Precision Drill Jig Bushings
PRECISIONDRILL JIG r:PRINTED IN U.S.A. COPYRIGHT 2008 CARR LANE MANUFACTURING CO. 11952-703
WHAT MAKES A CARR LANEDRILL BUSHING BETTER?1Carr Lane drill bushings are allprecision honed and ground, thefinest quality available. Theyexceed all ANSI drill-bushingstandards. Unlike some of ourcompetitors, we manufacture onlyfirst-quality drill bushings, never“economy grade.”TOPQUALITY2Our nationwide network of stockingdistributors, plus huge inventoriesat two warehouse locations,guarantees same-day shipment forstandard bushings. In addition, ourquick-response manufacturingcapabilities allow us to ship almostall special and modified bushings inless than 10 days.FASTDELIVERYDrill Bushing FactoryAustin, Texas3ECONOMICALPRICESMain Factoryand WarehouseSt. Louis, Missouri As you expect with all Carr Laneproducts, our drill-bushing prices arethe most competitive around. Ourproduction volumes and advancedmanufacturing techniques meanexcellent value for you.
INDEXBushing Selection .p. 2-3Installation and Technical Data .p. 4-5Counterbore Data .p. 6PPress Fitp. 9-13SFSlip/FixedRenewablep. 21-25HLSPSerratedPress Fitp. 19-20FMFlat MilledRenewablep. 26-27ULHeadLinerp. 31-32LockingLinerp. 33CHDCChipBreakerp. 36-37DirectedCoolantp. 38-39DGSGLLinerp. 28-30Lockscrewsand Clampsp. 34-35OilGroovep. 40-42ULDDiamondGroovep. 43-44SerrataGroovep. 45Diamond KnurlLocking Linerp. 46EZGDTemplateEZ Castp. 47CBCircuit Board(Please see ourweb catalog)(11/09)HHeadPress Fitp. 14-18Gun Drillp. 54-56AAir Feedp. 57-68TBp. 48-51Air-FeedAccessoriesp. 69-721BU
BUSHING SELECTIONUSAP - 20 - 8 TypeODLengthin 64ths in 16thsof an inch of an inchFLAT MILLED RENEWABLE:METRIC.1250PM - 8 - 12 - 4.50ID as4-placedecimal inchTypeODinmmLengthinmmIDas 2-placedecimal mmPRESS FIT:Types FM and FMC (carbide). Replaceable bushing used for extraresistance to rotational forces under harsh conditions. This bushing,generally used with a liner, has a milled locking flat to allow fastening securely with a flat clamp. FM bushings also have a standardrecess on the other side to allow using a lockscrew instead.LINER:Types P, PC (carbide), and PM (metric). This is the most-popularand least-expensive drill bushing. P bushings are permanentlypressed into the jig plate, usually flush with the top surface. They aregenerally used for single-step drilling or reaming operations whenyou do not expect to replace bushings during the tooling’s lifetime. Pbushings can be mounted closer together than headed bushings, butoffer less resistance to heavy axial loads.HEAD PRESS FIT:Types L and PM (metric). Liners are permanent bushings used tohold renewable drill bushings. The liner’s ID has a precise sliding fitwith the renewable bushing’s OD. The hardened liner accuratelylocates the renewable bushing and protects the jig plate from wearcaused by frequent bushing replacement. Note: Metric liner bushingsare the same as metric press-fit bushings.HEAD LINER:Types H, HC (carbide), and HM (metric). Similar to a P bushing, butwith a head to resist heavy axial loads. H bushings are permanentlypressed into the jig plate. They are generally used for single-stepdrilling or reaming operations when you do not expect to replacebushings during the tooling’s lifetime. The head can be left exposed,or recessed by counterboring the installation hole. Note: The “length”listed for a USA head-press-fit bushing refers to its length under thehead, while the metric version’s “length” is its overall length.SERRATED PRESS FIT:Types HL and HM (metric). Similar to an L bushing, but with a head toresist heavy axial loads. Head liners are permanent bushings used tohold