SRG Model

三木プーリのサーボリジット SRG-DSタイプ リジットカップリング製品画像（高剛性直結・サーボモータ用高精度軸継手）
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Unlike flexible couplings, this design does not include elements to compensate for misalignment between the two shafts, resulting in extremely high torsional rigidity. Furthermore, compared to flexible couplings, the outer diameter can be reduced relative to the torque, allowing for coupling downsizing and contributing to a reduction in the moment of inertia.

[Specifications]

Model d1・d2 [mm] d1・d2 Permissible torque [N·m] for standard bore diameter [mm] Maximum Rotational
Speed [min⁻¹]		 Torsional spring constant
[N·m/rad]		 Moment of
Inertia [kg·m²]		 Mass
[kg]		 Price
[JPY]
Minimum Max 16 17 18 19 20 22 24 25 28 30 32 35 36 38 40 42 45 48
SRG-050DS 16 22 90 100 110 120 130 140 15,000 60,000 0.16×10⁻³ 0.45
SRG-060DS 18 25 80 100 110 145 180 190 13,000 115,000 0.29×10⁻³ 0.67
SRG-070DS 22 35 150 200 220 290 340 390 460 12,000 340,000 0.55×10⁻³ 0.85
SRG-080DS 30 48 180 220 270 290 320 360 390 440 490 9,500 1,335,000 1.21×10⁻³ 1.17
  • Since the shaft is secured by friction, the allowable torque is determined by the bore diameter. The allowable torque value for the smaller diameter is the allowable torque for the coupling.
  • The maximum rotational speed does not take dynamic balance into account.
  • The torsional spring constant, moment of inertia, and mass are based on the values at the maximum bore diameter.

[Dimensions]

三木プーリのサーボリジットSRGモデルDSタイプリジットカップリング寸法図 取付寸法および軸径寸法を示す寸法図
Unit [mm]

Model Standard Hole Diameter d1, d2 D L LF LP C H M1 M2
SRG-050DS 16, 17, 18, 19, 20, 22 48 52.8 20 4 4.4 4–5.1 4–M6 2-M6
SRG-060DS 18, 19, 20, 22, 24, 25 54 62 24 5
SRG-070DS 22, 24, 25, 28, 30, 32, 35 64 6-M6
SRG-080DS 30, 32, 35, 36, 38, 40, 42, 45, 48 78 63 25.5 4
  • The designations for the M1 pressure bolts and M2 removal screw holes are based on the quantity and thread size. Note that the quantity listed refers to the number on one side only.
三木プーリのサーボリジット SRGモデル DSタイプ リジットカップリング ご注文時の型式構成説明図

[SRG Model Structure and Materials]

*
Item Specifications
Hub Material Equivalent to S45C quenched and tempered steel
Hub Surface Treatment Blackening treatment
Pressure bolt material Structural alloy steel
Pressure bolt surface treatment Blackening treatment
Sleeve Material Equivalent to S45C quenched and tempered steel
Sleeve surface treatment Blackening treatment