SMPTE ST 160M-1995 Motion-Picture Equipment (8-mm Type S) Projection Reels 100- to 312-mm Diameter.pdf

1、1 ScopeThis standard specifies the dimensions of 8-mm typeS motion-picture projection reels of 100- to 312-mm(3.94- to 12.28-in) diameter with nominal film capaci-ties up to 360 m (1200 ft).2 Dimensions 2.1 The dimensions shall be as given in thefigures and tables.2.2 The dimensions apply regardless

2、 of thematerial used for construction (see note 1).2.3 Dimension H applies from the surface of thehub to the periphery of the flanges.2.4 The minimum dimension K represents thediameter of the central portion of the reelcentered on the spindle hole axis, over whichthe effective central thickness, J,

3、of the reel isintended to apply (see 2.5).2.5 Dimension J applies only within the maxi-mum K diameter area and represents the dis-tance or effective distance between therespective reference planes of rotation for eachflange.2.6 Selection of a value for dimension P isdependent upon the thickness of t

4、he materialused for the flanges. According to the flangematerial thickness: 1) the K diameter area maybe depressed (with P greater than zero); or 2)the outside surfaces of the flanges may be flatfrom the spindle hole area to the periphery (withP equal to zero); or 3) in the case of flangesmade of ve

5、ry thin material, the K diameter areamay be raised rather than recessed (effectively,P less than zero).2.6.1 The P value for one flange should not differfrom the corresponding P value for the otherflange by more than 0.5 mm (0.02 in).2.6.2 Any chosen flange thickness shall be main-tained within 0.13

6、 mm (0.005 in) from 5.0 mm(0.20 in) of the hub to within 5.0 mm of theperiphery of the reel flange for reel size 10, and10.0 mm (0.39 in) from the hub to within 10.0 mmof the periphery for reel size 13 and larger.Intentional special configurations, art work,depressions, or cutouts are excluded from

7、thistolerance limitation.2.7 If film attachment is provided by a slot in thereel hub, a minimum cutout in the hub is requiredfor easy access to the film end, and to providefor insertion of a film-retention plug or clip forautomatic rewind equipment. The area shown infigure 1 represents one type of c

8、utout whichmight be used. The cutout area should be in bothflanges so that a retaining clip of width J couldbe accommodated. The minimum cutout is out-lined within the area and defined by dimensionsR2, S, and T (dimension S is perpendicular todimension T). However, the manufacturer mayprovide an inc

9、orporated means of film retentionin the design of the reel by use of a specialretention plug or clip or other suitable means offilm attachment. If a plug or clip is used, it shallnot protrude beyond dimension J for reel-to-reeloperation. The cutout area is not required whenthis is done; however, its

10、 supplemental inclusionis recommended when feasible (see note 2 forfilm attachment details).CAUTION NOTICE: This Standard may be revised or withdrawn at any time. The procedures of the Standard Developer require that action be taken to reaffirm, revise,or withdraw this standard no later than five ye

11、ars from the date of publication. Purchasers of standards may receive current information on all standards by calling orwriting the Standard Developer. Printed in USA.ApprovedSeptember 12, 1995Copyright 1995 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS595 W. Hartsdale Ave., White Plains

12、, NY 10607(914) 761-1100for Motion-Picture Equipment (8-mm Type S) Projection Reels 100- to 312-mm Diameter Revision ofANSI/SMPTE 160M-1990ANSI/SMPTE 160M-1995SMPTE STANDARDPage 1 of 6 pagesREAFFIRMED 20032.8 Dimension PMfor each flange is measuredat the periphery of the flange and is the greatestdi

13、stance measured outwardly from the flangereference plane of rotation when the reel isrotated on a test spindle and held against thereference K minimum zone surface (see figure2.)2.9 Dimension PEfor each flange applies any-wherebetween the K minimum zone and thepoint on the outside flange surface opp

14、osite thejunction of the hub periphery and the flange, andis measured to the same reference plane ofrotation used in measuring PM. An angularenvelope is defined by the conical surfaces join-ing the PM(max) loci with the particular PE(max)loci on the outside surfaces of the flangesdirectly opposite t

15、he junction of the hub peripheryand the flanges. All other points on the flanges(including rivets or other fastening devices, vari-ations in flange thickness, flatness, and lateralrunout) shall fall within the angular volume-of-rotation envelope. 2.10 The runout of the hub, dimension E, isspecified

16、by dimension U referenced from theaxis through the center of the spindle hole,dimension C. A similar allowance is provided forthe concentricity of the spindle hole and theflanges in the maximum volume-of-rotation dia-gram by having dimension V exceed dimensionM maximum by 0.5 mm (0.02 in) for reel s

17、izes upto and including No. 16, and by 0.8 mm (0.03 in)for larger reel sizes.Figure 1 Reel dimensionsANSI/SMPTE 160M-1995Page 2 of 6 pagesReel sizenumber1)Nominal reel capacityDimensions Millimeters Inchesmf10 30 100 M 100.00 1.03.940 0.04E46.0 max 1.81 max32.0 min 1.26 minV 100.5 3.96PM2)1.9 max 0.