renewable drill bushings. The head liner’s ID has a precise slidingfit with the renewable bushing’s OD. The hardened head liner accurately locates the renewable bushing and protects the jig plate from wearcaused by frequent bushing replacement. Note: The “length” listed for ahead liner refers to its overall length, not its length under the head. Metrichead-liner bushings are the same as metric head-press-fit bushings.UN-A-LOK LINER:Types SP and SPM (metric). Similar to a P bushing, but with top serrations to prevent rotation in soft materials. Recommended in hightorque situations for materials such as magnesium, aluminum,masonite, or wood. Finish-ground OD ensures accurate ID location.Serrations also resist axial force to prevent pushing the bushingthrough the jig plate.SLIP/FIXED RENEWABLE:Types UL and ULM (metric). Similar to an HL head liner, but incorporating a special locking tab that eliminates the need for alockscrew. Un-A-Lok liners are permanent bushings used to holdSF renewable drill bushings (on the “slip” side only, not the “fixed”side). Although slightly more expensive than a head liner plus a lockscrew, installation time is dramatically reduced.CHIP BREAKER:Types SF, SFC/SC/FC (carbide), and SFM (metric). Replaceablebushing generally used with a liner bushing and lockscrew. Usewhen you expect to replace bushings during the tooling’s lifetime, orwhen you want to switch bushings to perform multi-step operationswith the same tooling. SF bushings combine the benefits of older Stype slip-renewable and F-type fixed-renewable bushings: One sidehas a small recess for fixed mounting; the other has a locking recessthat allows the bushing to slip down, then lock in place by rotating it.S and F types are now obsolete (except in carbide) and combinationSF bushings will be furnished at no extra charge.2BUTypes CH and CHM (metric). Similar to an SF renewable bushing, butwith specially designed chip-breaking notches on the drill-exit end. Useto break up chips from tough, stringy materials, to reduce friction andheat buildup. Reduces bushing wear at the drill-exit end and reducesthe chance of tool or workpiece damage. A chip-breaker bushingshould extend beyond its liner to allow chips to escape. Chip breakersare also available on other bushing types such as P, H, and DC.(12/03)
BUSHING SELECTIONDIRECTED COOLANT:EZ CAST LINER:Types DC, DCCH (chip breaker), DCL (liner), and DCHL (headliner). Similar to an SF renewable bushing, but with passages todirect coolant to the cutting area. This design is particularly good forwashing away chips, especially when ordered as the combinationDirected Coolant Chip Breaker (DCCH). DC bushings require special liners, DCL or DCHL, to direct coolant from a drilled manifoldpassage to the holes in the bushing’s OD wall.Type EZ. Another liner for cast-in-place or potted installation, used tohold SF renewable drill bushings. Unlike diamond-knurl unilock liners,EZ-cast liners hold either the “slip” or “fixed” side of an SF bushing,since they include an integral lockscrew holder. Diamond-knurled ODprovides superior holding strength against both rotational and axialforces. Since the bushing’s OD is not ground, keep the ID accuratelylocated during casting or potting to ensure accuracy in the finishedtool.OIL GROOVE:GUN DRILL:DrillCoolant passageOil grooves are available on most drill-bushing types, including P, H,and SF. Use when you need complete drill lubrication and cooling,such as when drilling hardened steel. Oil grooves are speciallydesigned coolant passageways in the bushing’s ID wall. Choosefrom 25 different groove styles. End wipers are also available, tokeep