Kelly box pins: 50 mm and 60 mm dimensions explained
Kelly box pins retain the connection according to the tool's designed assembly. Pin selection must account for mating holes, useful engagement and retention details. A matching shaft diameter alone does not establish that a pin is suitable for the connection.
Kelly Box Pins
How to specify the right configuration
The two listed combinations are OD 50 mm × length 320 mm and OD 60 mm × length 400 mm. Keep diameter and length paired when requesting a quote. Identify hole-center locations, retention features and whether the stated length is overall or functional in the required drawing.
Catalog specifications and listed options
Kelly box pins in outside diameters of 50 or 60 mm and corresponding lengths of 320 or 400 mm. Confirm the pin hole position and rig/tool interface before ordering.
- OD 50 mm × Length 320 mm
- OD 60 mm × Length 400 mm
Assembly review and inspection
Send the tool and Kelly box drawing alongside the existing pin photo. Ask the responsible team to confirm material and acceptance requirements. Inspect hole wear and retention components as well as the pin; a replacement pin cannot restore a damaged mating box by itself.
Which pin diameter and length combinations are listed?
The listed combinations are 50 mm outside diameter × 320 mm length, and 60 mm × 400 mm. Confirm hole position and the rig/tool interface rather than mixing dimensions between options.
Preparing a quotation request in Saudi Arabia
- Identify the rig model, product, quantity and application; include the ground profile when specifying a cutting tool.
- Send a dimensioned drawing or clearly scaled photos. Identify mating components and distinguish measured dimensions from estimates.
- State the delivery city, required date and project documentation requirements. Confirm the included components before ordering.