Motor-mount plate for a 2 in tri-clamp cross: clamps between two faces, holds a 2208 gimbal motor inside — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-motor-mount-plate/  (CC BY 4.0)
Basis: ISO 2852 face and 20° back on both sides as the clamp-in bearing plate on this site (16 mm face to face for two standard clamps); motor base holes (4-M3 on 19 × 16) from the 2208 listing; ISO 273 medium clearance for M3 and ISO 10642 countersink (90°, Ø6)
Catalog version: 2026-10-20

Sizes: see table below
- A ring clamped between the cross's top face and the port cap, like a thick gasket, each side its own Type B gasket and clamp. Its Ø30 bore lets the gas and the motor's three leads through to the port cap.
- From the ring a column hangs down the cross's top run to a mount face 62.1 mm below the plate. The motor's base bolts to it with four M3 × 6 countersunk screws whose heads sit flush, because the top run leaves no room for heads behind the face. The holes follow the motor's 16 and 19 mm pairs, turned 45° so the face stays inside the Ø47.5 bore.
- Everything stays inside the bore and inside the gasket lip (Ø45.3) where it passes the joint. The motor hangs over the crank, its axis parallel to the crankshaft, its pinion in mesh with the crank gear.

feature  value
faces  ISO 2852 both sides, 2 in
face to face  16.0
bore  Ø30
column  x 6–21, |y| ≤ 7
mount face  3 thick, |y| ≤ 12, 4 × Ø3.4 csk Ø6 × 90°
motor axis below the inner face  62.1

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf
- ASME: BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment
- ISO: ISO 273 clearance holes for bolts and screws (fine / medium / coarse) — standard — dimensions are facts [verify license at link] — https://www.iso.org/standard/4196.html
- GetFPV (product listing): Tiger GB2208-80 gimbal motor: 27.5 × 23, 4.5 hollow shaft, stator 4-M3 on 19 × 16, rotor 4-M2 on 12 × 12 — web — vendor page; dimensions are facts [verify license at link] — https://www.getfpv.com/tiger-gb2208-80-brushless-gimbal-motor-hollow-shaft.html
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/tri-clamp-motor-mount-plate/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-motor-mount-plate