18、07 max13 60 200 M 128.00 1.05.040 0.04E50.8 max 2.00 max45.0 min 1.77 minV 128.5 5.06PM2.0 max 0.08 max16 90 300 M 159.00 1.06.260 0.04E 62.0 1.5 2.44 0.06V 159.5 6.28PM2.3 max 0.09 max18 120 400 M 180.00 2.07.090 0.08E 62.0 1.5 2.44 0.06V 180.8 7.12PM2.3 max 0.09 max21 180 600 M 209.00 2.08.230 0.0

19、8E 62.0 1.5 2.44 0.06V 209.8 8.26PM2.6 max 0.10 max24 180 600 M 237.00 2.09.330 0.08E 124.0 2.0 4.88 0.08V 237.8 9.36PM2.6 max 0.10 max253) 240 800 M 252.00 2.09.920 0.08E 80.0 1.5 3.15 0.06V 252.8 9.95PM2.6 max 0.10 max27 240 800 M 268.00 2.010.550 0.08E 124.0 2.0 4.88 0.08V 268.8 10.58PM2.8 max 0.

20、11 max29 300 1000 M 292.00 2.011.500 0.08E 124.0 2.0 4.88 0.08V 292.8 11.53PM3.0 max 0.12 max31 360 1200 M 312.00 2.012.280 0.08E 124.0 2.0 4.88 0.08V 312.8 12.31PM3.0 max 0.12 maxTable 1 Dimensions applicable to specific reel sizesANSI/SMPTE 160M-1995Page 3 of 6 pagesTable 2 Dimensions common to al

21、l reel sizesFigure 2 Maximum volume of rotationDimensions Millimeters InchesB 1.5+ 0.300.06+ 0.010C 12.75+ 0.1500.502+ 0.0060D 20.50+ 0.5000.807+ 0.0200H 8.4+ 1.500.33+ 0.060J 11.40 1.20.450 0.05K 25.5 min 1.00 minP See 2.6 and 2.6.1PE1)1.5 max 0.06 maxR 1/2 dimension BR11/2 dimension BR21.5 max 0.0

22、6 maxS 12.0 min 0.47 minT 6. min 0.24 minU 08 max 0.03 max(SEE NOTE 3)ANSI/SMPTE 160M-1995Page 4 of 6 pagesNOTES1 If the reel hub is made from plastic or other dimensionallyunstable material, the spindle hole diameter, C, should beadjusted so that at least the minimum dimension, 12.75 mm(0.502 in),

23、is maintained through the normal use range oftemperature and relative humidity.2 Means should be provided for securing the end of the filmto the reel. Such provision should accept the full width of thefilm and freely release the film at the end of the run, exceptwhen used on automatic rewind equipme

24、nt. (If film attach-ment is provided by a slot in the hub, see 2.7.)3 A datum reference plane of rotation is defined for eachflange of a reel by a plane coincident with the surface of aflat 25.00-mm (0.984-in) diameter support which is centeredon the spindle hole datum axis of the flanges. The refer

25、encesurface makes contact with the reel in the minimum Kdiameter area. The datum axis, which is perpendicular tothe datum reference plane of rotation, does not necessarilycoincide with the axis from the center of the spindle holes(see figure 2).4 The flanges of the reel should have three radial driv

26、ingslots placed at 120 2 and conforming to dimensions Band D. The drive slots of both flanges are aligned. If properlyaligned, the reel will fit on a test spindle (gauge) of 12.7-mm(0.50-in) diameter with a radial spindle drive key having anaxial length from the spindle shoulder greater than width J

27、of the reel, a thickness of 1.47 mm (0.058 in); and a height,measured as a radius from the spindle axis, of 9.1 mm (0.36in).5 It is recommended that No. 10 reels be designed with onesolid flange with the exception of the hub area. The solidflange of the reel shall be opposite the film attachmentopen

28、ing.Annex A (informative)Additional dataA.1 Three drive slots are specified for the spindle hole ofeach flange to facilitate easy loading of the reel on the drivespindle, even though only one is normally used to drive thereel. However, spindles may have two or three drive keys.A.2 A test spindle sho

29、ulder of 25.00-mm (0.984-in) diame-ter is required for the measurement of dimension P. Loosefit between a projector spindle and reel spindle hole cancontribute to flange excursion not measured when determin-ing dimension P. This can be minimized if a 25.5-mm (1.00-in) shoulder also is incorporated o

30、n the projector spindleand a device for locking the K diameter area of the reelagainst the support is provided. In any case, it is expectedthat projector manufacturers will incorporate a spindleshoulder of at least 16.0-mm (0.63-in) diameter on theirequipment.A.3 Take-up reels, which are uniquely a

