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17 mm ball joint for phone mounts (ball stud)
What size is the ball on a car phone mount? · Hardware · basis: The 17 mm ball is the de facto size of car and bike phone-holder ball joints, as named in maker listings (e.g. OOKWE's universal 17 mm ball head vent adapter) and community socket sets; no maker publishes the socket
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 4 in table
Notes
- Most clip-on car phone holders, vent clips, dashboard and suction bases join with a Ø17 mm ball on the base and a split socket with a screw collar on the phone head.
- File: a ball stud with the Ø17.0 ball (the interface) on a Ø8 neck and a Ø20 × 4 foot. The neck and foot are my design, to union onto your own base (a clamp ring, a vent clip, a plate).
- The socket side (its split, the collar thread and the cup depth) is not published by any maker I found and is not drawn. A socket is sized to grip Ø17.0.
- This is not the 1 in (25.4) ball of RAM-style B-size mounts: see ram-mount-ball-sizes.
Sizes
| feature | mm | from |
|---|---|---|
| ball | Ø17.0 | maker listings (OOKWE), community socket sets |
| neck | Ø8 | my design |
| foot | Ø20 × 4 | my design |
| socket, collar thread | not published | — |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| ball | Ø17.0 | phone-head split socket with a screw collar | socket | ball-stud-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| OOKWE (listing by Walmart) | Car air vent mount clip adapter, universal 17 mm ball head | web | reference verify |
| MakerWorld (community) | Ball joint socket set for phone mounts (17 mm), described as the industry-standard 17 mm ball system | STL/3MF | varies per upload verify |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| ball-stud-17 | 17 mm ball stud: Ø17.0 ball on a Ø8 neck (neck 6 clear below the ball) on a Ø20 × 4 foot; ball centre 17.500 above the foot face. Ball exact; neck and foot are my design | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=phone-mount-ball-17mm
How it fits
Goes in or on
Handlebar clamp ringsunion onto a bar clampCar air vent slatson a vent clipAlternatives
RAM-style mount ball sizes1 in RAM-style B ball for heavier headsYou might also need
Questions
What size is the ball on a car phone holder?
17 mm on most clip-on and vent phone holders; the phone head's socket grips the Ø17 ball.
Is the 17 mm ball the same as a RAM ball?
No: RAM B-size balls are 1 in (25.4 mm). See ram-mount-ball-sizes.
Can I put a 17 mm ball on a bike bar?
Yes: union the stud onto a handlebar-clamp-rings ring for your bar Ø.