out dirt and chips.DIAMOND GROOVE:WorkpieceTypes GD, GDL (liner), and GDI (insert). Drill bushings for gun-drillingmachines, such as Eldorado, Drillmation, DeHoff, and Lahr. Gun drillbushings are similar to SF renewable bushings, but with the drill bearing at the bushing’s head end. Depending on the gun-drilling machine,bushings are either one-piece or two-piece (a liner and an insert).TEMPLATE:Types DG and DGM (metric). A bushing for cast-in-place or pottedinstallation. Diamond-knurled OD provides superior holding strengthagainst both rotational and axial forces. Since the bushing’s OD isnot ground, keep the ID accurately located during casting or pottingto ensure accuracy in the finished tool.SERRATA GROOVE:BushingRetainerRingType TB. An economical bushing designed for thin template jig platesfrom 1/16- to 3/8-inch thick. Bushings are held in place by a retainerring. The OD serrations prevent the bushing from spinning. Bushingscan be removed and reused by breaking the aluminum retainer ring(extra retainer rings available).CIRCUIT BOARD:Type SG. Can be cast in place or potted, just as a diamond-groovebushing, or can also be pressed into an installation hole. Straight knurlprovides less resistance to axial loads than the diamond knurl on a DGbushing. Since the bushing’s OD is not ground, keep the ID accuratelylocated during casting or potting to ensure accuracy in the finished tool.DIAMOND-KNURL UN-A-LOK LINER:Types CB and CBC (carbide). Headless and head-type bushingsmade especially for circuit-board drilling machines. Available forElectro-Mechano, Excellon, Waco, Digital, Nationwide, Edlund,Tektronix, Leland-Gifford, Palomar, Hughes, Rapidrill, and Reliabledrilling machines.AIR-FEED DRILL:Types ULD and ULDM (metric). A liner for cast-in-place or pottedinstallation, used to hold SF renewable drill bushings. Un-A-Lok liners incorporate a special locking tab that eliminates the need for alockscrew. Holds only the “slip” side of an SF bushing, not the “fixed”side. Diamond-knurled OD provides superior holding strengthagainst both rotational and axial forces. Since the bushing’s OD isnot ground, keep the ID accurately located during casting or pottingto ensure accuracy in the finished tool.(12/03)CollarShankReducerType A. Drill-bushing shanks, collars, adaptors, and locking accessories for air-feed drills, tappers, and back-spotfacers. Available for allstandard drill motors, including Gardner-Denver, Keller, Aro, Buckeye,Quackenbush, Desoutter, and Ingersoll-Rand.3BU
INSTALLATION AND TECHNICAL DATAaccurate and round, because these bushings are more-easily distorted. For very-close hole spacing, especially withheaded bushings, specify bushings with ground flats.RECOMMENDED CHIPCLEARANCE:1/2 to 1-1/2 timesdrill diaTo minimize drill bending and maximize hole accuracy, mountdrill bushings as close to the workpiece as possible while stillallowing adequate chip clearance. The necessary clearancedepends on workpiece material and chip stringiness. Forexample, cast iron, with fine chips requires about 1/2 timesdrill diameter for chip clearance. Materials that produce long,stringy chips, such as cold-rolled steel and aluminum, requireat least one-drill-diameter clearance. To reduce clearanceeven with long, stringy chips, exit-end chip breakers are available see pages 42-43.Direct workpiece contact is usually not recommended. Chipscan escape only up through the drill’s flutes, drill-bearinglength is shortened by the drill point’s length, and drill-withdrawal burrs can raise the jig plate. Direct contact may benecessary, though, for maximum bearing length when drillingsloped surfaces (see