Understanding Your Precision Measurement Needs

Size: px

Start display at page:

Download "Understanding Your Precision Measurement Needs"

Elwin Maximilian Wilkinson
6 years ago
Views:

1 Understanding Your recision Measurement Needs Northern Gauge is distributed by : Newman ools nc. 185 ber d. Ottawa, Ontario, anada K2 17 el Fax

2 WH O OOK FO N ON HD GUGNG aw Material and the heat treatment stabilization process Gauge material and heat treatment plays a very important role in obtaining a dimensionally stable and long life gauge. We use an OHN ungsten quality oil hardened non shrinking steel or a 2Mnr5 steel (for small thread rings). he gauge material is duly carburized hardened and tempered. cryogenic treatment is carried out to increase the performance of the material. his cryogenic treatment is not a substitute for heat treatment, but rather an extension of the heating, quenching and tempering cycle. he process involves a slow controlled cooling, holding at cryogenic temperature for a specific hold time and then allowing to return to room temperature slowly. his process transforms all retained austenite to martensite. he end result is a very stable material which is 1% martensite and very hard Without cryogenic treatment these steels may contain significant amounts of retained austenite which is a weak, soft, easily abraded micro constituent of steel. recision hand lapping apping is the finishing process that removes small amounts of material from the gauge surface to bring it within its final tolerance limits. t is the final procedure in gauge manufacture and of paramount importance. his process of feeling a millionthʼs of inch is a true art. ll Northern Gauge, gauges are made to the high end of the tolerance (unless otherwise specified) to ensure longer gauge life. emperature control and raceability ll our gauges go through final inspection in a temperature controlled (2 degrees +/-.5 degree ) metrology lab. ll master gauges are fully traceable to a registered national or international standard. Our long form certificate of inspection provides as much detail as possible showing evidence of dimensional compliance. We understand quality system documentation as well as the value associated with it; and as a result we provide long form certificates F with every gauge we sell regardless of price. olid ring design t Northern Gauge we provide a solid ring design because we feel in many ways it is superior to GD (merican Gauge Design) for the following reasons: Dimensionally more accurate. tayʼs round for its entire life. No setting plug needed for calibration or inspection. More care-free, if dropped it doesnʼt have to be re-calibrated. With the price of GD setting plugs it makeʼs good economical sense to go with a solid ring and perform your periodic calibration based on usage. Our solid rings are economically priced in comparison to GD style. Once you try using our solid rings youʼll never go back to GD. oated and Uncoated threaded components/parts f the threaded components like nuts and bolts have to be coated then it is necessary to check them prior to coating. he gauge can be suitably designed to check the before coating size depending upon the coating thickness. Normally it is only the go limit gauge which is necessary to be used for checking before coating. he component near to nogo limit automatically falls within the tolerance limit after coating. Normally coating thickness is.1. Here the thickness is considered as either an increase or decrease in the pitch diameter. f the coating thickness is considered normal to the thread flanks, the variation in diameter is four times the thickness, for threads with 6 degree angle and slightly less for 55 degree.

3 Maintenance & reservation of Gauges Gauge need to be thoroughly cleaned before and after use with either lcohol or suitable solvent which do not contain water or leave an oil buildup. etroleum jelly or tarrett M1 oil should be used when gauges are not in use. Do not use WD4 as it leaves a greasy buildup; really bad on gauge blocks. he component must also be clean and free of metal particles. Do not use thread gauge forcefully; like a tap or die. Do not allow the gauge to be dropped on the shop floor; these gauges are brittle and may break. lease note that the limit gauge is a precision tool and should be handled carefully. Gauge ife t is very difficult to predict gauge life. Gauges used against cast iron, aluminum and stainless/duplex steels have faster wear due to lapping effect of these material. However, gauge life can certainly be improved by proper use and care of the gauges as defined above. calibration interval of one year to start and adjust after a history is established. rouble hooting working gauge answers/enters the components but the inspection gauge doesnʼt answer: his is normally due to the size of the inspection go gauge slightly above the working go gauge. n such case the working gauge dimensions may be worn out. For future use, interchange the working and inspection gauges; and decrease your calibration interval. Go gauge doesnʼt enter but the nogo answers freely; his occurs due to major diameter of nut i.e internal thread or minor diameter of bolt i.e. external thread is not maintained properly. he major diameter of the go plug and minor diameter of the go ring gauge is sharp and hence obstructs with the corresponding diameter on the component. Hence the operator takes more material without correcting the tool sharpness. he nogo major diameter/minor diameter being more truncated than the go gauge, enters the component. he go gauge controls all the thread parameters and will not enter if any of these are incorrect. f there is no control on the actual point of error, the effective diameter of the component becomes oversized and the nogo gauge enters.

