Asia & Pacific

Asia & Pacific

Nabtesco Precision Equipment Company

RV

Nabtesco Precision Equipment Company

RV

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    Introduction

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GearheadRA-C

Specialized gearhead for machine tools(Shaft rotating type)

The RA series is a gearhead type design for use mainly by machine tool manufacturers. This model enables precision indexing with case rotation. The RA series is widely used in ATC magazines, ATC arms, APCs, and turrets. Much like the RD series, this product can be used in a wide variety of applications in addition to those mentioned above.

Product Features

  • Compactness
  • Case capable revolution
  • Backlash less than 1 arc.min.
  • Lost motion less than 1 arc.min. Internal main bearing
  • Major motor coupling Parts included
  • Sealed grease

Application

Spec Information

Model
RA-20EC
RA-20EC
RA-20EC
RA-20EC
RA-20EC
RA-40EC
RA-40EC
RA-40EC
RA-40EC
RA-80EC
RA-80EC
RA-80EC
RA-80EC
RA-160EC
RA-160EC
RA-160EC
RA-160EC
RA-160EC
Discrimination1

 Series

 Unit Type

 Series Symbol

 Model

 Motor Series

 w number

(w)

 w number

(kw)

 Type

 Ratio

 Actual Ratio

 motor mounting direction

 Rated Torque

（N・m）

 Allowable Scceleration/Deceleration Torque

（N・m）

 Momentary Maximum Allowable Torque

（N・m）

 Dimension α1

(mm)

 Dimension α1

(mm)

 Dimension Din

(mm)

 Input Shaft Rated Moment

（N・m）

 Input Shaft Allowable Moment

（N・m）

 Dimensionβ

(mm)

 Rated Output Speed

（r.p.m.）

 Rated life

（hr）

 Allowable Output Speed

（r.p.m.）

 Allowable Input Speed

（r.p.m.）

 Backlash

(arc.min.)

 Lost Motion

(arc.min.)

 Torsional Regidity

(Nm/arc.min.)

 Moment Rejidity

(Nm/arc.min.)

 Start-up Effciency

(%)

 Moment of Inertia

(kg・m^2)

 Mass

(kg)

 Allowable Moment 1

(N・m)

 Allowance Thrust 1

(N)

 Allowable Moment 2

(N・m)

 Allowance Thrust 2

(N)

 Output Rotational Speed 1

(min-1)

 Output Torque 1

(N・m)

 Output Rotational Speed 2

(min-1)

 Output Torque 2

(N・m)

 Brake Holding Torque

(N・m)

 Reduced Value Of The Inertia Moment For The Input Shaft

(kgm2)

 Capacity

 Part Number

 Quantity

 Packaging Type

 Capacity

 Part Number

 Quantity

 Packaging Type

 Maximum allowable load (reference values)

(kg)

 Maximum center of gravity height

(mm)

 Maximum tilt angle

(deg)

 Reduction ratio (Rotary axis)

 Reduction ratio (Tilt axis)

 Allowable startup/stop torque (Rotary axis)

(Nm)

 Allowable startup/stop torque (Tilt axis)

(Nm)

 Rotary axis allowable output speed (Operation Example)

（r.p.m.）

 Tilt axis allowable output speed (Operation Example)

（r.p.m.）

 Backlash・Lost motion (Rotary axis)

(arc.min.)

 Backlash・Lost motion (Tilt axis)

(arc.min.)

 Moment of inertia I (I=GD2/4) motor input conversion (Rotary axis)

(kg-m2)

 Moment of inertia I (I=GD2/4) motor input conversion (Tilt axis)

(kg-m2)

 Motor capacity (reference values) ※1

(w)

 Wheel diameter

(mm)

 Maximum speed ※1

(m/min)

 Loading capacity/wheel

(kgf)

 Loading load/4 wheels AGV (reference values) ※1

(kgf)

0.375 81 81 167 412 15 6,000 less than 1 less than 1 49 372 0.00000607 9.5 882

0.375 105 105 167 412 15 6,000 less than 1 less than 1 49 372 0.00000432 9.5 882

0.375 121 121 167 412 15 6,000 less than 1 less than 1 49 372 0.00000356 9.5 882

0.375 141 141 167 412 15 6,000 less than 1 less than 1 49 372 0.00000288 9.5 882

0.375 161 161 167 412 15 6,000 less than 1 less than 1 49 372 0.00000239 9.5 882

0.924 81 81 412 1,029 15 6,000 less than 1 less than 1 108 931 0.000022 20 1,666

0.924 105 105 412 1,029 15 6,000 less than 1 less than 1 108 931 0.0000163 20 1,666

0.924 121 121 412 1,029 15 6,000 less than 1 less than 1 108 931 0.0000137 20 1,666

0.924 153 153 412 1,029 15 6,000 less than 1 less than 1 108 931 0.0000101 20 1,666

1.758 81 81 784 1,960 15 6,000 less than 1 less than 1 196 1,176 0.00006 27 2,156

1.758 101 101 784 1,960 15 6,000 less than 1 less than 1 196 1,176 0.0000482 27 2,156

1.758 121 121 784 1,960 15 6,000 less than 1 less than 1 196 1,176 0.0000396 27 2,156

1.758 153 153 784 1,960 15 6,000 less than 1 less than 1 196 1,176 0.0000298 27 2,156

3.517 81 81 1,568 3,920 15 6,000 less than 1 less than 1 392 2,940 0.000177 59 3,920

3.517 101 101 1,568 3,920 15 6,000 less than 1 less than 1 392 2,940 0.00014 59 3,920

3.517 129 129 1,568 3,920 15 6,000 less than 1 less than 1 392 2,940 0.000106 59 3,920

3.517 145 145 1,568 3,920 15 6,000 less than 1 less than 1 392 2,940 0.000087 59 3,920

3.517 171 171 1,568 3,920 15 6,000 less than 1 less than 1 392 2,940 0.000074 59 3,920
※1 Subject to change depending on the operating conditions

Download

RA-C
Series

Product Catalog

Instruction Manual

Product CAD Drawing 2D
Product CAD Drawing 3D
Selection Table of Model Code

Inquiry

Gearhead

Gearhead is a sealed and prelubricated precision gearbox, complete with accomodations for motor mounting ( major motor manufacturers). Three input types are available.

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    Introduction

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