Brake Caliper Piston Separator AWTools AW18810BL — for disc calipers 0–65 mm

The AWTools AW18810BL brake caliper piston separator is a mechanical tool designed for disc brake calipers with a piston spread range of 0–65 mm. It provides a controlled method to retract or separate caliper pistons during brake pad replacement and general brake system service. Constructed to be used in workshops or for DIY maintenance, this separator helps ensure even piston movement and facilitates correct pad seating without risking piston or caliper damage.

Advantages

This brake caliper piston separator offers precise adjustment across a 0–65 mm range, enabling compatibility with a wide variety of disc calipers. Its mechanical design delivers steady, controlled force for piston retraction to avoid sudden movement or misalignment. The tool's construction provides reliable grip and stable operation during service tasks, reducing the chance of damage to pistons, seals, or pads. It is compact and suitable for both professional and home use where space and access may be limited.

Suitable for

• Piston retraction when replacing brake pads on disc brakes with pistons up to 65 mm apart
• Routine brake maintenance and inspection in workshops and home garages
• Controlled separation of caliper pistons to check seals and piston surfaces

Key specifications

• Piston spread range: 0–65 mm
• Application: disc brake calipers
• Function: mechanical piston retraction/separation for safe pad installation
• Design: compact hand tool suitable for confined spaces

How to use

Position the separator so its contacting faces align with the caliper pistons or piston surfaces and adjust the tool to the minimum opening before engagement. Turn the adjustment mechanism gradually to apply steady pressure and push the pistons back evenly into the caliper housing until there is sufficient clearance for new pads. Monitor piston movement to ensure even retraction and stop immediately if resistance or unusual binding occurs. After pad installation, remove the tool and check piston and seal condition before reassembling the caliper.

Usage recommendations

Use clean brake fluid and follow vehicle manufacturer guidance when retracting pistons, and always inspect piston seals and boot covers for damage. Wear protective gloves and eye protection during service. If a piston does not move smoothly or exhibits corrosion, do not force it; consult a professional technician to avoid further damage.