OK HD WOKNG UG GUG M - NH ll Northern Gauge thread plug gauges are manufactured in accordance with M/N B1.2 or B1.16M. aperlock style is standard for plug gauges up to 1.5 inches. bove 1.

4 OK HD WOKNG UG GUG M - NH ll Northern Gauge thread plug gauges are manufactured in accordance with M/N B1.2 or B1.16M. aperlock style is standard for plug gauges up to 1.5 inches. bove 1.5 inches a rilock design is used (call or for rilock thread plug gauge pricing). itanium Nitriding also available as a special quotation VB HD UG GUG VB DD 3% O BOV NOMN HD NH () DOUB NDD Z UN UNF UNF $dn # 8 # # # # # # # # # # / /4 32 5/ / / /8 32 7/ / / /2 28 9/ / / / / / /4 2 13/16 2 7/ /8 2 15/ , / / / / / / / / / / / /2 18 F O U N 2 6

5 OK HD WOKNG UG GUG M - MM ll Northern Gauge thread plug gauges are manufactured in accordance with M/N B1.2 or B1.16M. aperlock style is standard for plug gauges up to 1.5 inches. bove 1.5 inches a rilock design is used. NOMN H H DOUB NDD Z O FN $DN M M M2.4 M M M3.5 M3.5.6 M4.7 M M5.8 F O M6 1. M7 1. M U M M M N M12 1. M ,1. 2 M M M M M M M M M M *** VB HD UG GUG VB DDD 3% O BOV

OD Y HD NG GUG M NH ll Northern Gauge thread ring gauges are manufactured in accordance with M/N B1.2 or B1.16M. olid style ring gauges are dimensionally true in all aspects.

6 OD Y HD NG GUG M NH ll Northern Gauge thread ring gauges are manufactured in accordance with M/N B1.2 or B1.16M. olid style ring gauges are dimensionally true in all aspects. NOMN HD NH () GO O NOGO Z UN UNF UNF $dn # 8 # # # # # # # # # # / /4 32 5/ /16 32 F 3/ O 3/8 32 7/ / / /2 28 U 9/ / / /8 24 N 11/ / /4 2 13/ / /8 2 15/ , / / / / / / / / / / / /2 18

7 OD Y HD NG GUG M MM ll Northern Gauge thread ring gauges are manufactured in accordance with M/N B1.2 or B1.16M. olid style ring gauges are dimensionally true in all aspects. NOMN H H 6G MMB Z O FN GO O NOGO $dn M M M2.4 M M M3.5 M3.5.6 M4.7 M M5.8 M6 1. M7 1. M M M M M ,1. M M M M M M M M M M F O U N 2 6

8 D HD GUG WOKNG ll Northern Gauge pipe thread gauges are manufactured in accordance with M/N B1.2.1 or B1.16M. HD GUG - N ND NF Z N N NF NF NF NF UG NG UG NG NG N O 3 NG 1/ /8-27 1/4-18 3/8-18 1/2-14 FO 3/ UN / / / ******* UG NUD HND ND ONG FOM FON NO X O******* *** ll prices in $dn *** HD GUG - N Z 1 2 N 1 3 N NG NG UG UG B B NG B B UG 6 6 1/ /8-27 1/4-18 3/8-18 1/2-14 3/ / / FO UN / ******* UG NUD HND ND ONG FOM FON NO X O******* *** ll prices in $dn ***

5B NG, UBNG ND N HD GUGNG - WOKNG ll Northern Gauge 5B thread gauges are manufactured in accordance with 5B and 5B 1latest edition requirements. OUND HD NG GUG Z WOKNG UG $cdn WOKNG NG $cdn 4.

9 5B NG, UBNG ND N HD GUGNG - WOKNG ll Northern Gauge 5B thread gauges are manufactured in accordance with 5B and 5B 1latest edition requirements. OUND HD NG GUG Z WOKNG UG $cdn WOKNG NG $cdn 4.1/ / / FO UN 26 asing Gauges are.625 included taper per inch (3/4..F.) UBNG U ND NU GUG Z WOKNG UG $cdn WOKNG NG $cdn 1.5 X X X 1 FO 1.9 X 1 2.3/8 X 1 NU 2.3/8 X 8 U 2.7/8 X 1 NU UN /8 X 8 U 3.1/2 X 1 NU 3.1/2 X 8 U 4 X 8 NU/U 4.1/2 X 8 NU/U Non-Upset and xternal Upset are.625 included taper per inch (3/4..F.)

Z 1/8 X 27 _ X 18 3/8 X 18 _ X 14 _ X 14 1 X 11.5 1.1/4 X 11.5 1.1/2 X 11.5 2 X 11.5 2.1/2 X 8 3 X 8 3.1/2 X 8 4 X 8 5 X 8 6 X 8 N GUG WOKNG UG $cdn WOKNG NG $cdn FO UN 26 ine ipe Gauges are.