31、part of the manu-facturers projection equipment, may deviate from the pro-visions of this standard. As an example, it may be desirableto taper the flanges from the hub to the periphery or toprovide for special film attachment mechanisms.A.4 The usual winding of film on a reel with a solid flangeis s

32、uch that the film perforations are closest to the threadingslot (i.e., opposite the solid flange).A.5 The spindle hole may be formed by a sleeve or theremay be an air space between the spindle holes in theflanges, depending upon the type of construction. Becauseof this, the means of retaining the re

33、el on the projectorspindle should be designed to act against the full K dimen-sion of the reel adjacent to the spindle hole.A.6 The variety of needs for motion-picture films hasresulted in products with a wide range of thicknesses. Be-cause of this trend, the designation of reel sizes by a nominalca

34、pacity has lost significance and size designation by flangediameter has been introduced. However, to provide the filmcapacity information needed, tables A.1 and A.2 on usable filmlengths have been prepared for the standard size reels. Inderiving these values, three basic assumptions were made:1) The

35、 thickness value (t) assumes the inclusion of anymagnetic coating and a winding allowance (space betweenfilm layers) as well as film thickness. It should be noted thattightly wound uncoated film requires a winding allowance of0.0025 mm (0.00010 in), while loosely wound film requiresan allowance of t

36、hree or more times this value.2) The capacities shown are those which can be contained ona minimum capacity reel within the tolerances provided (ex-cept for the size 10 and 13 maximum values included). Thiswas achieved by using the minimum allowable flange diameterand the maximum allowable hub diame

37、ter in the calculations.3) Some protection from spilling over of the outer laps of filmis needed. Therefore, to leave a space between the film andthe periphery of the flange, an arbitrary value along theradius was chosen to derive the maximum film diameter: 3.5mm (0.14 in) for size 10 reels; 5.0 mm

38、(0.20 in) for size 13,16, and 18 reels; and 6.5 mm (0.26 in) for larger reels.A.7 Caution must be exercised when film is stored on reelsintended for archival storage. It is strongly recommendedthat the reels used not be finished with paints or coatingsthat have a tendency to evaporate over a long pe

39、riod of timeinasmuch as this will affect the stored material.ANSI/SMPTE 160M-1995Page 5 of 6 pagesReelsizeFlange diameterHubdiameterEmaxMaximum filmcoil DFilm thickness (t) in millimeterscm mm mm mm 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.1810 min 99.0 46.0 92.0 55.4 49.9 45.3 41.5 38.4 35.6

40、33.2 31.2 29.3 27.710max100.0 32.0 93.0 66.5 59.9 54.4 49.9 46.1 42.8 39.9 37.4 35.2 33.313 min 127.0 50.8 117.0 96.9 87.2 79.3 72.7 67.1 62.3 58.2 54.5 51.3 48.513max128.0 45.0 118.0 103.8 93.5 85.0 77.9 71.9 66.8 62.3 58.4 55.0 51.916 158.0 63.5 148.0 156.0 140.4 127.6 117.0 108.0 100.3 93.6 87.7

41、82.6 78.018 178.0 63.5 168.0 211.1 190.0 172.7 158.3 146.2 135.7 126.7 118.8 111.8 105.621 207.0 63.5 194.0 293.2 263.9 239.9 219.9 203.0 188.5 175.9 165.0 155.2 146.624 235.0 126.0 222.0 291.5 262.4 238.5 218.7 201.8 187.4 174.9 164.0 154.3 145.825 250.0 81.5 237.0 432.2 389.0 353.6 324.2 299.2 277

42、.8 259.3 243.1 228.8 216.127 266.0 126.0 253.0 420.0 378.0 343.7 315.0 290.8 270.0 252.0 263.3 222.4 210.029 290.0 126.0 277.0 531.0 477.9 434.5 398.3 367.6 341.4 318.6 298.7 281.1 265.531 310.0 126.0 297.0 631.2 568.1 516.5 473.4 437.0 405.8 378.7 355.1 334.2 315.6Table A.1 Film capacities of reels

43、 in meters (L)1)ReelSizeFilm thickness in inchescm 0.0035 0.0040 0.0043 0.0047 0.0051 0.0055 0.0059 0.0063 0.0067 0.007110 min 182 164 149 136 126 117 109 102 96 9110 max 218 197 179 164 152 140 131 123 116 10913 min 318 286 260 239 220 204 191 179 168 15913 max 341 307 279 256 236 219 204 192 180 1

44、7016 512 461 419 384 354 329 307 288 271 25618 693 623 567 519 480 445 416 390 367 34721 962 866 787 721 666 618 577 541 509 48124 956 861 783 718 662 615 574 538 506 47825 1418 1276 1160 1064 982 911 851 798 751 70927 1378 1240 1128 1034 954 886 827 775 730 68929 1742 1568 1426 1307 1206 1120 1045 980 922 87131 2071 1864 1695 1553 1434 1331 1242 1165 1096 1035Table A.2 Film capacities of reels in feetANSI/SMPTE 160M-1995Page 6 of 6 pages