MACH-1 RACING // M81SR 55 KG SR SERIES DIGITAL PROGRAMMABLE SERVO

Working volatge:

4.8v through to 8.4v

Speed:

• 0.145sec/60° @ 4.8V
• 0.125sec/60° @ 6.0V
• 0.100sec/60° @ 7.4V 
• 0.087sec/60° @ 8.4V 

Stall Torque:

• 36 kg-cm (500 oz-in) @ 4.8V
• 43 kg-cm (597 oz-in) @ 6.0V
• 48 kg-cm (667 oz-in) @ 7.4V
• 55 kg-cm (750 oz-in) @ 8.4V 

Power Consumption Unloaded:

• 280mA @ 4.8v
• 320mA @ 6.0v
• 360mA @ 7.4v
• 400mA @ 8.4v

Power Consumption Loaded:

• 4600mA @ 4.8v
• 5400mA @ 6.0v
• 6200mA @ 7.4v
• 7000mA @ 8.4v

• Gears: Hardened Steel
• Motor: 4-Pole Brushless Motor
• Dead Band: 2 uSec
• Signal Range: 500 to 2500 uSec
• Bearing: 3 ball bearing
• Angle Sensor: Magentic angle sensor
• Size: 40*20*38mm (1.57 x 0.78 x 1.49 in)
• Weight: 83g 
• Connector Wire: 300mm / 22AWG

 

1. Warranty Coverage

All electronic servos purchased from us are supplied with the following warranty coverage:

• 12-Month No-Fault Warranty
  For the first 12 months from the date of purchase, we will repair or replace the servo regardless of the cause of failure, provided it has not been deliberately damaged or modified.

• 36-Month Manufacturer Fault Warranty
  For 36 months from the date of purchase, we will repair or replace any servo that fails due to a manufacturer defect, including component failures, workmanship issues, or internal electronic faults.

• What Is Not Covered

  • Intentional damage or misuse

  • Modification, disassembly, or alteration of the product

  • Water or chemical damage unless the product is explicitly rated for such exposure

  • Damage caused by using the servo outside the specifications published by the manufacturer

  • Normal wear and tear

2. Making a Warranty Claim

To make a warranty claim, the customer must:

• Provide proof of purchase; and

• Provide a description of the issue and any relevant information to allow assessment.

We may request the product be returned for inspection. If the claim is approved, we will repair or replace the product at no cost to the customer. If repair or replacement is not practicable, we may offer a refund in accordance with the Australian Consumer Law.

3. Customer Responsibilities

The customer is responsible for:

• Ensuring correct installation and operation of the servo

• Following all manufacturer instructions and specifications

• Returning the product to us (or an authorised service agent) for inspection if required

Postage costs for returning a product may be the customer’s responsibility unless required otherwise under the ACL.

4. Australian Consumer Law Notice

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

These rights exist in addition to the warranties offered by us.

5. How We Resolve Claims

Once a claim is submitted:

• We assess whether the issue falls under the 12-month no-fault warranty, the 36-month manufacturer-fault warranty, or the ACL consumer guarantees.

• Where a repair is possible, it will be carried out within a reasonable time.

• If repair is not possible, a replacement of equal or greater value will be provided.

• Refunds are offered only when required under the ACL (e.g., major failure).

6. Limitation of Liability

To the maximum extent permitted by law, we are not liable for:

• Damage caused by improper installation, incorrect voltage, or incompatible equipment

• Losses resulting from racing, competition use, or extreme overloading unless covered under the no-fault warranty period

• Consequential or indirect losses, except those required by the ACL