch) and Tp=thickness ofof a large amount of rivets due to hole toleranceplate.and variations in holding clamping/pressures. To

3-170. Rivet Selection. Unless otherwise speci- overcome these problems requires that holes bef ied rivets should be selected that have compara- pilot drilled end reamed to size at time rivet is toble strength and alloy as material being assem- be installed. This method has a twofold purpose:bled. This is an important factor in preventing (1) allows easy insertion of rivets, (2) prevents

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elongation of rivet holes and resulting weakening chromate primer or other approved material. Twoof rivet joint. methods for coating rivets and improving protec-

tion of hole surfaces from corrosion are:3-173. Rivet holes drilled/reamed after assemblyis started should be treated by coating with zinc

Table 3-17. General Rivet (Alum) Identification Chart

SUPERSEDING HEAD AND HEATOLD AN/ MS STD FORM MATER- NUMERICAL CONDITION TREAT

STD IAL IDENTCODE

AN456 MS20470 Brazier Head SeeSolid Modif ied AN470

USAF460 See MS20601 1000 Flush Head SeeBlind Type II MS20601Class 2

USAF461 See MS20600 Protruding Head SeeType II Class I MS20601Blind

USAF463 See MS20600 Same Same

NAF1195 See MS20600 Same Same

AN470 MS20470 1100 A-Plain F NoUniversal HeadSolid

5056 B-Raised F NoCross

2117 AD-Dimple T-4 No

2017 D-Raised T-4 YesDot

2024 DD-Raised T-4 YesDash

MS20600 5056 B F NoProtrudingHead-Blind

2117 AD T-4 NoType II,Class I Monel M No

MS20601 5056 B F No100o FlashHead Blind

2117 AD T-4 NoType II,Class 2 Monel M No

MS20602 5056 B F NoProtrudingHead BlindChemicallyExpanded Type

2017 D T-4 NoI, Class I,Styles A & B

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Table 3-17. General Rivet (Alum) Identification Chart - Continued

SUPERSEDING HEAD AND HEATOLD AN/ MS STD FORM MATER- NUMERICAL CONDITION TREAT

STD IAL IDENTCODE

MS20604 5056 B F NoUniversal HeadBlind Class I

2117 AD T-4 NoNon StructMonel M or NoMP (MP =Monel Plated)

MS20605 5056 B F No100o FlashHead Blind

2117 AD T-4 NoClass 2, NonStruct Monel M or No

MP (MP =Monel Plated)

MS20606 5056 B F NoModif iedTrusshead

2117 AD T-4 NoBlind Class 3Non-Struct Monel M or No

MP (MP =Monel Plated)

MS20613 1010 Recessed NoUniversal HeadTriangleSolidAnnealed

302 C-None Annealed No

MS20615 Copper CW NoUniversal HeadAnnealedSolid

Monel Raised Class NoDots A

NOTE: Copper, steel, and monel listed for information purposes only. For special rivets see manufactur-ing drawing, data, specif ication, etc. For other information on rivets see T.O. 1-1A-8/1-1A-1.

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Table 3-17. General Rivet (Alum) Identification Chart - Continued

SUPERSEDING HEAD AND HEATOLD AN/ MS STD FORM MATER- NUMERICAL CONDITION TREAT

STD IAL IDENTCODE

AN426 MS20426 1100 A-Plain F NoCountersunk100o

5056 B-Raised F NoCross

2117 AD-Dimple T-4 No

2017 D-Raised Dot T-4 Yes

2024 DD-Raised T-4 YesDashes

NOTE: See paragraph 3-44 for heat treat data.

AN427 MS20427 1006/ Recessed A NoCountersunk1010 Triangle100o

Copper C-None F- A No302/304 Recessed A No

DashMonel M M-None

AN430 MS20470 Round Head replaced by universal See AN470 + M520470

AN435 MS20435 1006 Head Ident A NoRound HeadRecessedSolidTriangle

NOTE: Listed for Reference only. Copper C-None A No

302/304 F-Head A NoIdentNone

Monel M-None

AN441 Use MS20435 See AN435

AN442 Use MS20470 See AN70+MS20470

AN450 MS20450 1006/ Blank/ A NoCountersunk & 1010/ Noneoval tubular 1015

Note: Listed for Reference only. Copper C-None A No

2117 AD-None T-4 No

Brass B-None Grade B No

MONEL M-None A No

AN455 MS20470 Brazier Head SeeSolid Superse- AN470ded by Univer-sal.

