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View compareFrequently Asked Questions
- Q: What material is this coupler sleeve made of? A: This coupler sleeve is made of stainless steel. The use of stainless steel increases wear resistance and ensures a longer lifespan.
- Q: What are the dimensions of the coupler sleeve? A: The inner diameter is three point one seven millimeters, and the outer diameter is five millimeters. The length of the sleeve is twelve point two millimeters.
- Q: How many sleeves are included in the package? A: The package includes three sleeves. Additionally, it comes with one L-shaped Allen key and ten M4 set screws.
- Q: How do I install this coupler sleeve? A: To install the coupler sleeve, slide it onto the motor pinion shaft and secure it with the provided set screws. Ensure it fits snugly to prevent slipping.
- Q: Is this coupler sleeve compatible with all RC motors? A: This coupler sleeve is designed for specific RC motors, particularly those with pinion apertures of five millimeters or three point one seven millimeters. Check your motor specifications for compatibility.
- Q: Can I use this coupler sleeve for different gear sizes? A: Yes, this coupler sleeve allows conversion between pinion apertures of five millimeters and three point one seven millimeters. It can accommodate various pinion gear sizes.
- Q: How do I keep the coupler sleeve in good condition? A: To maintain the coupler sleeve, keep it clean and free of debris. Regularly check for any signs of wear and ensure it is securely fastened during use.
- Q: Is it safe to use this coupler sleeve with high-speed motors? A: Yes, this coupler sleeve is designed to handle the demands of high-speed motors. Its durable stainless steel construction ensures stability and reliability.
- Q: What should I do if the coupler sleeve doesn't fit? A: If the coupler sleeve does not fit, double-check the specifications of your motor pinion. Ensure you are using the correct diameter and length for compatibility.
- Q: Does this product come with a warranty? A: Yes, HOPLEX provides a warranty for this coupler sleeve. For detailed warranty information, please refer to the manufacturer's guidelines.
- Q: How do I contact customer service for support? A: You can contact HOPLEX customer service anytime, as they offer twenty-four seven support. Reach out via the contact information provided in the product packaging.
- Q: Can I return the coupler sleeve if it's not what I expected? A: Yes, you can return the coupler sleeve if it does not meet your expectations. Be sure to check the return policy provided by the retailer.
- Q: Is this coupler sleeve suitable for beginners? A: Yes, this coupler sleeve is user-friendly and suitable for beginners. Its easy installation process makes it accessible for those new to RC motors.
- Q: How do I prevent the coupler sleeve from slipping during use? A: To prevent slipping, securely tighten the set screws that come with the coupler sleeve. Ensure it is properly installed on the motor pinion shaft.
- Q: What is the color of the coupler sleeve? A: The coupler sleeve is silver in color. This finish is typical for stainless steel products, providing both aesthetic appeal and durability.

