FLENDER Standard Couplings Torsionally Rigid Gear Couplings — ZAPEX ZN Series © Siemens AG 2015 Customized hub design for ZAPEX ZN Series ■ Selection and ordering data ZAPEX couplings can be provided with customized S-dimen- sions and hub lengths. SF1 and SF2 can be chosen different on customer request, how- ever the minimal and maximum values of the following table have to be observed. Within these limits the measurements SF1 and SF2 may be chosen freely. The entire dimension S results from the sum of the individual measurements SF1 and SF2. SF1 and SF2 are the measure- ments from the interstice of the coupling ring flange up to the be- ginning of the respective hub.
As standard SF1 and SF2 are identical to each other and the entire S-dimension arises in ac- cordance with them. The distance VA of the coupling teeth, the permitted bore diam- eter and the hub diameter remain unchanged. By stating the hub S-dimension and both hub lengths the coupling is completely described. Interstice Part 2 Part 1 5 S = SF1 + SF2 SF2 max. NL Special G_MD10_EN_00183 NL Standard SF2 min. Part 1 Interstice Part 2 Geometric data Article number Maximum dimension SF1 or SF2 The article number of the respective ZAPEX coupling type must be supplemented with "-Z" and order codes for no standard SF- dimensions (order code "Y38" for part 1 and "Y39" for part 2).
For no standard hub lengths the order codes "Y40" to "Y49" must be specified (see the table below) . mm 22 23.5 32 36.5 43.5 51 59 64.5 72 85 92 100 max. Ordering example: ZAPEX coupling ZNN 130, variant A Hub left: bore D1 = 70H7 mm, keyway to DIN 6885-1 P9 and set screw; NL1 = 110 mm; SF1 = 10 mm Hub right: bore D2 = 75H7 mm, keyway to DIN 6885-1 P9 and set screw; NL2 = 75 mm; SF2 = 25 mm Article No.: 2LC0330-2AA99-0AA0-Z L1G M1H Y38 Y39 Y41 Y46 Plain text to Y38 : SF1 = 10 mm Plain text to Y39 : SF2 = 25 mm Plain text to Y46 : NL1 = 110 mm Plain text to Y41 : NL2 = 75 mm The minimal hub lengths are not to fall below the standard hub lengths.
If there‘s no other possibility, for hub lengths smaller than stan- dard hub lengths the order codes "Y50" for part 1 and "Y51" for part 2 must be stated in plain text. Order code for hub prolongations (Y4.); Std-NL = Standard hub length Part 1 Order code Y40 (specification of hub length in plain text) Y42 (specification of hub length in plain text) Y44 (specification of hub length in plain text) Y46 (specification of hub length in plain text) Y48 (specification of hub length in plain text) Part 2 min. > Std-NL > 1.25 · Std-NL > 1.5 · Std-NL > 1.75 · Std-NL > 2 · Std-NL 5/12 Siemens MD 10.1 · 2015 SF1 min. NL Standard NL Special S = SF1 + SF2 SF1 max.
Size Standard hub lenght Minimal dimension NL SF1 or SF2 Standard mm min. mm 83 43 1.5 107 50 1.5 130 62 1.5 156 76 2.5 181 90 2.5 211 105 3 250 120 3 274 135 4 307 150 4 333 175 4 364 190 4 424 220 5 Selected (special) hub length min. max. > Std-NL ≤1.25 · Std-NL > 1.25 · Std-NL ≤1.5 · Std-NL > 1.5 · Std-NL ≤1.75 · Std-NL > 1.75 · Std-NL ≤2 · Std-NL > 2 · Std-NL Order code max. ≤1.25 · Std-NL Y41 (specification of hub length in plain text) ≤1.5 · Std-NL Y43 (specification of hub length in plain text) ≤1.75 · Std-NL Y45 (specification of hub length in plain text) ≤2 · Std-NL Y47 (specification of hub length in plain text) Y49 (specification of hub length in plain text)