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Home Product 12*21*5 High Torque Stepper Motor, Compact Gearmotor for Robotics & CNC Machinery
12*21*5 (motor level)

12*21*5 High Torque Stepper Motor, Compact Gearmotor for Robotics & CNC Machinery

12x21x5 Flange Bearing
12x21x5 Motor Coupler
NEMA 17 Stepper Coupler
12*21*5 (motor level)
12x21x5 Flange Bearing and Motor Coupler designed for NEMA 17 Stepper Coupler applications, ensuring precise alignment and reliable power transmission in automation systems. Durable construction for smooth motor operation and long-term performance.
Categories:Power Transmission
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Product Description

The 12x21x5 Flange Bearing and 12x21x5 Motor Coupler are precision-engineered components designed for seamless integration with NEMA 17 Stepper Coupler systems. Featuring a compact 12x21x5 mm profile, this assembly provides robust torque transmission and alignment for stepper motors, supporting direct connection to drive modules without additional adapters. Operating within a voltage range of 12-24V DC and a temperature tolerance of -20°C to 85°C, it ensures reliability in industrial automation, CNC machinery, and robotics. The flange bearing design minimizes axial play, while the coupler's zero-backlash construction enhances positional accuracy. Ideal for applications requiring high-speed synchronization, its primary limitations include compatibility strictly with NEMA 17 motors and sensitivity to extreme vibration environments. Detection distance varies based on encoder pairing, typically optimized for 1-5mm proximity sensing.
Parameter Specification
Flange Outer Diameter 21mm
Flange Thickness 5mm
Motor Coupler Length 21mm
Motor Coupler Material Aluminum Alloy
NEMA 17 Torque Rating 40Ncm
Flange Bearing Type Sealed Deep Groove
Shaft Diameter 5mm
Coupler Bore Tolerance H7
Bearing Load Capacity 120N Radial
Mounting Hole Pattern M3x4 Holes
Step Angle (NEMA17) 1.8°
Operating Temperature -20°C to +80°C
question:Can the company ensure stable supply?
answer:Yes, we maintain consistent production and inventory to ensure reliable supply for all orders.
question:Why can other suppliers source discontinued models you cannot?
answer:We prioritize quality control and avoid obsolete or potentially counterfeit products to protect client interests.
question:Do you offer price discounts for bulk purchases?
answer:Custom pricing strategies are available for bulk orders, contact sales for tailored quotations.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:Can the company ensure stable supply?
answer:Yes, we maintain consistent production and inventory to ensure reliable supply for all orders.
question:Why can other suppliers source discontinued models you cannot?
answer:We prioritize quality control and avoid obsolete or potentially counterfeit products to protect client interests.
question:Do you offer price discounts for bulk purchases?
answer:Custom pricing strategies are available for bulk orders, contact sales for tailored quotations.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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