This is the Ametek Lamb carbon brush assembly, part 33384, for Ametek Lamb vacuum motors. Carbon brushes are the sacrificial contact that carries current into a universal motor's commutator. They wear down by design, and when they wear out the motor loses power, sparks, or simply stops. Replacing brushes is the single most common and least expensive way to bring a still-good vacuum motor back into service, and it is far cheaper than a motor. The assembly includes the brush housing and the interrupter, not just the carbon itself.
Specifications
- Part number: 33384
- Includes: carbon brush, housing and interrupter
- Housing color: green
- Sold as a pair under part number 33384; the related part number 33384-1 is sold singly
- Wear limit: replace when the carbon is shorter than 3/16 inch
Brush dimensions are published by only one distributor and are not corroborated, so they are not stated here. No manufacturer documentation for this part number was located; the information above comes from motor parts distributors.
Fits
Distributor cross-reference lists agree on Ametek Lamb motor 116311-00. Also listed across multiple distributors: 115744, 115826, 115894, 115909, 115982, 116024-13, 116025-13, 116039-13, 116049-13, 116116-00, 116181-00, 116196-00, 116266-00, 116311-01, 116311-20, 116320-00, 116359-00, 116367-00, 116392-00, 116392-01, 116392-29, 116392-32, 116392-42, 116448-00, 116457-00, 116457-50, 116459-50, 116493-50, 116669-20, 116757-00, 116757-29, 116883-00, 116883-50, 116905-13, 117075-50 and 117812-50.
Distributor lists for this part disagree on one further motor number, and that number is therefore not included above. Confirm fitment against the motor's own nameplate before ordering. The Ametek Lamb model number is stamped or labeled on the motor housing itself, not on the vacuum.
Service note
Brushes wear as a set. Replace both at the same time and inspect the commutator surface while the motor is open. Disconnect power before service.
Discount Cleaning Products is an authorized dealer with US-based service and support.
