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ROSTA Tensioner Unit with Sprocket Idler (Part Numbers)

ROSTA Tensioner Unit with Sprocket Idler
  • Volume Discount

MIKI PULLEY

MIKI PULLEY

By installing a sprocket on the Rosta tensioner unit SE model, it can be used as a chain tensioner.

PDF

Part Number

Configured Part Number is shown.

Drawing

[NSE]

ROSTA tensioner unit with sprocket idler drawing 01
 

■ For details of the tensioner section, please refer to the SE model in the diagram below.

[SE]

ROSTA tensioner unit with sprocket idler drawing 02
 

[Sprocket Idler N]

ROSTA tensioner unit with sprocket idler drawing 03

Product Specification

Part numberLoad range F [N]Maximum displacement S1 [mm]Maximum displacement S2 [mm]Applicable chainWeight [kg]
NSE-15-35S0 to 1355040350.55
NSE-15-35D0.70
NSE-18-35S0 to 3505040350.75
NSE-18-35D0.90
NSE-18-40S400.83
NSE-18-40D1.1
NSE-27-50S0 to 8106550502.1
NSE-27-50D2.5
NSE-27-60S602.2
NSE-27-60D2.8
NSE-38-80S0 to 1,5008870804.5
NSE-38-80D5.4
NSE-45-100S0 to 2,650113901007.5
NSE-45-100D9.4
NSE-45-120S1208.5
NSE-45-120D10.9

*The load range is for the normal position specification.
  The load range for the hard position is approximately 1.25 times the load range for the normal position.

Design Confirmation Points

■ Selection

In the case of chain transmission, there is no need to apply excessive initial tension to the chain itself for meshing transmission with the sprocket. Therefore, a small tension just enough to take up the slack in the chain is sufficient for the chain tensioner.
Please select the size of the tensioner according to the chain size from the table below.
In this case, set the tensioner angle to 10–15°. For long chains, please take the weight of the chain itself into consideration.

 
Chain sizeNSE size
35NSE-15, NSE-18
40 NSE-18
50·60NSE-27
80NSE-38
100, 120 NSE-45
 

Specifications Table

 

[NSE]

Unit: mm
Part numberABDGH1L3UY adjustment rangeMM2
NSE-15-35S64 (-0.5 to +1)254551007919-41M8 x 25M10 x 55
NSE-15-35D24-37
NSE-18-35S79 (-0.5 to +1.5)3058710072435-54M10 x 30M10 x 55
NSE-18-35D39-50
NSE-18-40S35-54
NSE-18-40D39-50
NSE-27-50S108 (-0.5 to +2)5078813082841-79M12 x 40M12 x 80
NSE-27-50D47-73
NSE-27-60S41-79
NSE-27-60D47-73
NSE-38-80S140 (-0.5 to +2)609510175134060-97M16 x 40M20 x 100
NSE-38-80D67-90
NSE-45-100S200 (-0.5 to +2)7011512225137090-155M20 x 50M20 x 130
NSE-45-100D108-136
NSE-45-120S90-155
NSE-45-120D116-129

*The symbol S at the end of the size indicates a single row sprocket, and D indicates a double row sprocket.

 

■ For detailed tensioner dimensions, please refer to the SE model table below.

[SE]

Unit: mm
Part numberABDEGH1H2LNPUTM
SE-1151 (-0.5 to +1)20356580609022816.58.5M6 × 20
SE-15 / SE-I-1564 (-0.5 to +1)25458510080112.5308.520.810.5M8 x 25
SE-18 / SE-I-1879 (-0.5 to +1.5)305810.5710080115358.525.310.5M10 x 30
SE-27 / SE-I-27108 (-0.5 to +2)50781581301001555210.534.312.5M12 x 40
SE-38 / SE-I-40140 (-0.5 to +2)60 (70)95 (100)151017514020566 (70)12.5 (12)42.0 (41.5)20.5M16 x 40
SE-45200 (-0.5 to +2)7011518122251802608012.552.020.5M20 x 50

*The dimensions in parentheses for SE-38 and SE-I-40 refer to the dimensions of SE-I-40.