below). Also, reamer bushings can bemounted much closer than drill bushings, due to much finerchips, for more-accurate hole finishing.INSTALLATION-HOLEPREPARATION:Excessive interferencecauses bellmouthingTo avoid jig-plate or bushing distortion, do not use excessiveinterference fits on press-fit bushings. See table below forrecommended hole sizes in unhardened steel or cast iron jigplates. Always prepare installation holes using a jig borer orreamer. Standard chucking reamers (with a plus tolerance)usually produce installation holes to the tolerances shown inthe table. Other factors to consider are: (1) headed bushingsrequire less interference to resist drilling thrust; (2) longerbushings in thick plates require less interference; (3) bushings with thinner walls are more prone to distortion; (4) lessductile jig-plate materials require less interference.METRICPRESS-FITBUSHING ODSLOPED WORKPIECE SURFACES:USAPRESS-FITBUSHING ODAngledexit endWhenever the drilling axis is not perpendicular to the workpiece surface, locate the exit end as close to the part as possible. Otherwise the drill will tend to wander. For maximumdrill guiding, we recommend specifying bushings with anangle milled on the exit end, tangent to the workpiece surfaceat point of entry.SPECIAL BUSHINGS FOR CLOSEHOLE SPACING:When holes are located close together, special bushings aresometimes required. Thinwall bushings, where the bushingID is larger than the normal ID range for a given OD, are oftena good solution. Holes for thinwall bushings must be 105mm115mm125mmRECOMMENDEDHOLE SIZE(H7)ACTUAL 5.079mm 105.000-105.035mm115.101-115.079mm 115.000-115.035mm125.117-125.092mm 125.000-125.040mm(8/98)
INSTALLATION AND TECHNICAL DATAUNGROUND BUSHINGS AVAILABLEFOR OVERSIZE HOLES:Unground ODANSI standards. Counterbores prevent binding and heatbuildup due to excessive bearing length. See chart on page 6for ANSI counterbore depths. Counterbore diameters aregenerally 1/32 inch larger than the inside diameter, and areangled at the bottom for smooth entrance. No-counterborebushings are available on request as specials.DRILL ENTRANCE RADIUS:RadiusWe offer bushings with unfinished ODs for custom-fitting tooversize holes. They are slightly larger than nominal diameter to provide grinding stock, .005-.020 extra, depending onthe OD size (see charts under each specific bushing type).We recommend grinding on a mandrel to hold ID/OD concentricity.INSTALLATION shings feature a blended and polished radius at the drillentrance end for smooth drill entry and proper alignment, preventing drill wear and breakage. Radius size varies in proportion to drill size.CONCENTRICITY:.0003 AWasherWe recommend installing bushings with an arbor presswhenever possible. If the bushing’s OD is large enough, youcan also use a drawbolt with two washers as shown above.If a hammer is the only tool available, do not strike the bushing directly or it could fracture. Use a soft-metal punch tocushion the blows. Before installing a press-fit bushing, lubricate the inside of the mounting hole and outside of the bushing with a lubricant such as lithium grease. Otherwise thebushing may score the mounting hole, and may be difficult toreplace later.GROUND LEAD FOREASY INSTALLATION:OD-A-IDBushing OD is ground concentric to the ID to within .0003 TIRfor ID sizes from 1/8 inch to 1/2 inch (3mm to 12mm), unlessotherwise indicated. For larger or smaller sizes, concentricityis within .0005 TIR. Unground bushings are concentric towithin .006 TIR. On counterbored bushings, concentricityapplies only over the drill-bearing length.OTHER TOLERANCES:HeaddiameterGround lead45 ChamferAll bushings