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Table 3-18. General Aluminum Rivet Selection Chart (Rivet Alloy vs Assembly Alloy)

Rivet Alloy Assembly Alloy

1100 1100, 3003, 3004, 5052

2117-T4 (AD) 3003 - H16 and H-18, 5052 - H16and H18, 2014, 2017, 2024, 6061,7075, and 7178

2017-T4 (D), 2024T4 (DD) 2014, 2017, 2024, 5052, 6061,7075 and 7178

5056-H32 (B) 5052 and magnesium alloys, AZ31B, etc.

a. Spraying holes with primer after drilling a. Allow more space for chips to be formedand expelled from tool than allowed for steel.and immediately preceding installation of rivet.

b. Design tools (grind tool) so that chips andb. Dipping rivet in zinc chromate primer andcuttings are expelled away from the work piece.installing while still wet.

c. Keep cutting edges of tools sharp, smooth,3-174. For additional information on rivets free of burrs, wire edges and scratches.(strengths, factors, etc.) see MIL-HDBK-5, T.O.’s 1-

d. Use high machining speeds, moderate feeds1A-8 and 1-1A-1.and depths of cut.

3-175. MACHINING. The resistance encoun- e. Apply lubricant/coolant in large quantitiestered in cutting alminum alloys is low in compari- to tool when cutting.son to other metals. In fact most of the aluminum

3-178. The higher speeds utilized for machiningalloys will machine approximately 10 times fasteraluminum requires:than steel. This factor combined with other

properties, i.e., strength, heat treatability, weight, a. Machines be free of vibration and lostcorrosion resistance, etc. makes aluminum a pre- motion.ferred material in many instances for fabrication

b. Rigid support of tool near cutting edge toof parts by machining. Brass (free machining) isminimize clatter and vibration.the only other material with comparable machin-

ing properties. c. Secure clamping of work to machine toavoid distortion or slippage.

3-176. Personnel accomplishing the work shouldbe properly trained in machining aluminum as d. Use of proper lubricant, cutting compound

or coolants to prevent overheating, warpage/distor-with other types of metals. Due to various circum-tion and to provide adequate lubrication to cuttingstances personnel familiar with machining steeltool.products are required to machine aluminum with-

out proper training/information on speeds, feeds, 3-179. CUTTING TOOLS FOR MACHININGtools etc., required to effectively accomplish a spe- ALUMINUM. There are four general types of toolcif ic task. The purpose of this section is to provide steel material that can be used to machine alumi-a general guide for selection of tools, machining, num. They should be selected in accordance withspeeds, etc. availability and scope of job to be accomplished.The following is a suggested guide for selection of3-177. The tools used for machining aluminumtools:will normally require more rake side-top and oper-

ation at higher/feeds than used for steel. The a. High carbon tool steel is adequate foramount of rake required will depend on composi- machining a small number of parts or where cut-tion, physical form (cast or wrought) and temper. ting speed required is relatively low. This mate-The more ductile or softer the alloy the more rake rial will exceed the performance of some of therequired. The following general practices are rec- other types of tools when used for fragile toolsommended for shaf ing, grinding and maintaining such as drills, taps, etc., because it does not breaktools for cutting aluminum: as easily as the other types. Stock material is

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obtainable in accordance with Federal Specif ica- lard oil such as Specif ication C-O-376 or mineraltion QQ-T-580 where required for local fabrication oil, Specif ication VV-O-241 is recommended. Inof high carbon tools etc. practice it will be found that some machining oper-

ations can be performed dry.b. High speed tool steel is the most common

type used for machining except on the higher 3-182. Tables 3-22 and 3-23 cite suggested turn-silicon alloys. ing speeds, tool angles and feeds. Tool projection

in relation to work should be set at or slightly(1) Availability, reasonable cost. above work piece center line. Sturdy construction

of tools and holders is essential to minimize vibra-(2) Heat resistance (will retain cuttingtion/chatter at the high speeds aluminum alloysedge up to about 950oF dull red).are machined.