10 Z 1/8 X 27 _ X 18 3/8 X 18 _ X 14 _ X 14 1 X /4 X /2 X X /2 X 8 3 X 8 3.1/2 X 8 4 X 8 5 X 8 6 X 8 N GUG WOKNG UG $cdn WOKNG NG $cdn FO UN 26 ine ipe Gauges are.625 included taper per inch (3/4..F.) Northern Gauge also offers the following Oil atch related thread gauges: 6 / O 1423 Valve-removal lug hread Gauges Back ressure Valve 9 Degree hreads Gauges 11B ucker ods pecification 7 otary Drill tem lements harp Vee Non-Upset asing and ubing hread Gauges pecialty Gauging. We can custom design a gauge for your product. utomated nspection systems. ylindrical Gauging lain and rogressive plug and ring D/OD to 7 inches. lass XX, X, Y & Z available.

GGMKʼ ON H bove o & incld. lass XX lass X lass Y lass Z.1.254mm.825 2.95mm 1.51 38.35mm 2.51 63.75mm 4.51 114.5mm 6.51 16.35mm.825 2.95mm 1.51 38.35 mm 2.51 63.75mm 4.51 114.55mm 6.51 165.35mm 9.

11 GGMKʼ ON H bove o & incld. lass XX lass X lass Y lass Z.1.254mm mm mm mm mm mm mm mm mm mm mm mm.2.5µm.3.75µm.4 1.µm µm µm.8 2.µm.4 1.µm.6 1.5µm.8 2.µm.1 2.5µm µm.16 4.µm.4 1.µm.6 1.5µm.8 2.µm.1 2.5µm µm.16 4.µm.1 2.5µm.12 3.µm.16 4.µm.2 5.µm µm.32 8.µm How to Determine and elect the roper olerance for Your Gauging pplication he normal rule of practice requires 1% of product tolerance to be divided between the GO and NOGO gauges. For plug gauges, a plus tolerance is applied to the GO member and a minus tolerance to the NOGO member. ing gauges receive reverse tolerance direction so that the GO member is minus an the NOGO is plus tolerance. pplying this practice results in gauge tolerance always being included in the part tolerance by up to 1%. his results in the possibility that 1% of good product could fail inspection that no bad product would ever pass. roper are and Usage of Gauges arts dimensions to be gauged should be free of burrs to prevent gauging interference. Gauges should be turned or pushed slowly and gently. Forcing gauges will result in faulty gauging and possibility of damaging both the gauge and the part.

12 lug and ing Gauge lasses for roduct olerances he below chart of product tolerances for plain plug and ring gauges may be used as a guide for recommended gauge tolerance. his assumes a given product tolerance. Wear allowances and other similar concerns should be included when gauge specifications are being defined. hese are left for the user to determine. lain plug gauges normally use a plug tolerance to be considered go and a minus tolerance constitutes a nogo status. ing gauges normally use a minus tolerance to be considered go and a plus tolerance for nogo. hese descriptions are fitting with normal practice that allows 1% of the product tolerance to be equally divided between go and nogo conditions. roduct lass of Gauge for ize ange olerances XX XX.5 XX XX.6 XX XX XX.7 X XX XX.8 X XX XX XX.9 X XX XX XX.1 X X XX XX.12 Y X XX XX.14 Y X X XX.16 Y Y X X.18 Z Y X X.2 Y X X.22 Z Y X.24 Y X.26 Y Y.28 Y Y.3 Z X.32 Y.34 Y.36 Z nap Gauging variety of snap gauging is available depending on customer and product size, shape and tolerance.

13 aliper and Height Gauge hecker he instrument is sufficiently rigid and consists of stepped slip gauges permanently fixed in inner casing. he aliper hecker is ideal for in-house periodic calibration of measuring instruments i.e. Vernier/Dial/Digital alipers & Height Gauges echnical pecification ange Height xternal nternal Measurement Measurement Measurement -3 mm 37 mm 3 mm 3 mm -6 mm 67 mm 6 mm 6 mm -1 mm 17 mm 1 mm 1 mm Note: lso available in -12 inch and -24 inch. Micrometer hecking et (etting ods) We offer etting ods for the calibration of Micrometers from 25-1mm range. he etting rods are manufactured in high quality steel. he standard 31 piece etting ods are sufficient for calibration of 25 to 1 mm range. Depth Micrometer hecker his instrument is specially designed for the calibration of Depth Micrometers. Gauge Blocks are built in the rigid frame to provide measuring in 25 mm or 1 inch steps in accordance with the travel range of the micrometer head. n anvil of 25 mm or 1 is supplied to provide a reference point for calibration at desired step within the measuring range of the hecker. he instrument is an ideal master gauge for calibration of depth micrometers. ange -15 mm and -3 mm or -6 inch and -12 inch, accuracy +/- (1+/15µm). recision lip Gauge Blocks Gauge lip Block in ungsten, teel and Zirconia eramic from the UK in accordance with DN 861 and B 888 or any gauge standard you require. Northern Gauge only carries on the best lip Gauge Blocks. hese blocks are manufactured from specially selected grades of arbide with hardness values of 15 Vickers. igid attention is paid throughout the entire manufacturing process for flatness and parallelism. very slip gauge block is rigorously checked and calibrated in an accredited laboratory. ngle Gauge Blocks recision angle blocks can be used to obtain any angle between and 36 degrees in steps of 6 seconds.