feature a concentric ground lead and a 45 chamfer on the exit end to ensure perfect alignment duringinstallation.COUNTERBORES ON LONGBUSHINGS:Long bushings with small IDs are slightly counterbored forproper drill-bearing length and chip clearance, as specified by(5/05)LengthHeadthicknessAny dimensions where tolerances are not specifically listedare held to /- .010 inches on standard ANSI sizes, and /-.015inches on larger sizes (extended range). Special tolerancesfor any dimension are available on request as specials.MATERIAL:Standard drill-bushing material is durable 1144 Stressproofsteel, heat treated to achieve RC 62-64 ID hardness, and otherhigh-carbon steels. Optional materials such as tungsten carbide (Grade C2 carbide with steel head), 52100 steel, A2 toolsteel, D2 tool steel, M2 tool steel, 416 stainless, 440C stainless,17-4PH stainless, 303 stainless, 660 bronze, Ampco 18bronze, Ampco 21 bronze, Oilite, and brass are available asspecials. See pages 13, 19, and 27 for carbide bushings.5BU
COUNTERBORE DATATYPE P — DRILL BEARING .4375.5313BUSHING FULLTYPE H — DRILL BEARING 0.3160.4375.5313BUSHING LENGTH (UNDER ULLFULLFULLFULLFULLFULLTYPES SF & FM — DRILL BEARING 249.1935.2280.2900.1889.3438.5625BUSHING LENGTH (UNDER ULLFULLFULLFULLFULL(3/01)
SPECIALSCheck for adequate wall thickness by calculating the ratio ofID divided by OD:1. SPECIAL ID SIZE (WITHINLISTED ID RANGE):With standard OD, standard length, and standardtolerances.Up to 1/4" ODOver 1/4" to 1/2" ODOver 1/2" ODID/OD must be .70ID/OD must be .75ID/OD must be .80Please contact factory for pricing.Special ID sizes include any ID size that is not a standardfractional, number, letter, or metric drill size as listed on theback cover of our catalog (reamer and tap-guide ID sizes arespecials). To price, add a prorated 55.00 setup charge tothe quantity price for the standard OD and length.4. SPECIAL OD SIZE:With standard ID and length for the next-larger OD, andstandard tolerances.Example: (6) H-10-8-.0365List price for H-10-8 27.83Quantity price for H-10-8 ( 27.83 less 18%) 55.00 setup divided by 6 22.82 9.17 31.992. ID SIZE SMALLER THAN LISTEDRANGE:With standard or special ID, standard OD, standard length,and standard tolerances.To price, compare price for the standard OD and length withthe price for the largest bushing of the same length with theID within range. Add a prorated 55.00 setup charge to thehigher of the two.Example: (6) H-16-8-.0820List price for H-16-8 (low)List price for H-13-8 (high) 12.05 13.27Quantity price for H-13-8 ( 13.27 less 18%) 55.00 setup divided by 6 10.88 9.17 20.053. ID SIZE LARGER THAN LISTEDRANGE (THIN-WALL BUSHINGS):With standard or special ID, standard OD, standard length,and standard tolerances.(3/09)To price, add a prorated 55.00 setup charge to the quantityprice for the same-length bushing with the next-largerstandard OD. Head dimensions for the next-larger size willbe used unless otherwise requested.Example: (6) H-18-8-.1250List price for H-20-8 9.85Quantity price for H-20-8 ( 9.85 less 18%) 55.00 setup divided by 6 8.08 9.17 17.255. SPECIAL LENGTHWith standard ID, standard OD, standard tolerances, andlength shorter than maximum listed length.To price, add a prorated 55.00 setup charge to the quantityprice for the next-longer standard length.Example: (6) H-16-14-.1250List price for H-16-16 20.03Quantity price for H-16-16 ( 20.03 less 18%) 55.00 setup divided by 6 16.42 9.17 25.597BU