 

[Sprocket Idler N]

Unit: mm
Part numberCompatible
tensioner		O.DP.DBDHdd1LTNumber of teethbearing
N-15-35SNSE-15-35S6660.899-1030-4.4206200ZZ
NSE-18-35S
N-15-35DNSE-15-35D5014.44.3
NSE-18-35D
N-18-40SNSE-18-40S7569.129-1030-7.3176200ZZ
N-18-40DNSE-18-40D5421.57.1
N-27-50SNSE-27-50S8981.3712-1237-8.9166301ZZ
N-27-50DNSE-27-50D6326.88.7
N-27-60SNSE-27-60S9585.6112-1237-11.9146301ZZ
N-27-60DNSE-27-60D6434.511.7
N-38-80SNSE-38-80S10898.1415-2052-15.0126304ZZ
N-38-80D NSE-38-80D6943.914.6
N-45-100S NSE-45-100S127112.7015-2052-18.0116304ZZ
N-45-100DNSE-45-100D7653.417.6
N-45-120S NSE-45-120S140123.3015-2052-24.0106304ZZ
N-45-120DNSE-45-120D7868.923.5

*Please use in combination with the Rosta tensioner SE model.
*Bolts and nuts for fixing the sprocket idler are included as accessories.
*The symbol S at the end of the size indicates a single row sprocket, and D indicates a double row sprocket.

Usage Example

Usage Examples

■ Idler Settings

ROSTA tensioner unit with sprocket idler usage method 01
Always set the idler on the slack side of the chain or belt before use. For forward and reverse rotation, set the idler on both sides before use.
Rosta tensioner unit with sprocket idler Usage Method 02
When applying tension from the outside of the chain or belt, set the idler on the small sprocket (pulley) side before use.
On the other hand, when applying tension from the inside, please set the idler on the side of the larger sprocket (pulley).

For chain tensioners, make sure that at least three teeth of the sprocket idler are engaged with the chain.
If excessive tension is applied to the chain or belt, the lifespan of the chain, belt, and bearing will be significantly reduced.
Please allow for appropriate slack during use. A setting angle of approximately 10 to 15° is provided as a reference.
When applying tension from the inside of the V-belt, please use a V-pulley idler. For timing belts, please use a timing idler.
Since the tensioner fixing bolts and idler fixing bolts use strength class 8.8, please tighten them to the tightening torque specified below.

 
■ Tensioner Fixing Bolt
Part numberBolt Nominal Diameter × LengthProper Tightening Torque
[N⋅m]
NSE-15M8 x 2525
NSE-18M10 x 3049
NSE-27M12 x 4086
NSE-38M16 x 40210
NSE-45M20 x 50410
■ Idler Mounting Bolt
Part numberBolt Nominal Diameter × LengthProper Tightening Torque
[N⋅m]
NSE-15M10 x 60, 5520
NSE-18M10 x 60, 5520
NSE-27M12 × 75,8035
NSE-38M20×100,100160
NSE-45M20 × 140,130160

[Mounting]

Rosta tensioner unit with sprocket idler Usage Method 03
Align the positioning notch on the flange part of the Rosta tensioner with the designated position as specified in the design. If you mark the support plate or other mounting surface for the Rosta tensioner in advance to correspond with this notch, mounting will be easier. Additionally, this notch can also be used as an anti-rotation feature.
Rosta tensioner unit with sprocket idler Usage Method 04
Attach the Rosta tensioner to the machine using the included tensioner mounting bolts. In this case, please check the strength of the machine mounting section and ensure that the mounting surface is flat. If the Rosta tensioner cannot be mounted directly to the machine, please use a bracket (WS/WD model).
Rosta tensioner unit with sprocket idler Usage Method 05
Hold the outer shell of the Rosta tensioner with a wrench, tighten the included tensioner fixing bolt, and secure the Rosta tensioner. When using the Rosta tensioner near its allowable angle, use a torque wrench and tighten to the specified torque.
Lost Motion Tensioner Unit with Sprocket Idler Usage Method 06
Attach the sprocket idler to the Rosta tensioner. First, securely fix the idler fixing bolt to the arm with the lock nut. Next, adjust the sprocket idler within the specified mounting range (catalog Y dimension), align it with the chain line, and then secure it with two nuts.
Lost Motion Tensioner Unit with Sprocket Idler Usage Method 07
Always set the idler on the inside of the arm when using. If you must set it on the outside of the arm, install it as close to the arm as possible. In this case, the allowable torsion angle is Max. ±15° or less.