(3) Permits use of large rake anglerequired. Federal Specif ication QQ-T-590 applies NOTEto stock material. All the various classes (T1, T2,

Parting tools should have less topT3, etc.) may be used for machining aluminum.rake than turning tools. RecommendClass T1 (18-4-1) general purpose type is the mosttop rake angles of 12o - 20o and frontwidely used.clearances of 4o - 8o grind face con-

c. Where long production runs are involved cave (slightly) and so that cornercemented carbide (solid or tipped) tools give better adjacent to work will lead oppositeservice. The carbide tools have been known to last corner by 4o - 12o or as required forthirty times longer than high speed tool steel. The best results.carbide tools are also recommended for cutting

3-183. MILLING - ALUMINUM. Milling of alu-high silicon content alloys. Because of the brittle-minum alloys should be accomplished at high cut-ness of the cemented carbide tool the cutting angleter speeds. The limitations will usually depend onshould be greater than those recommended forthe machine and type cutters used. The reason forhigh carbon/high speed steels.the higher cutter speeds is that at low speeds the

d. Diamond tipped tools should only be used cutters will have a tendency to load and gum. Thisfor light f inishing cute or special f inishing opera- will normally clear as the speed is increased.tions. Normal cutting of 75o - 90o are used withtop rake angles of 6o - 10o. Tool projection (or set) 3-184. The tooling for milling should be selectedshould be slightly above center line (CL) of the according to the operation and duration/size of jobwork. to be performed. The cutters should have fewer

teeth and should be ground with more top and side3-180. TURNING. To properly perform the turn- rake than those used for milling steels. Most oper-ing operation f irmly attach the work to the ations can be accomplished with spiral cutters.machine (lathe) chuck, collet or faceplate. The Nick tooth cutters are used when reduction in sizework should be held in the best manner to mini- of chips is required. Solid-tooth cutters with largemize distortion from chuck or centrifugal force helix angles are used where free-cutting tools areaction during the turning operation. Long rods/ required. When cutters with large helix angles arestock should be supported by ball or roller bearing used it is often necessary that two interlockingtailstock centers which are more satisfactory than cutters of opposite helixes be employed to alleviatesolid or f ixed centers in resisting thrusts from axial thrust.centrifugal force and thermal expansion. Soft lin-ers may be used between work and machine jaw 3-185. Tool alloys should be selected for millingfaces to prevent jaw teeth from damaging/marring aluminum as follows:work piece. When it is necessary that work beheld by clamping from inside diameter outward a. For short runs high carbon steel is nor-the tightness of jaws should be checked frequently mally satisfactory.to be sure that work is not being released as a

b. For production runs of extended durationresult of thermal expansion.high speed steel is recommended.

3-181. The recommended cutting f luids are thec. Where climb milling/high speeds are uti-soluble oil emulsion which combine the functions

lized, carbide tipped tools are recommended forof cooling and lubricating for general purpose use.extended runs.For heavy cutting especially when speeds are low,

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Table 3-19. Shear Strength of Protruding and Flush Head Aluminum Alloy Rivets, Inch Pounds

Size of Rivet(In Dia) 1/16 3/32 1/8 5/32 3/16 1/4 5/16 3/8

Alloy + driven temper 99 203 363 556 802 1,450 2,290 3,2805056 FSU = 28 KSI

2117-T321, FSU = 30 KSI 106 217 388 596 862 1,550 2,460 3,5102017-T31, FSU = 34 KSI 120 297 442 675 977 1,760 2,970 3,9702017-T3, FSU = 38 KSI 135 275 494 755 1,090 1,970 3,110 4,4502024-T31, FSU = 41 KSI 145 296 531 815 1,180 2,120 3,360 4,800

FSU = Average Shear Strength of alloy in specif ied temper.

KSI = 1000 lbs square inch example: 34 KSI = 34,000 lbs per square inch.

Single shear rivet strength correction factor (resulting from use in thin plates and shapes).

