The RIDGID 600-I hand-held power drive is used for service plumbing and pipe work where fast, consistent threads matter. Wear at the die head locking ring (or related retention parts) can show up as slipping, chatter, or difficulty keeping the die head secure-often repairable with the right replacement parts and proper lubrication/cleaning.
Repair makes sense when the motor is strong and the gearhead isn't noisy, because a refreshed die head interface can restore safe, accurate threading. Replacement becomes more likely if the gearhead bearings are failing, the forward/reverse switch is unreliable, or the tool has been overheated under heavy load, which can snowball into expensive drivetrain repairs.
Using a typical Home Depot price for a 600-I kit configuration, the repair threshold is about $881. If repair costs exceed that and reliability is mission-critical, replacement can protect job schedules and thread quality.