The M series represents TwinSpin high precision reduction gears of mini sizes. The first representative of the series is the size TS 50, and in the near future we plan to introduce even smaller TwinSpin gears that will widen the M series. This design of the reduction gears allows the mounting of the load directly on the output flange or case without a need of additional bearings.

The M series has retained all the qualities of the larger SPINEA gears. We can proudly say that, in their category, they represent the best gears on the market.

The M series is filled with grease for lifetime. The sealing of the M series reduction gears is secured by sealed (2RS) ball bearings, which are used as output bearings of the reduction gear, and they are also used for the housing of the input shaft of the reduction gear (slight leakage of the lubricant is allowed). Upon the customer’s request, SPINEA is able to supply a completely sealed reduction gear.


  •  small dimensions and compact design                      
  •  fully sealed by 2RS ball bearings
  •  simple installation 
  •  zero-backlash reduction gear
  •  very low mass
  •  very high power density
  •  output deep groove ball output bearing with very low friction
  •  high performance of the reduction gear
    •  high precision
    •  high torsion rigidity
    •  high linearity of torsion chracteristics
  •  very low input inertia
  •  very low friction and high efficiency


TwinSpin M series mini reduction gear versions

Shape of the case

a) The mounting part of the case is located on the ouput side           of the TwinSpin high precision reduction gear

b) The mounting part of the case is located on the input side           of the TwinSpin high precision reduction gear

Input shaft connection

a) Direct connection of shafts without couplings. The motor shaft is aligned with the hole with a keyway

b) Indirect connection of shafts with rigid or flexible couplings

c) Shafts are aligned according to the customer requirements



The M series high precision reduction gears are manufactured in several modifications according to the specification of the shaft and the case.

M series ordering specifications



Ratio Series
Shaft version





47, 63 M 6 8 according to special request

Note: An example of an ordering code of a modified TwinSpin reduction gear with a motor flange: TS 50 – 63 – M - P6– M235 – P231. The markings M235 and P231 for a specific modification are defined by the manufacturer.

Rating tables M series


Reduction ratio Rated output torque

Acceleration and braking torque

Permissible torque at
emergency stop
Rated input speed Rated output speed Max. continuous input speed Max. allowable input speed  1)6) Tilting stiffness 1) Torsional stiffness 1)
i TR [Nm] Tmax [Nm] Tem [Nm] nR [rpm] nRout [rpm] ncmax [rpm] nmax [rpm] Mt [Nm/arcmin] kt [Nm/arcmin]

TS 50



18 36 90 2000


3000 5000 4 2,5


1/ Mean statistical value.
2/ Load at output speed nRout=nR/i. for TS 50 M it is 32 [rpm].
3/ Tilting moment Mc max at Fa=0. If Fa≠0 see par.3.5.1.

4/ Axial force Fa max for Fr=0, Mc=0. If Mc≠0 par.3.5.1.
5/ Radial force Fr max for Fa=0. If Fa
0 see par.3.5.1.
6/ At 50% ncmax (max input speed in cycle)
7/ Applies to standard version of the high precision reduction gear with shaft connected by a key-way.
8/ a2 - is the distance of the radial force centre from the front of the output flange [m]

Rating tables M series

Average no-load starting torque 1) Average back driving torque 1)

Max. lost motion

Hysteresis Max. peak tilting moment 2)3) Max. radial force 2)4)8) Max. axial force 2)5) Input inertia 7) Weight 7)
[cNm] [Nm] LM [arcmin] H [arcmin] M c max [Nm] F rR [kN] F a max [kN] l [10-4 kgm2] m [kg]





<1,5 <1,5 44







1,9 0,007 0,47


Load values in table are valid for nominal life Lh=6000 [Hrs].

This website uses cookies

We use cookies so that we can provide you with the best user experience possible. More info...

  • Important Required for correct website functionality
  • Preferences Used to store your preferences
  • Analytics Used for analyzing website traffic
  • Personalization Used for delivering personalised content