Sheet thickness (in)

0.016 0.0964

0.018 0.0984

0.020 0.0996

0.025 1.000 0.972

0.032 1.000 0.964

0.036 0.980

0.040 0.996 0.964

0.045 1.000 0.980

0.050 0.996 0.972

0.063 1.000 1.000 0.964

0.071 0.980 0.964

0.080 0.996 0.974

0.090 1.000 0.984

0.100 0.996 0.972

0.125 1.000 1.000

0.160

0.190

0.250

Double shear rivet strength correction factor (resulting from use in thin plates and shapes)

SIZE OF RIVETS

Sheet Thick Inch 1/16 3/32 1/8 5/32 3/16 1/4 5/16 3/8

0.016 0.688

0.018 0.753

0.020 0.792

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Table 3-19. Shear Strength of Protruding and Flush Head Aluminum Alloy Rivets, Inch Pounds - Continued

0.025 0.870 0.714

0.032 0.935 0.818 0.688

0.036 0.974 0.857 0.740

0.040 0.987 0.896 0.792 0.688

0.045 1.000 0.922 0.831 0.740

0.050 0.961 0.870 0.792 0.714

0.063 1.000 0.935 0.883 0.818 0.688

0.071 0.974 0.919 0.857 0.740

0.080 1.000 0.948 0.896 0.792 0.688

0.090 0.974 0.922 0.831 0.753

0.100 1.000 0.961 0.870 0.792 0.714

0.125 1.000 0.935 0.883 0.818

0.160 0.987 0.835 0.883

0.190 1.000 0.974 0.935

0.250 1.000 1.000

Note: Values (lbs) of shear strength should be multiplied by the correction factor whenever the D/T =rivet diameter/plates sheet or shape thickness ratio is large enough to require correction. Example:Rivet diameter 1/8 (alloy 2117 - T3) installed in 0.040 sheet, shear factor is 388 lbs correction factor0.996 =

3880.996

23283492

3492386.448 corrected shear pounds

Table 3-20. Bearing Properties, Typical, of Aluminum Alloy Plates and Shapes

Edge Distance = 1.5 Edge Distance = 2.0XX Rivet Diameter X Rivet Diameter

Alloy Yield Strength Ultimate Strength Yield Strength Ultimate Strength

1100 - 0 10,000 21,000 12,000 27,000

1100 - H12 18,000 23,000 21,000 29,000

1100 - H14 22,000 24,000 23,000 31,000

1100 - H16 23,000 16,000 26,000 34,000

1100 - H18 27,000 19,000 32,000 38,000

3003 - 0 12,000 22,000 15,000 34,000

3003 - H12 21,000 27,000 24,000 36,000

3003 - H16 28,000 34,000 33,000 42,000

3003 - H18 32,000 38,000 38,000 46,000

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Table 3-20. Bearing Properties, Typical, of Aluminum Alloy Plates and Shapes - Continued

Edge Distance = 1.5 Edge Distance = 2.0XX Rivet Diameter X Rivet Diameter

Alloy Yield Strength Ultimate Strength Yield Strength Ultimate Strength

2014 - T4 56,000 93,000 64,000 118,000

2014 - T6 84,000 105,000 96,000 133,000

2024 - T3 64,000 102,000 74,000 129,000

Alclad 2024-T-3 60,000 96,000 69,000 122,000

2024 - T36 80,000 110,000 91,000 139,000

Alclad 2024-T36 74,000 100,000 85,000 127,000

5052 - 0 25,000 46,000 30,000 61,000

5052 - H32 37,000 54,000 42,000 71,000

5052 - H34 41,000 59,000 47,000 78,000

5052 - H36 47,000 62,000 54,000 82,000

5052 - H38 50,000 66,000 58,000 86,000

6061 - T4 29,000 56,000 34,000 73,000

6061 - T6 56,000 72,000 64,000 94,000

7075 - T6 101,000 123,000 115,000 156,000

Alclad 7075-T6 94,000 114,000 107,000 144,000

3-186. Milling cutters should be inclined to work The slower cutting speeds can be overcome toand beveled on leading corner (least bevel for f in- some extent by securely anchoring the work to theish cuts) to minimize clatter. machine and using heavy rough cutting feeds.