SPECIALS6. EXTRA LENGTH:With standard ID, standard OD, and standard tolerances.To price, add the following percentages to the standardbushing’s price (add a separate percentage charge for eachspecial tolerance). Also add a prorated 55.00 setup charge.0002 ID tolerance range (up to 1" ID).0001 ID tolerance range (up to 1" ID).0001 OD tolerance range (up to 1" OD).0002 TIR concentricity (over 1/8" to 1" ID) 25% 75% 25% 25%Example: (6) H-16-10-.1250 ID 0/ .0001 CONC .0002To price, add 15% for up to 1/4" extra length, to the quantityprice for the longest length listed in the catalog, plus aprorated 55.00 setup charge.Example: (6) H-16-26-.1250List price for H-16-24List price for H-16-10 13.27Quantity price for H-16-10 ( 13.27 less 18%)Add-on for .0001 ID tolerance ( 75%)Add-on for .0002 concentricity ( 25%) 55.00 setup divided by 6 10.88 8.16 2.72 9.17 30.93 28.92Quantity price for H-16-24 ( 28.92 less 18%) 23.71Quantity price for H-16-24 plus 15% 55.00 setup divided by 6 27.27 9.17 36.449. NO COUNTERBORE ON LONGBUSHINGS:7. COMBINATION SPECIAL ID,OD, AND/OR LENGTH:With standard tolerances.Contact factory for special pricing on “No Counterbore”bushings, long bushings that would normally be counterbored, according to ANSI standards.10. OTHER ALTERATIONS:To price, compare price for the ID range, special OD, and/orspecial length. Add a prorated 55.00 setup charge to thehighest of all the prices.Example: (6) H-22-14-.1260List price for H-24-16, ID range (low)List price for H-20-16, ID range (high)List price for H-24-16, OD range (low)List price for H-24-16, Length (low) 11.48 12.17 11.48 11.48Quantity price for H-20-16 ( 12.17 less 18%) 55.00 setup divided by 6 9.98 9.17 19.158. SPECIAL TOLERANCES:With standard ID, standard OD, and standard length.For milled angles, ground flats, cross holes, chip breakers, oilgrooves, or special finishing, please contact factory.11. SPECIAL MATERIAL:Bushings made of the following heat-treated materials arereadily available as specials:52100 SteelA2 Tool SteelD2 Tool SteelM2 Tool Steel416 Stainless Steel440C Stainless Steel17-4PH Stainless SteelBushings made of the following non-heat-treated materialsare also readily available as specials:303 Stainless Steel660 BronzeAmpco 18 BronzeAmpco 21 BronzeOiliteBrassPlease contact factory for pricing.8BU(3/09)
PPRESS FITIDRANGELENGTHODIDAPPLICATIONS:ORDERING EXAMPLES:P-20-16-.1250P-20-16-.1772Standard USA bushing, inch IDStandard USA bushing, mm ID(.1772 4.50mm)P-20-16U-.1250Unground ODP-20-16-.1250 REAMER Reamer tolerance on IDP-20-16-.1250 NCBNo counterbore on long bushingsmarked with * (no counterbore isstandard on all other bushings)PC-20-16-.1250Carbide bushingPM-8-12-4.50Standard metric bushingPrices shown here apply to standard bushings only, eitherground or unground OD, for a standard drill size within thestated ID range. See back cover for decimal equivalents. Toprice non-standard sizes, including all reamer and tap-guidebushings, see page 7.STANDARD ID TOLERANCES:From #80 to 1/4" .0001/ .0004Over 1/4 to 3/4" .0001/ .0005Over 3/4 to 1-1/2" .0002/ .0006Over 1-1/2 to 2-3/4" .0003/ .0007From .35 to 3mm .002/ .008mmOver 3 to 6mm .004/ .012mmOver 6 to 10mm .005/ .014mmOver 10 to 18mm .006/ .017mmOver 18 to 30mm .007/ .020mmOver 30 to 50mm .009/ .025mmOver 50 to 80mm .010/ .029mmOver 80 to 120mm .012/ .034mm(G6 1578-.1575*1/2P-10-8.75-1.25mm (.166-.161 /4P-12-4(.201-.197 213-.208 -121.65-2.50mm*1P-13-16*1-3/8 P-13-22* Counterbored, leaving correct drill-bearing length and clearance(see page 6 for bearing length).0135-.0291#80-#70.35-.70mmPlease see our web catalog for pricing.This is the most-popular and least-expensive drill bushing. Pbushings are permanently pressed into the jig plate, usuallyflush with the top surface. They are generally used forsingle-step drilling or reaming operations when you do notexpect to replace bushings during the tooling’s lifetime. Pbushings can be mounted closer together than headedbushings, but offer less resistance to heavy axial loads.ANSIPRICELENGTH PART NO.1-5ODREAMER ID TOLERANCES:From #60 to 1/4" .0005/ .0008Over 1/4 to 1" .0006/ .0010Over 1" to 1-1/2" .0008/ .0012(3/07)From 1 to 3mm .006/ .012mmOver 3 to 6mm .010/ .018mmOver 6 to 10mm .013/ .022mmOver 10 to 18mm .016/ .027mmOver 18 to 30mm .020/ .033mm(F6 tolerance)QUANTITY DISCOUNTSQuantityDiscount 89BU
