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121, 122, 125 datasheets

121, 122, 125 datasheets

121, 122, 125 datasheets

Product catalog summary
Specifications Overview
The datasheet provides detailed specifications for electromagnetic clutches and brakes, focusing on models 121-20G, 122-20G, and 125-12G. Key parameters include dynamic and static friction torque, coil voltage, wattage, current, resistance, heat resistance class, maximum rotation speed, and mass. The dynamic friction torque is measured at a relative speed of 100 min-1.

Model Specifications
  • 121-20G Series: Features a through-shaft construction with an open-disc brake system. Models range from size 06 to 25, with dynamic friction torque from 5 to 320 N·m and static friction torque from 5.5 to 350 N·m. The maximum rotation speed is 3000 min-1 for most models, with a heat resistance class of B.
  • 122-20G Series: Double clutch/brake units with similar specifications to the 121 series but with different dimensions and mass. The maximum rotation speed is also 3000 min-1, with a heat resistance class of B.
  • 125-12G Series: Butt shaft construction, drip-proof type. Models range from size 05 to 16, with dynamic friction torque from 2.4 to 80 N·m. The maximum rotation speed is 3000 min-1, with a heat resistance class of B.

Dimensions
The datasheet includes detailed dimensions for each model size, covering parts and shaft dimensions. Key dimensions include A1, A2, B1, B2, C, D, E, F, G, H, J, K, L, Z1, Z2, Q, S, U, V, and W.

Installation and Ordering
The document provides guidelines for installing pulleys onto input/output shafts, recommending the use of the supplied insertion set. It also includes ordering information for each model size, specifying the necessary part numbers and configurations.
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Catalog excerpts

121, 122, 125 datasheets-1

ELECTROMAGNETIC CLUTCHES AND BRAKES CLUTCH/BRAKE UNITS/Through-shaft construction, open-disc brake system type ■ Specifications Coil [at 20 ℃] Total work Torque Max. Rotating part Torque Armature Heat performed until build-up decrease Mass rotation moment of readjustment of pull-in time Wattage Current Resistance resistance speed time inertia time [kg] ta [s] class the air gap [W] [A] [Ω] tp [s] [min-1] J [kg·m2] td [s] ET [J] Dynamic friction torque Td[N·m] Static friction torque TS[N·m] • The dynamic friction torque, Td, is measured at a relative speed of 100 min-1. • The input/output shaft keyways are old JIS standard class 2 while the key is old JIS standard class 1. • When inserting pulleys or the like onto input/output shafts, use the supplied insertion set. • The 121-25-20G base is a casting.

 Open the catalog to page 1
121, 122, 125 datasheets-2

ELECTROMAGNETIC CLUTCHES AND BRAKES DOUBLE CLUTCH / BRAKE UNIT ■ Specifications Model Coil [at 20 ℃] Dynamic Static Heat friction friction resistance torque Td torque TS Voltage Wattage Current Resistance class [V] [W] [A] [Ω] [N·m] [N·m] Rotating part moment of inertia J [kg·m2] Total work performed until readjustment of the air gap ET [J] Armature pull-in time ta [s] Torque build-up time tp [s] Torque decrease time td [s] • The dynamic friction torque, Td, is measured at a relative speed of 100 min . -1 • The input/output shaft keyways are old JIS standard class 2 while the key is old JIS standard...

 Open the catalog to page 2
121, 122, 125 datasheets-3

ELECTROMAGNETIC CLUTCHES AND BRAKES CLUTCH / BRAKE UNITS Butt shaft construction, drip-proof type ■ Specifications Dynamic Static Coil [at 20 ℃] Heat friction friction resistance torque Td torque TS Voltage Wattage Current Resistance class [V] [W] [A] [Ω] [N·m] [N·m] Rotating part Total work moment of performed until inertia readjustment of J [kg·m2] the air gap ET [J] Torque build-up time tp [s] Armature pull-in time ta [s] Torque Mass decrease [kg] time td [s] C: 0.040 B: 0.012 C: 0.020 B: 0.015 C: 0.030 B: 0.025 C: 0.050 B: 0.030 C: 0.065 B: 0.050 C: 0.085 B: 0.055 • The dynamic friction torque,...

 Open the catalog to page 3

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.