The tools used for rough cut should be (round3-187. The cutting f luids for milling aluminum nose) of heavy construction and properly ground toshould combine cooling and lubrication properties. operate eff iciently. Rough cut tools should beCoolant lubrication should be applied under pres- ground with moderate amount of rake to providesure (atomized spray if available) in large quanti- maximum cutting edge support. Finish tool shouldties to tool and work. The recommended cutting have more top rake and an extra large amount off luids are water base cutting f luids such as solu- side rake. Finishing tool shall be used with f ineble oils and emulsions, mixed 1 part to 15 for high feeds only due to the additional side and top rakespeeds and 1 part to 30 for low speed cutting. (f inish cut should not exceed 0.018 inch).

3-190. Most cutting operations by shaping and3-188. Tables 3-24 and 3-25 cite suggestedplanning can be accomplished without cuttingspeeds, contour and tool angles, for milling alumi-f luids, however f ine f inishing can be improved bynum. The best combination of cutting speeds, feedlubrication. Recommended cutting compounds areand cut for a given job will depend on design ofkerosene, mixture of 50-50 lard-oil and soluble oil.tool/cutter, kind of tool material, condition of

machine, machine power, size, clamping method 3-191. Tables 3-26 and 3-27 cite suggested turn-and type material being worked. ing speeds, tool angles and feeds. Secure clampingof work is re-emphasized especially when heavy3-189. SHAPING AND PLANING. The speed atcutting feeds are to be used.which aluminum alloys can be cut by planing and

shaping is somewhat slower in comparison to othermachining methods, due to equipment design andlimitations.

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Table 3-21. Standard Rivet Hole Sizes with Corresponding Shear and Bearing Areas for Cold Driven Aluminum Alloy Rivets

3-192. DRILLING ALUMINUM ALLOY. Stan- machine/drill motor to be utilized. The followingdard type twist drills may be used satisfactorily is a general guide for the selection of drills andfor many drilling operations in aluminum alloys. recommended speeds:However, better results can be obtained with

a. Drill press.improved designed drills where soft material anddrilling of thick material or deep holes are Point Angle: 118o - 140o for general work and 90o -involved. These drills are usually designed having 120o for high silicon.more spiral twists per inch (see f igure 3-2). The Spiral Angle: 24o - 28o for thin stock and mediumadditional spiral twist gives more worm action or depth holes up to 6 times drill diameters, 24o - 48o

force to drill causing the drill to cut/feed faster and for deep holes over 6 times drill diameter.is helpful in removing chips, especially in deephole drilling operations.

3-193. Generally a drill for a given job should beselected according to the thickness, type alloy and

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Table 3-22. Turning Speeds and Feeds

CUTTINGALLOY TYPE CUT INCHES SPEED FEED, IN./REV OPER TOOLAND TEMPER FPM MATERIAL

Soft Series, 0.250 Maximum 700 - 1600 0.050 Maximum Rough Plain high1100 All temp carbon/high

speed

5052-H12, H14 0.040 Maximum 1500 - 3500 0.004 - 0.015 Finish Plain highcarbon/highspeed

2011-2024-0 0.250 Maximum 4000 - 7000 0.012 Maximum Rough Carbide

5056-0-6061-0 0.020 Maximum 6000 - 8000 0.010 Maximum Finish Carbide

7075-0, 113 0.010 Maximum At Minimum 0.002 - 0.005 Finish only Diamondvibration

138, 214, 212

750, 220, 122

HARD SERIES 0.200 Maximum 400 - 650 0.007 - 0.020 Rough Plain highcarbon/highspeed

108, 319, 43 0.020 Maximum 600 Maximum 0.002 - 0.004 Finish Plain highcarbon/highspeed

5052-H34, H36, 0.200 Maximum 500 - 1300 0.010 Maximum Rough CarbideH38

T4, 2024-T3 0.020 Maximum 700 - 2500 0.010 Maximum Finish Carbide

7075-T6, 7178- Not recom- Rough DiamondT6 mended tipped

6061-T4, T6, 0.006 Maximum At minimum 0.002 - 0.004 Finish Diamondetc. vibration tipped

HIGH SILICON 0.120 Maximum 600 Maximum 0.007 - 0.020 Rough Plain highSERIES carbon/high

speed

0.020 600 Maximum 0.002 - 0.004 Finish Plain highcarbon/highspeed

4032, 333, 0.120 Maximum 500 - 1000 0.008 Maximum Rough Carbide

A132, 132, 356 0.020 Maximum 500 - 1500 0.004 Maximum Finish Carbide

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