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Notice regarding changes to model numbers for Timing Pulleys Products Information

We will be changing the model numbers of Timing Pulleys on April 1, 2017.

Affected models

1. Details of change

Material notation
Clarified steel and aluminum. Aluminum shown as [Code: A]. Steel [Code: S] has been abolished.
Cylindrical Pulleys
Cylindrical Pulleys
Fit Bore Easy Finished Bore Type
We have expanded variations of shaft bore chamfer, keyway size, and tap size. The available range has been greatly expanded.

2. Examples of model number changes

Standard Stock Pulleys model numbers

Previously the presence or absence of the material code differed depending on the size. From now on, we will unify the classification of steel and aluminum for all pulleys to be clear.

Comparison of old model numbers and new model numbers

An example in which the base pulley is aluminum but there is no code A given. Here, A will be given.

  • Old model numbers: PT30P2M6DF
  • New model numbers: PT30P2M6DF-A

An example in which the base pulley is steel and code S is given. Here, there will be no code.

  • Old model numbers: PT30P3M10BF-S
  • New model numbers: PT30P3M10BF

[In the case of PX belt tooth profiles]

PT 20 P2M6 DF - A
(1) Timing Pulley (2) Number of teeth (3) Belt models (4) Pulley series (5) Material

[Belt models]: PX Belts, HY Type Ultra PX Belts, Water Proof Type Ultra PX Belts (W), HC Type Ultra PX Belts, Oil Proof Type Ultra PX Belts (HA)

*For P14M-HY series belt use, please write [- HY] at the end to denote it is a specialized pulley.

[In the case of Trapezoidal Belts]

PT 20 MXL6.4 DF - A
(1) Timing Pulley (2) Number of teeth (3) Belt models (4) Pulley series (5) Material

[Belt models] : MXL, XL, L, H, XH, XXH

[In the case of Urethane Belts]

PT 20 T5-10 BF - A
(1) Timing Pulley (2) Number of teeth (3) Belt models (4) Pulley series (5) Material

[Belt models]: T = T tooth profile, AT = AT tooth profile, RPP = RPP tooth profile

Cylindrical Pulley model numbers

Since the base pulley material is aluminum, the material is shown with the code [-A]. In addition, although the flange set sales code [-S] previously meant that steel was used, set sales are now standard so this code has been abolished.

Comparison of old model numbers and new model numbers

Denoting base pulley material code and abolition of flange set sales code

  • Old model numbers: PT30P3M-100L-S
  • New model numbers: PT30P3M-100L-A

[In the case of PX belt tooth profiles]

PT 20 P 2M - 100L - A
Pulley Number of teeth Belt models: PX Pitch: 2M, 3M, 5M Cylindrical Pulley Material: Aluminum

[In the case of Trapezoidal Belts]

PT 20 MXL - 100L - A
Pulley Number of teeth Type: MXL, XL Cylindrical Pulley Material: Aluminum

[In the case of Urethane Belts]

PT 20 T 5 - 100L - A
Pulley Number of teeth Type: T tooth profile Pitch Cylindrical Pulley Material: Aluminum

Lock Pulley model numbers

The plated series omitted the S type sleeve frame number, but with the model number change we will denote the frame number.

Comparison of old model numbers and new model numbers

Sleeve frame number will not be omitted, and instead the frame number will be given.

  • Old model numbers: PT40P5M25AF-F318-K
  • New model numbers: PT40P5M25AF-FS2318-K
PT40P5M25AF - F S2 3 18 - K
Base sprocket model number Sleeve mounting type Sleeve frame number Number of locking bolts Shaft bore diameter: mm Surface treatment
PT30P2M6BF-A - C3 10
Base sprocket model number Sleeve frame number Shaft bore diameter: mm
PT30P5M15BF - N2 11 A
Base sprocket model number Sleeve frame number Shaft bore diameter: mm Sleeve mounting type

Timing Pulley Fit Bore Easy Finished Bore Type model numbers

We have expanded variations of shaft bore chamfer, keyway size, and tap size.

  • Yellow highlighted areas are expanded models.
  • Fit Bore Finished Bore Type model numbers will not change.
PT30P8M40BF - H 030 N - J 08 D2 M06 - K
Base sprocket model number Bore tolerance Shaft bore diameter: mm Chamfer code Keyway width tolerances and grades Keyway width Number of taps and position Tap sizes Surface treatment

Bore tolerance

  • G: G7
  • H: H7
  • M: M7
  • *Grade 7 only

Shaft bore diameter

  • Set for each size
  • Specify with three integers
  • (Plain bore diameter + 1 mm round-up integer-maximum bore diameter)

Chamfer code

    • N: C0.5
    • A: C1
    • B: C2
    • C: C3
  • Shaft bore diameter Chamfer amount
    10~17 N A - -
    18~44 N A B -
    45~80 N A B C

Keyway width tolerances and grades

  • J: Js9
  • F: F7
  • P: P9
  • E: E9
  • W: Without keyway

Keyway width

  • Specify with two integers (JIS standard)
  • *Without keyway: W00
  • *Keyway size can only be selected with Js9 and P9 (new JIS). Users can select duplicate min/max keyway sizes for applicable bore diameter ranges

Number of taps and position

  • D0 Number of taps and position
  • D1 Number of taps and position
  • D2 Number of taps and position
  • D3 Number of taps and position
  • D4 Number of taps and position
  • D5 Number of taps and position

Tap sizes

  • Specify with two integers (standard sizes) *Comes with set screws
  • *Without taps: D0M00. *Select upper and lower standard sizes. It should be greater than M4, and within the keyway width (see the following for more details)
  • [In the case of Js9・P9]

    Applicable Shaft bore diameter mm Keyway width mm Standard size Selectable size
    10~12 4 M4
    12~17 5 M5 M4
    17~22 6 M6 M5
    22~30 8 M6 M5, M8
    30~38 10 M8 M6, M10
    38~44 12 M8 M6, M10
    44~50 14 M8 M6, M10
    50~58 16 M10 M8, M12
    58~65 18 M10 M8, M12
    65~75 20 M12 M10, M16
    75~80 22 M12 M10, M16

    [In the case of F7・E9]

    Applicable Shaft bore diameter mm Keyway width mm Standard size Selectable size
    10~13 4 M4
    14~20 5 M5 M4
    21~30 7 M6 M5
    31~40 10 M8 M6, M10
    41~50 12 M8 M6, M10
    51~60 15 M8 ※ M6, M10
    61~70 18 M10 M8, M12
    71~80 20 M12 M10, M16

    Conventionally it is M10 but it will be changed to M8.

Surface treatment

  • K: Electroless nickel phosphorus plating
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