Timing belt pulleys / T2.5 / flanged pulley selectable / configurable / aluminium

Timing belt pulleys / T2.5 / flanged pulley selectable / configurable / aluminium

(i)Remark

  • Please note that the swaged flange options, NFC, RFC, and LFC, are not reflected in the CAD data.
  • Please check the content on our website as the PDF does not contain the most up-to-date information.

Part Number

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Unfortunately, sales of the 12-tooth model have been discontinued because the E dimension becomes thinner when the shaft bore is machined, making it easy for the collar and flange to come off. (December 2015)
■T2.5
● Pulley Shape
Shape K
Shape B
Standard Tooth Profile
(Pitch: 2.5 mm)
■Belt Nominal Width / Dimensions
mmNominal
T25070
A (Shape K)8
A (Shape B)8
W (Shape B)12
L20
■Tapped Hole Dimensions (Shaft Bore Specs.: P, N, C)
dH7
Shaft Bore I.D.
M
(Coarse)
Accessory
Set Screws
4·5M3M3 × 3
6 to 14M4M4 × 3
■Number of Teeth / Dimension
mmNumber of Teeth
14151618202224252628303234364044485060
P.D.11.1411.9412.7314.3215.9217.5119.1019.8920.6922.2823.8725.4627.0628.6531.8335.0138.2039.7947.75
O.D.10.6011.4012.2013.8015.4017.0018.5519.3520.1521.7523.3524.9526.5528.1031.3034.5037.7039.2547.25
D14141417211212121214141616161824262830
F14141417202225252528283032323540404450
E88810131416161618182023232528283238
[ ! ] Shaft Bore Specs. H (Round hole) and V or F (Stepped Hole) do not have tapped holes.
[ ! ] The tolerance of the tap position dimension from the boss end face and pulley end face is ±0.3.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.
● Shaft Bore Specification
Select shaft bore spec mark and each dim. from the table below. [!] Surface treatment may not be applied to the shaft bores.
H round hole

[ ! ] No tapped holes
or set screws.

P Round Hole + Tap

N New JIS Keyway + Tap
C Old JIS Keyway + Tap

[ ! ] When selecting
"New JIS Keywayed Bore"
+ "Shaft Bore Dia. 10"
+ "Keyway Width 4.0 mm
Specify NK10.

V stepped hole


[ ! ] No tapped holes or set screws.
F Stepped Hole
 (Counterbored Hole on the Hub Side)

[ ! ] Applicable to Shape B only
[ ! ] No tapped holes or set screws.
TypeBelt Width[M]Material*1[S] Surface Treatment[A]Accessory*1
Set Screws
7 mmPulleyFlange
T2.5
TTPA2000 Series Aluminum AlloyAluminum alloyClear AnodizeEN 1.4301 Equiv.
*1The above materials and accessories might be changed to the ones equivalent to the originals. [!]Flange is already swaged, and set screws are included for Shaft Bores P, N and C.

Specification Table

 Part numberPulley ShapeShaft Bore Specs.: I.D.ZJ
(Shaft Bore Specs.: H, P, N, C)TTPA18T25070KP4    
(Shaft Bore Specs.: V, F)TTPA60T25070BV15Z20J8

 

Part numberPulley
Shape
Pulley Shape
TypeNumber of TeethType
Nominal Width
Shaft Bore Specs.: 1 mm Increments / Selectable
H (d)
Round Hole
P (d)
Straight Bore + Tap
N, C (d)
Keyway + Tap
V·F
Stepped Hole
V, F (d)Z
Z−d ≥ 2
J
(0.1 mm Increments)
Aluminum
TTPA
14T25070K44
1544
164·54·5
184·54·5
205·6·6.355·6·6.35
22B5·6·6.355·6·6.355·67·82.0 ≤ J ≤ L−2.0
245·6·6.355·6·6.355·67·8
255·6·6.355·6·6.355·67·8
265·6·6.355·6·6.355·67·8
285·6·6.355·6·6.355·67·8
305·6·6.355·6·6.355 to 87 to 10
325·6·6.35·7·85·6·6.35·7·885 to 107 to 122.0 ≤ J ≤ L−2.0
345·6·6.35·7·85·6·6.35·7·885 to 107 to 12
365·6·6.35·7·85·6·6.35·7·885 to 137 to 15
405·6·6.35·7·85·6·6.35·7·885 to 147 to 16
446·6.35·7 to 106·6.35·7 to 108·10·NK106 to 148 to 162.0 ≤ J ≤ L−2.0
486·6.35·7 to 126·6.35·7 to 128·10·NK10·11·126 to 148 to 16
506·6.35·7 to 126·6.35·7 to 128·10·NK10·11·126 to 228 to 24
606·6.35·7 to 146·6.35·7 to 148·10·NK10·11 to 146 to 248 to 26
[NG] Shaft Bore Dia. 8, 11, 13, or 14 are not available for Shaft Bore Spec. C.