14 Why ungsten arbide Gauges re referred ungsten arbide lip Gauge Blocks should outlast steel by at least ten times and in certain conditions even 1 times. he use of ungsten arbide for lip Gauge Blocks has increased tremendously in recent years and is now rapidly supplanting tool steel in this application. Dimensional tability ungsten arbide is a stable material, which gives an obvious and accepted advantage over more conventional materials. Dimensional tability is of prime importance. bility to Wring ungsten arbide is a very dense material. his allows the production of high quality geometrically accurate surface giving superior wring quality to the lip Gauge Blocks. esistance to Wear ungsten arbide is highly resistant to wear. he lip Gauge Blocks will retain its accuracy for an extremely long time. esistance to orrosion his is one of the major advantages with ungsten arbide Blocks, which makes it ideal for continuous handling. conomy he economics of using ungsten arbide Blocks is immediately apparent when we consider its longer life and also the substantial reduction on re-calibration costs. he durability of these gauges gives an ultimate return on the investment.

15 alibration aboratory rice ist (rices effective January 1, 25) Dimensional alibration he measurement capability of our laboratory and the traceability of our measurements are traceable to N and N in Ottawa; abmasterʼs exclusive Digital interferometer based sensor, accurately measures length by comparing the measurement probe position to the absolute wavelength of a laser light source. emperature ontrol Northern Gauge contracted the anadian National esearch ouncil (N) in Ottawa to design our temperature control system. Our temperature control is state of the art and proprietary to the N in Ottawa (we signed a non-disclosure agreement). Without adequate temperature control, accurate measurement is not achieved. We understand metrology, accurate measurement and measurement error/uncertainty. his is why we have spent great expense in temperature control of +/-.2 degrees. We are working on improving this control to.1 degrees. Basically the more accurate your temperature control the lower your measurement uncertainty is. ratt & Whitney BM UNV Northern Gauge uses a ratt & Whitney BM UNV with stated repeatability of 1.6 mircoinches +/_ 2 standard deviations (based on environmental stable at 2 degrees +/-.2 degree and humidity between 15% - 25% ) Measurement ange - internal.2 to 14 and external to 13 nspection and alibration Gauges should be periodically inspected and calibrated to ensure accuracy. Go members tend to wear quicker with normal use. NOGO gauges will wear on the ends. Frequency of inspection and calibration should be dependent on such factors as the amount of usage, part and gauge material, tolerance, and quality procedure.

16 alipers 6-8 inch 12 inch 24 inch 6 inch Micrometers nside and Outside 6-8 inch 12 inch 18 inch 24 inch alipers - 8 inch alipers 12 inch Micrometer etting tandards 12 inch inch inch Depth Micrometers Dial ndicators 81 piece of gauge blocks F O U N 2 6 hread lug Gauges 6 1 inch 1 2 inch 2 4 inch 4 6 inch 6-1 inch hread ing Gauge 6 1 inch 1 2 inch 2 4 inch 4 6 inch 6-1 inch alipers -24 inch alipers 48 inch hread Wires - et of 3 Wires ength tandards 12 inch 18 inch 36 inch rice er nd F O U N 2 6 his includes cleaning, removing any gross scratches and calibration lain ylindrical lug -1 inch 1 2 inch 2 3 inch 3 4 inch 4 5 inch 5 6 inch 6 7 inch 7 8 inch 8 9 inch 9 1 inch 1 11 inch inch inch rice er nd FO UN 26 lain ylindrical ing -1 inch 1 2 inch 2 3 inch 3 4 inch 4 5 inch 5 6 inch 6 7 inch 7 8 inch 8 9 inch 9 1 inch 1 11 inch inch inch rice er ing FO UN 26

Limited time offer. For Mitutoyo s Gage Block 70th Anniversary, we are offering select gage block sets at a significant price reduction.

Limited time offer. For Mitutoyo s Gage Block 70th Anniversary, we are offering select gage block sets at a significant price reduction. E XC LU S I V E A N N I V E R S A RY P R O M OT I O N ed time offer. For Mitutoyo s Gage Block 70th Anniversary, we are offering select gage block sets at a significant price reduction. In addition, each