POD1/4.0980-.1406.2516-.2513#40-9/642.50-3.50mm (.265-.260 UNG).1250-.19355/161/8-#10.3141-.31383.20-4.90mm (.327-.322 UNG)13/32.1875-.2570.4078-.40753/16-F4.75-6.50mm (.421-.416 UNG)7/16.2340-.2900.4392-.4389A-L5.90-7.40mm (.453-.448 UNG).1875-.31601/23/16-O.5017-.50144.75-8.00mm (.520-.515 UNG)ANSIPART .50-8.75mm (.582-.577 UNG)5/8.3125-.4375.6267-.62645/16-7/167.90-11.00mm (.645-.640 UNG)Please see our web catalog for pricing.1935-.22803/8#10-#1.3766-.37634.90-5.80mm (.390-.385 13.50mm (.770-.765 m (.895-.890 UNG)LENGTHANSIPART -28P-56-34P-56-40Please see our web catalog for pricing.IDRANGEPRESS FITQUANTITY DISCOUNTSQuantity* Counterbored, leaving correct drill-bearing length and clearance(see page 6 for bearing length).10BUDiscount 8(3/07)
PPRESS FITODANSIPART .50-19.50mm (1.020-1.015 UNG).7656-.84381-1/849/64-27/321.
Drill bushings for gun-drilling machines, such as Eldorado, Drillmation, DeHoff, and Lahr. Gun drill bushings are similar to SF renewable bushings, but with the drill bear-ing at the bushing's head end. Depending on the gun-drilling machine, bushings are either one-piece or two-piece (a liner and an insert). Drill Workpiece Bushing Retainer .
4 Name the types of jig shown in fig. A Post jig B Channel jig C Solidjig D Plate jig 5 Name the part marked as 'X' in shown fig ? A Locating pin B Drill bush C Button clamp D Base plate 6 Which type of jig is shown infig. A Table jig B Sandwich jig C Post jig D Solid jig 7 What is the use of solid jig? A Small jobs B Heavy jobs
design model of the drill jig is created by using Solid Edge V19 software. Drill jig consist of following elements. 1) Jig plate: Jig plate is the major structural element of the drill jig. During drilling operation the work part is located on jig plate itself. 2) Locating
position of the jig into which the harden bushes were fitted known as bushing plate. If one hole is to be drilled, the drill jig is made to slide on the table to drilling machine. If the drill size is large enough to provide a high torque, either stops should be provided or the drill jig is clamped to the table of the drilling machine. A drill jig
Drill jig with swinging bush plate and latch cam closure. Simple leaf jig. Functions of a jig . The example above shows a drill jig designed to drill 4 holes equally spaced around the tapered hub of a hand-wheel at right angles to the hub diameter. Drilling jig (contd.) Indexing Jigs
through jig Flush mount by counterboring top of hole in jig plate Available with finish ground O.D. or unground for custom grinding Gun Drill Bushings Oil Groove Bushings ACmE Designation Type OG Used for drill lubrication or as a bearing Lubricant (or coolant) flows through grooves in bushing I.D. wall
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Channel jig: The channel jig is a simple type of jig having channel like cross section. The component is fitted within the channel is located and clamped by locating the knob. The tool is gu ided through the drill bush. It is shown in figure 3. Figure 3 Leaf Jig: It is also a sort of open type jig, in which the top plate is
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