 

Alterations

Part numberPulley ShapeShaft Bore Specs.: I.D. Z  J (KC90, etc.)
TTPA40T25070BP5    FC33
AlterationsSet Screw Angle ChangeNo FlangeSingle FlangeFlange CutHub ShorteningTapped Hole DimensionsIncluded Set Screw Length Change
CodeKC90NFCRFC·LFCFCBCTPCSLH
Spec.Changes an angle of set screw to 90°.



 
(Flange 2 pcs. Included)
Ordering Code NFC


  
(Flange 1 pc. Included)
Ordering Code RFC
[NG] Not applicable to Shape K

Cut the flange O.D. in 0.5 mm increments

Ordering Code FC17
Application Notes
[ ! ]FC ≥ (O. D.) +1
[ ! ]FC ≤ F-2
[ ! ] No surface treatment is applied on flange circumference.


    
Cuts the hub length in 0.5 mm increments

Ordering Code BC6.5
Application Notes
[!] Shaft Bore Specs. H, V, F:
  3 ≤ BC < L-W
[!] Shaft Bore Specs. P, N, C:
  M+3 ≤ BC < L-W
[NG] Not applicable to Shape A
    
Ordering Code TPC5
Application Notes
[ ! ] Applicable to Shaft Bore Specs. P, N, C only
  M   TPC 
M3M4
M4M3
Ordering Code SLH10
Application Notes
[ ! ] Applicable to Shaft Bore Specs. P, N, C only
Set Screws SLH 
M3 × 36
M4 × 35·8
AlterationsAdd Side Holes [!] Conditions may vary depending on the shaft bore specs.
Side Tapped HoleSide Through HoleSide Counterbored
CodeQTC·QFCKTC·KFCZTC·ZFC
Spec.Machines tapped hole on the side surface of hub side.
Ordering Code QTC28-M4
Q□C Selection Specify the hole position (P. C. D. dim.).  
M Selection M3, M4, M5
Application Notes
[NG] Not applicable to Shape K
[ ! ] Minimum Thickness: 2 mm
[!] Conditions may vary depending on the shaft bore specs.
Machines through hole on the side surface.
Ordering Code KTC28-K4.5
K□C Selection Specify the hole position (P. C. D. dim.).  
Specify K K4.0 to 11.0 (0.5 mm Increments)
Application Notes
[NG] Not applicable to Shape K
[ ! ] Minimum Thickness: 2 mm
[!] Conditions may vary depending on the shaft bore specs.
Machines counterbored hole on the side surface.
Ordering Code ZTC28-ZM4
Z□C Selection Specify the hole position (P. C. D. dim.).  
ZM Selection ZM3, ZM4, ZM5
Application Notes
[NG] Not applicable to Shape K
[ ! ] Minimum Thickness: 2 mm
[!] Conditions may vary depending on the shaft bore specs.
(4 Locations) (3 Locations)
(4 Locations) (3 Locations)
(4 Locations) (3 Locations)

Part Number:  

