SYNCHRONOUS PULLEY
Note when checking form and order pulley:
1. Belt and pulley of our company can be attachment or replacement of imported belt and pulley. 2. Please supply drawing when you order. We can also draw for clients as their supplied specification, hole, key way and width. 3. The tolerance of outside diameter, end bounce 7 wrap direction of pulley should conform to Form1,form 2 & form3. 4. Width of different specification of timing belt and pulley must conform to form4. 5. Outside diameter of pulleys and size should be as forms regulation. 6. We can also produce pulleys even sizes are not in the form. 7. The material of pulley mainly composed of carbon steel, if possible aluminum alloy nylon can also be employed; if external diameter is larger than 250 mm, iron is used.
Representation of pulley
representation of T type pulley representation of ARC tooth representation of German T type pulley
Stype Stype Ftype Ftype Wtype
Dimension of HTD type pulley(mm)
type
pb
ht
R
S
半径r
angle
3M
3
1.28
0.91
1.90
0.3
14?
5M
5
2.16
1.56
3.25
0.48
14?
8M
8
3.54
2.57
5.35
0.8
14?
14M
14
6.20
4.65
9.80
1.4
14?
Dimension of HTD type pulley(mm)
齿距代号
type
type
VGrad
rd
rt
2a
SEbr
Nbr
SEhg
Nhg
difference
difference
difference
difference
T2.5
1.75
＋0.05
1.83
＋0.05
0.75
＋0.05
1
25
0.2
0.3
＋0.05
0.53
0
0
0
0
T5
2.96
＋0.05
3.32
＋0.05
1.25
＋0.05
1.95
25
0.4
0.6
＋0.05
0.85
0
0
0
0
10
6.02
＋0.1
6.57
＋0.1
2.6
＋0.1
3.4
25
0.6
0.8
＋0.1
1.85
0
0
0
0
20
11.65
＋0.15
12.6
＋0.15
5.2
＋0.13
6
25
0.8
1.2
＋0.1
2.85
0
0
0
0
Dimension & tolerance of linear type pulley（mm）
type
bw
hg
?+1.5?
rb
rt
2
MXL
0.85±0.05
0.69
20
0.35
0.13
0.508
XXL
1.14±0.05
0.84
25
0.35
0.30
0.508
XL
1.32±0.05
1.65
20
0.41
0.64
0.508
L
3.05±0.10
2.67
20
1.19
1.17
0.762
H
4.19±0.13
3.05
20
1.60
1.6
1.372
XH
7.90±0.15
7.14
20
1.98
2.39
2.794
XXH
12.17±0.18
10.31
20
3.96
3.18
3.048
Pitch tolerance（mm）
outside diameter pitch
difference allowed
gap
gap allowed in 90?
<25.40
0.03
0.05
>25.40－50.80
0.03
0.08
>50.80－101.60
0.03
0.10
>101.66－177.80
0.03
0.13
>177.80－304.80
0.03
0.15
>340.80－508.00
0.03
0.18
>580.00
0.03
0.20
Tolerance of outside diameter of pulley（mm）
outside diameter
outside diameter
<25.40
+0.050
>25.40-50.80
+0.080
>50.80-101.60
+0.100
>101.60-177.80
+0.130
>177.80-304.80
+0.150
>304.80-508.00
+0.180
>508.00
+0.200
Allowable bounce of pulley end（mm）
outside diameter
allowable bounce
<101.60>101.60－254.00>254.00
0.10outside diameter?0.0010.25＋[(outside diameter-254.00)?0.005]
Allowable bounce of pulley warp direction（mm）
outside diameter
allowable bounce
<203.20>1203.20
0.13outside diameter?0.0010.13＋[(outside diameter-203.20)?0.005]