*Rubber (NR) has insufficient resistance to oil and grease, so please avoid contact with these substances.

Product Feature Details

· Maintains proper belt tension and automatically absorbs chain slack, vibration, and shock
The basic structure consists of an arm pre-attached inside the Rosta suspension unit, with the outer shell in a flange type shape. Installation requires only a single center bolt, making it easy to maintain proper belt tension, absorb chain slack, and install components such as conveyor belt scrapers and pressure rollers.

30
60
90
  1. 1
Part Number
NSE-15-35D
NSE-15-35S
NSE-18-35D
NSE-18-35S
NSE-18-40S
NSE-27-50D
NSE-27-50S
NSE-27-60D
NSE-27-60S
NSE-38-80D
NSE-45-100D
NSE-45-100S
NSE-45-120D
NSE-45-120S
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSA
(㎜) 		B
(㎜) 		D
(㎜) 		Thread Size Screw size 2 Size Sprocket nominal

MYR 726.78

1 Piece(s)Available 17 Day(s) or more 10642545M8×25M10×551535D

MYR 538.00

1 Piece(s)Available 5 Day(s) or more 10642545M8×25M10×551535S

MYR 784.95

1 Piece(s)Available 17 Day(s) or more 10793058M10×30M10×551835D

MYR 596.74

1 Piece(s)Available 17 Day(s) or more 10793058M10×30M10×551835S

MYR 623.27

1 Piece(s)Available 5 Day(s) or more 10793058M10×30M10×551840S

MYR 1,186.35

1 Piece(s) 17 Day(s) or more 101085078M12×40M12×802750D

MYR 926.67

1 Piece(s)Available 5 Day(s) or more 101085078M12×40M12×802750S

MYR 1,266.55

1 Piece(s) 17 Day(s) or more 101085078M12×40M12×802760D

MYR 865.06

1 Piece(s)Available 6 Day(s) or more 101085078M12×40M12×802760S

MYR 2,238.11

1 Piece(s) 17 Day(s) or more 101406095M16×40M20×1003880D

MYR 3,619.18

1 Piece(s) 17 Day(s) or more 1020070115M20×50M20×13045100D

MYR 2,589.20

1 Piece(s) 17 Day(s) or more 1020070115M20×50M20×13045100S

MYR 4,427.63

1 Piece(s) 17 Day(s) or more 1020070115M20×50M20×13045120D

MYR 2,984.46

1 Piece(s) 17 Day(s) or more 1020070115M20×50M20×13045120S

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  1. 1
 

Basic Information

Type Tensioner/Idler Set Applications Chain

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Specification/Dimensions

  • A(㎜)

    • 64
    • 79
    • 108
    • 140
    • 200

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  • B(㎜)

    • 25
    • 30
    • 50
    • 60
    • 70

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  • D(㎜)

    • 45
    • 58
    • 78
    • 95
    • 115

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  • Thread Size

    • M8×25
    • M10×30
    • M12×40
    • M16×40
    • M20×50

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  • Screw size 2

    • M10×55
    • M12×80
    • M20×100
    • M20×130

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  • Size

    • 15
    • 18
    • 27
    • 38
    • 45

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  • Sprocket nominal

    • 35D
    • 35S
    • 40S
    • 50D
    • 50S
    • 60D
    • 60S
    • 80D
    • 100D
    • 100S
    • 120D
    • 120S

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  • type

    • NSE

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Days to Ship

    • All
    • 5 Day(s) or Less
    • 6 Day(s) or Less
    • 17 Day(s) or Less

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