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Part Number
TTPA14T25070-K-H4
TTPA14T25070-K-P[4,​5]
TTPA15T25070-K-H4
TTPA15T25070-K-P4
TTPA16T25070-K-H[4,​5]
TTPA16T25070-K-P[4,​5]
TTPA18T25070-K-H[4,​5]
TTPA18T25070-K-P[4,​5]
TTPA20T25070-K-H[5,​6,​6.35]
TTPA20T25070-K-P[5,​6,​6.35]
TTPA22T25070-B-F[5,​6]
TTPA22T25070-B-H[5,​6,​6.35]
TTPA22T25070-B-P[5,​6,​6.35]
TTPA22T25070-B-V[5,​6]
TTPA24T25070-B-F[5,​6]
TTPA24T25070-B-H[5,​6,​6.35]
TTPA24T25070-B-P[5,​6,​6.35]
TTPA24T25070-B-V[5,​6]
TTPA25T25070-B-F[5,​6]
TTPA25T25070-B-H[5,​6,​6.35]
TTPA25T25070-B-P[5,​6,​6.35]
TTPA25T25070-B-V[5,​6]
TTPA26T25070-B-F[5,​6]
TTPA26T25070-B-H[5,​6,​6.35]
TTPA26T25070-B-P[5,​6,​6.35]
TTPA26T25070-B-V[5,​6]
TTPA28T25070-B-F[5,​6]
TTPA28T25070-B-H[5,​6,​6.35]
TTPA28T25070-B-P[5,​6,​6.35]
TTPA28T25070-B-V[5,​6]
TTPA30T25070-B-F[5-8/1]
TTPA30T25070-B-H[5,​6,​6.35]
TTPA30T25070-B-P[5,​6,​6.35]
TTPA30T25070-B-V[5-8/1]
TTPA32T25070-B-F[5-10/1]
TTPA32T25070-B-H[5,​6,​6.35,​7,​8]
TTPA32T25070-B-N8
TTPA32T25070-B-P[5,​6,​6.35,​7,​8]
TTPA32T25070-B-V[5-10/1]
TTPA34T25070-B-F[5-10/1]
TTPA34T25070-B-H[5,​6,​6.35,​7,​8]
TTPA34T25070-B-N8
TTPA34T25070-B-P[5,​6,​6.35,​7,​8]
TTPA34T25070-B-V[5-10/1]
TTPA36T25070-B-F[5-13/1]
TTPA36T25070-B-H[5,​6,​6.35,​7,​8]
TTPA36T25070-B-N8
TTPA36T25070-B-P[5,​6,​6.35,​7,​8]
TTPA36T25070-B-V[5-13/1]
TTPA40T25070-B-F[5-14/1]
TTPA40T25070-B-H[5,​6,​6.35,​7,​8]
TTPA40T25070-B-N8
TTPA40T25070-B-P[5,​6,​6.35,​7,​8]
TTPA40T25070-B-V[5-14/1]
TTPA44T25070-B-C10
TTPA44T25070-B-F[6-14/1]
TTPA44T25070-B-H[6,​6.35,​7,​8,​9,​10]
TTPA44T25070-B-N[8,​10]
TTPA44T25070-B-NK10
TTPA44T25070-B-P[6,​6.35,​7,​8,​9,​10]
Part Number
Standard Unit Price
Minimum order quantityVolume Discount
Standard
Shipping Days
?
RoHS[T] Number of Teeth Pulley Shape C F
(mm)
H N NK P V
(mm)

