Synchronous Idler Sprockets (HTD & Poly Chain GT2)

htd idler sprockets (ball bearing)

part # pitch / belt width # of grooves a b c i approx.
weight (lbs)
29-8m-50bb 8mm  / 50mm 29 2.859" 2 1/8" 3/4" 1/16" 3.5
29-8m-85bb 8mm / 85mm 29 2.859" 3 1/2" 3/4" 1/16" 5.0
27-14m-40bb 14mm / 40mm 27 4.627" 1 11/16" 1" 1/16" 4.1
27-14m-55bb 14mm  / 50mm 27 4.627" 2 3/8" 1" 1/16" 9
27-14m-85bb 14mm / 85mm 27 4.627" 3 9/16" 1 3/8" 1/16" 12
31-14m-115bb 14mm / 115mm 31 5.33" 4 13/16" 1 1/2" 1/16" 19

radial load capacity in lbs

based on 2500 hours service life at rpm shown

part # 100 RPM 500 RPM 1000 RPM 1200 RPM 1800 RPM
29-8m-50bb 2336 1366 1084 1020 891
29-8m-85bb 2336 1366 1084 1020 891
27-14m-40bb 2555 1494 1186 1116 975
27-14m-55bb 2555 1494 1186 1116 975
27-14m-85bb 6113 3575 2837 2670 2332
31-14m-115bb 6113 3575 2837 2670 2332

htd idler sprockets (needle bearing)

part # brewer
interchange
pitch /  belt width # of grooves a b c i approx. weight (lbs)
19-8m-30nb p19-8m-30f 8mm / 30mm 19 1.851" 1 3/8" 1" 1/16" 0.69
29-8m-50nb p29-8m-50f 8mm / 50mm 29 2.859" 2 1/2" 1" 1/16" 3.7
29-8m-85nb p29-8m-85f 8mm / 85mm 29 2.859" 3 1/2" 1" 1/16" 5.3
27-14m-40nb p27-14m-40f 14mm / 40mm 27 4.627" 1 11/16" 1" 1/16" 5
27-14m-55nb p27-14m-55f 14mm / 55mm 27 4.627" 2 3/8" 1" 1/16" 11
27-14m-85nb p27-14-85f 14mm / 85mm 27 4.627" 3 9/16" 1" 1/16" 14
31-14m-115nb p31-14m-115f 14mm / 115mm 31 5.33" 4 13/16" 1 1/2" 1/16" 22

radial load capacity in lbs

based on 2500 hours service life at rpm shown

part # 100 RPM 500 RPM 1000 RPM 1200 RPM 1800 RPM
19-8m-30nb 4483 2766 2247 2127 1883
29-8m-50nb 6266 3867 3141 2973 2633
29-8m-85nb 6266 3867 3141 2973 2633
27-14m-40nb 6266 3867 3141 2973 2633
27-14m-55nb 6266 3867 3141 2973 2633
27-14m-85nb 12249 7558 6139 5812 5147
31-14m-115nb 12249 7558 6139 5812 5140

htd idler sprockets (ball bearing)

part # gates
interchange
belt
width
(mm)
no.
of
teeth
o.d. b
ref
c d e
ref
f
threads
g
ref
h j app
weight
(lbs)
8m-32s-12-bb 12-idl-spk2 12 32 3.15" 1.68" 0.50" 0.85 1.56" 3/4"-16 0.94" 2.52" - 1.0
8m-32s-21-bb 21-idl-spk2 21 32 3.15" 1.68" 0.50 1.24 1.56" 3/4"-16 0.56" 2.75" - 1.2
8m-36s-36-bb 36-idl-spk2 36 36 3.55" 1.68" 0.75 1.86 1.63" 3/4"-16 - - - 2.0
8m-36s-62-bb 62-idl-spk2 62 36 3.55" 1.68" 0.75 2.91 1.69" 3/4"-16 0.69" 3.13" - 2.2
14m-30s-20-bb 20-idl-spk2 20 30 5.15" 1.68" 1.00 1.36 2.25" 1"-14 1.00" 4.38" - 9.0
14m-30s-37-bb 37-idl-spk2 37 30 5.15" 1.68" 1.00 2.06 2.25" 1"-14 0.25" 4.38" - 12.0
14m-34s-68-bb 68-idl-spk2 68 34 5.86" 1.68" 0.56 3.33 2.25" 1"-14 1.00" 4.38" 4.34" 15.6
14m-34s-90-bb 90-idl-spk2 90 34 5.86" 1.68" 0.31 4.20 2.25" 1"-14 1.00" 4.38" 4.34" 17.0

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