-

1 7 Days 1014Shape K--4----

-

1 7 Days 1014Shape K-----4 ~ 5-

-

1 7 Days 1015Shape K--4----

-

1 7 Days 1015Shape K-----4-

-

1 7 Days 1016Shape K--4 ~ 5----

-

1 7 Days 1016Shape K-----4 ~ 5-

-

1 7 Days 1018Shape K--4 ~ 5----

-

1 7 Days 1018Shape K-----4 ~ 5-

-

1 7 Days 1020Shape K--5 ~ 6.35----

-

1 7 Days 1020Shape K-----5 ~ 6.35-

-

1 7 Days 1022Shape B-5 ~ 6-----

-

1 7 Days 1022Shape B--5 ~ 6.35----

-

1 7 Days 1022Shape B-----5 ~ 6.35-

-

1 7 Days 1022Shape B------5 ~ 6

-

1 7 Days 1024Shape B-5 ~ 6-----

-

1 7 Days 1024Shape B--5 ~ 6.35----

-

1 7 Days 1024Shape B-----5 ~ 6.35-

-

1 7 Days 1024Shape B------5 ~ 6

-

1 7 Days 1025Shape B-5 ~ 6-----

-

1 7 Days 1025Shape B--5 ~ 6.35----

-

1 7 Days 1025Shape B-----5 ~ 6.35-

-

1 7 Days 1025Shape B------5 ~ 6

-

1 7 Days 1026Shape B-5 ~ 6-----

-

1 7 Days 1026Shape B--5 ~ 6.35----

-

1 7 Days 1026Shape B-----5 ~ 6.35-

-

1 7 Days 1026Shape B------5 ~ 6

-

1 7 Days 1028Shape B-5 ~ 6-----

-

1 7 Days 1028Shape B--5 ~ 6.35----

-

1 7 Days 1028Shape B-----5 ~ 6.35-

-

1 7 Days 1028Shape B------5 ~ 6

-

1 7 Days 1030Shape B-5 ~ 8-----

-

1 7 Days 1030Shape B--5 ~ 6.35----

-

1 7 Days 1030Shape B-----5 ~ 6.35-

-

1 7 Days 1030Shape B------5 ~ 8

-

1 7 Days 1032Shape B-5 ~ 10-----

-

1 7 Days 1032Shape B--5 ~ 8----

-

1 7 Days 1032Shape B---8---

-

1 7 Days 1032Shape B-----5 ~ 8-

-

1 7 Days 1032Shape B------5 ~ 10

-

1 7 Days 1034Shape B-5 ~ 10-----

-

1 7 Days 1034Shape B--5 ~ 8----

-

1 7 Days 1034Shape B---8---

-

1 7 Days 1034Shape B-----5 ~ 8-

-

1 7 Days 1034Shape B------5 ~ 10

-

1 7 Days 1036Shape B-5 ~ 13-----

-

1 7 Days 1036Shape B--5 ~ 8----

-

1 7 Days 1036Shape B---8---

-

1 7 Days 1036Shape B-----5 ~ 8-

-

1 7 Days 1036Shape B------5 ~ 13

-

1 7 Days 1040Shape B-5 ~ 14-----

-

1 7 Days 1040Shape B--5 ~ 8----

-

1 7 Days 1040Shape B---8---

-

1 7 Days 1040Shape B-----5 ~ 8-

-

1 7 Days 1040Shape B------5 ~ 14

-

1 7 Days 1044Shape B10------

-

1 7 Days 1044Shape B-6 ~ 14-----

-

1 7 Days 1044Shape B--6 ~ 10----

-

1 7 Days 1044Shape B---8 ~ 10---

-

1 7 Days 1044Shape B----10--

-

1 7 Days 1044Shape B-----6 ~ 10-

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General Information - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Toothed pulley - synchronous pulley - belt pulley - product assortment

 

Selection details of toothed pulleys/timing pulleys/idler pulleys

- Material: aluminum, steel, stainless steel (stainless steel), plastic

- Coatings: uncoated, burnished, anodized, nickel-plated

- Profile form: 1.5GT, 2GT, 3GT, 5GT, P2M, P3M, P5M, P8M, S2M, S3M, S5M, S8M, S14M, T2.5, T5, T10, AT5, AT10, 5M, 8M, 14M, 8YU, H, L, MXL, XL, PowerGrip GT3: MR2, MR3, MR5

- ISO tolerances: H7

- Belt width (mm): 4, 4.8, 6, 6.4, 7, 7.9, 9, 9.5, 10, 12, 12.7, 15, 18, 19.1, 20, 25, 25.4, 26, 28, 30, 31, 38,1, 40, 50, 50.8, 53, 60, 74, 76.2, 100

- Belt width (inches): 0.19, 0.25, 0.31, 0.37, 0.5, 0.75, 1, 1.5, 2

- Number of teeth: 10 to 72

 

Description/Basics

The toothed pulley for mechanical engineering is intended for the transmission of force and torque. Timing pulleys enable a gear ratio of speeds through belt pulleys of different sizes. Timing pulleys are more efficient, durable and significantly more maintenance-friendly compared to chain transmissions.

How much torque and load a timing pulley can transmit depends on the width of the belt. The width of the belt must be calculated. It is recommended to ensure the belt is correctly tensioned. MISUMI already offers the suitable idler pulley and return rollers with integrated ball bearings. For design and design help follow this link.

Different profile shapes of the toothed belts and belt pulleys are responsible for the transmission of power. Depending on the positioning accuracy, the applied torque and the conveying weight, MISUMI offers the fitting pulley. Toothed belt drives are generally used in the industry in three areas:
Positioning: Timing pulleys is often used in 3D printers. A toothed pulley with a semi-circular profile (e.g., GT) is often used for the required position accuracy of a 3D printers. The round shape offers the benefit of little play when the direction changes.
Drive: toothed pulleys are also used for high torque. In most cases, a timing pulley with a rounded trapezoidal profile (e.g., S8M) is used. These are particularly well suited for the transmission of high forces, which occur in drives of various applications in order to drive mechanical components.
Conveying: toothed pulleys can also be used for transporting loads. A straight trapezoidal profile is often used for this purpose (e.g., AT). This toothed pulley shape offers a large surface for loading and transmitting of loads.

Which toothed pulley or timing pulley is the right one for your application depends on the respective task of the toothed belt drive. Different toothed disc profiles have proven themselves for each type of application.

Various bore hole shapes and fastening variants are available for shaft mounting. These allow fastening via set screws, keyways and by means of Mecha locks. Fastening via a clamping sleeve has the further advantage that it allows adjusting the alignment continuously. The MISUMI product assortment has these ready-to-install.

Application Examples - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Application example: idler pulley - idler pully toothed with chain tensioner - toothed pulley with chain tensioner

Application example: idler pulley
(1) Idler pulleys, (2) chain tensioner

Application example: return roller - return roller with cantilever pin - synchronous pulley with on-board disc - toothed pulley with on-board disc

Application example: deflection roller
S (1) Toothed pulleys with crimp disc, (2) nut, (3) washer, (4) cantilever shaft, (5) retaining ring

Application example: synchronous pulleys - toothed pulleys with toothed belts - toothed pulley with screw-on clamp

Application example: timing pulleys
(1) Flat head screw, (2) Timing pulley, (3) Timing belt, (4) Screw-on terminal

Application example: toothed belt drives - toothed pulleys with crimp disc - idler pulley with crimp disc - tensioning of the toothed belt

Application example: of toothed belt drives
(1) Toothed belt, (2) driven toothed pulley with crimp disc, (3) idler pulley with crimp disc, (4) driving toothed pulley with crimp disc

 

Industrial Applications

3D printer industry
Automotive industry
Pharmaceutical industry
Packaging industry

Basic information

Type Timing Pulleys Belt Type T2.5 Belt Width(mm) 7
Material EN AW-2017 Equiv. (Duralumin) Surface Treatment Clear Anodize Timing Pulleys/Idlers Pulleys

Frequently Asked Questions (FAQ)

Question:

Do you have any belt pulleys without a hole?

Answer:

The MISUMI toothed pulleys always have a pilot bore. It is expanded depending on your configuration. It provides the advantage that the belt pulleys are already provided with a suitable shaft bore ready for installation. Therefore, it does not require time-consuming post-processing.

Question:

Do you have timing pulleys made of aluminum?

Answer:

The MISUMI online shop also offers timing pulleys or toothed pulleys in aluminum. Furthermore, we are also offering belt pulleys in steel and stainless steel. The return rollers and idler pulleys for the timing belts are also available in plastic.

Question:

Is a transmission with toothed belt pulleys possible?

Answer:

With toothed pulleys, a gear ratio is possible in a drive. The gear ratio is established based on the number of teeth on the belt pulleys. It should be ensured that the minimum number of teeth of the timing pulley disc is not undercut.

Question:

Which type of the toothed belt pulley can be clamped during assembly?

Answer:

There are a number of ways to install timing pulleys on a shaft. For applications that are not exposed to high torque, such as conveyors, it can be sufficient to fasten a timing pulley using clamping threaded pins. For this purpose, the shaft should have a flat surface.
For higher loads, a toothed pulley with a keyway can also be used.
A further variant is the fastening of a timing pulley via a conical chip sleeve. Depending on the type of Mecha lock, the timing pulley requires lateral internal threads, which can be added through additional options in the MISUMI online shop.
A timing pulley with a bore hole can also be combined with a Mech lock. MISUMI is offering this combination as a set.

Question:

Where do you position the tension roller?

Answer:

If an idler pulley should be utilised, it should be positioned on the sag side. This means that the idler pulley is attached to the side not subjected to pull.
Ideally, a toothed idler pulley is mounted on the inside of the toothed belt. The tensioning roller should always be larger than the smallest toothed idler pulley of the belt drive system.
If an idler pulley must tension the toothed belt from the outside, then a non-toothed (flat) idler pulley should be used. Cantilever pins, which MISUMI offers in various geometric versions, are suitable for fastening.

Question:

Which parallel key can be used for the toothed pulleys?

Answer:

The parallel key size is based on the shaft diameter. In this case, it is recommended using the MISUMI parallel keys, as they fit better when MISUMI toothed pulleys are used. See Overview available as PDF for keyway tolerances.

Question:

Is a timing pulley with a round profile better?

Answer:

Timing pulleys and round-profile timing belts are not recommended for every application. For example, the round profile shape is well suited for applications that require high positioning accuracy. Therefore, they are often used in 3D printers and scanners. Compared to other profile shapes, the round profile shape has a higher wear resistance. Another advantage of the round profile shape is the minimized play in the return (reverse play).

Question:

Which belt pulley is suitable for Gates toothed belts?

Answer:

The GT and EV timing pulleys are suitable for Gates’ toothed belts. However, these require you put attention to the slope (distance of the teeth) of the toothed belt. It must be checked whether these correspond to the selected toothed pulley.

Question:

Are the curtain discs necessary for the toothed pulleys?

Answer:

It is recommended using the smaller belt pulleys particularly with curb disc. The curb disk ensures that the toothed belt does not migrate down from the toothed belt pulley. Even with the smallest misalignment of a pulley, there may be a risk that the toothed belt will move and jump during operation.

Question:

How is the gearing of the toothed pulleys manufactured?

Answer:

The gear teeth of the MISUMI toothed belt pulley are mainly pushed. This ensures high manufacturing accuracy. As a result, the teeth fit precisely into the toothed belt profile of the timing belts and ensure optimal power and torque transmission.

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