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V-Slot wheels and eccentric spacers: Delrin mini, Delrin and solid V wheels, 625 and 105ZZ bearings, 7.12 mm spacer hole

What are the OD, width, bore and bearing of OpenBuilds-style V-Slot wheels, and what hole does an eccentric spacer need? · Standard part · basis: OpenBuilds Part Store kit pages (mini, Delrin), retailer kit pages (Rat Rig, MakerTechStore, Reach.dog, Grobotronics) and OpenBuilds' bearing page; numbers only. The wheel groove angle and depth are not published in any page read, so no wheel is drawn

Also called: openbuilds v wheel dimensions, mini v wheel od 15.23, v wheel bore 15.974, delrin v wheel 23.9 mm, eccentric spacer hole 7.12 mm, mini v wheel bearing size, openbuilds solid v wheel bearing 625, eccentric spacer adjustment range, 105zz bearing 5x10x4

Exact dimensions. True size, with no tolerance added.

sizes: 7 in table

Notes

Rows give outside diameter, thickness ('Thick' on the kit page), the wheel's bore (the seat that holds the two bearings, with the printed tolerance), the bearings and shims in the kit, and the material. The Delrin Mini wheel is 15.23 x 8.8 mm with a 9.974 ± 0.026 mm bore (it holds a Ø10 bearing); the Delrin V wheel is 23.90 x 10.23 mm with a 15.974 ± 0.026 mm bore (it holds two Ø16 625 bearings). OpenBuilds prints 23.90 mm for the V wheel; the page bearing-housings-and-rod-supports prints 23.89, so both are shown.
The mini kit page does not name its bearing; OpenBuilds sells a 105ZZ 5 x 10 x 4 mm mini bearing (OD 10, ID 5, 4 thick, 168 N dynamic, 430 N static load rating), but its compatibility field is blank, so it is listed as a sold part, not as the kit's bearing. Rat Rig's mini kit adds 'M5 lock nut and M5 x 25 mm low-profile screw' and a 1/4 in aluminium spacer; MakerTechStore's page prints the same three wheel numbers for the Delrin and the Xtreme mini.
Eccentric spacers: OpenBuilds prints a 5 mm bore, a rim that 'fits into a 7.12 mm hole', a 6 mm (or 1/4 in) cam height and up to 1.5 mm of off-centre adjustment; the Grobotronics mini spacer prints a 6 mm height, a 5 mm bore, a 7.12 mm hole and 'approx 0.79 mm' of adjustment, and mentions a 10 mm flange. The spacer's outside diameter, hex size and thread are not printed by any page read. The 7.12 mm hole agrees with the Ø7.1 on bearing-housings-and-rod-supports.
Not here: the V angle and groove depth of the wheels (no page read prints them), the solid wheel's OD and width (the Solid V kit page read does not print them), and bearing models for the mini wheel. McMaster-Carr has no V-Slot wheels; its T-slotted framing category is linked as the nearest family.

V-Slot wheels and eccentric spacers: Delrin mini, Delrin and solid V… size chart

part	OD (mm)	width / height (mm)	bore (mm)	bearing	shims / adjustment	material
Delrin Mini V wheel (OpenBuilds kit 495)	15.23	8.8	9.974 ± 0.026	2 mini ball bearings (model not printed on the kit page); OpenBuilds sells a 105ZZ 5 x 10 x 4 separately	2 precision shims (Rat Rig: 1 mm each)	Delrin, M80, 63 MPa
Xtreme Mini V wheel	15.23	8.8	9.974 ± 0.026	not printed	not printed	polycarbonate (clear), M75, 86 MPa
Delrin V wheel (OpenBuilds kit 500)	23.90 (OpenBuilds page); 23.89 on bearing-housings-and-rod-supports	10.23	15.974 ± 0.026	2 x 625 2RS (bearing ID 5 mm)	2 x 5 mm precision shim	Delrin, M80, 63 MPa
Solid V wheel (OpenBuilds kit 480)	not printed	not printed	not printed	2 x 625 2RS	2 x 5 mm precision shim	not printed
— eccentric spacer, standard (OpenBuilds V7)	—	cam height 6 mm or 1/4 in	bore 5 mm; rim fits a 7.12 mm hole	—	up to 1.5 mm off-centre	stainless steel
— eccentric spacer, mini (Grobotronics)	10 mm flange as printed (not labelled as OD)	height 6 mm	bore 5 mm; fits a 7.12 mm hole	—	about 0.79 mm adjustment range	—
— bearing 105ZZ (OpenBuilds)	10	4	ID 5	Cr 168 N, Cor 430 N	sealed, shielded	chrome steel

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

OpenBuilds Part Store	Delrin Mini V Wheel Kit: OD 15.23 mm, thick 8.8 mm, ID 9.974 ± 0.026 mm, M80, 63 MPa; kit has 2 mini ball bearings, 2 precision shims, lock nut	web	Maker page; numbers only
OpenBuilds Part Store	Delrin V Wheel Kit: OD 23.90 mm, thick 10.23 mm, ID 15.974 ± 0.026 mm, 2 x 625 2RS (bearing ID 5 mm), 2 x 5 mm precision shim	web	Maker page; numbers only
OpenBuilds Part Store	Eccentric Spacer (V7): 6 mm or 1/4 in cam height, 5 mm bore, rim fits a 7.12 mm hole, up to 1.5 mm off-centre adjustment	web	Maker page; numbers only
OpenBuilds	Mini Ball Bearing 105ZZ 5x10x4: OD 10, ID 5, thickness 4 mm, Cr 168 N, Cor 430 N	web	Maker page; numbers only
Rat Rig	Mini V Wheel Kit: OD 15.23, thick 8.8, bore 9.974 ± 0.026; 2 mini V bearings, 2 x 1 mm shims, M5 lock nut, M5 x 25 mm screw	web	Retailer page; numbers only
MakerTechStore	Mini Solid V Wheel kits: Delrin (black, M80, 63 MPa) and Xtreme polycarbonate (clear, M75, 86 MPa), both OD 15.23, thick 8.8, ID 9.974 ± 0.026	web	Retailer page; numbers only
Grobotronics	OpenBuilds Eccentric Spacer Mini: height 6 mm, bore 5 mm, fits a 7.12 mm hole, about 0.79 mm adjustment range, 10 mm flange	web	Retailer page; numbers only
Reach.dog (MakerParts US)	Solid V Wheel Kit: 2 x 625 2RS bearings, 2 x 5 mm precision shim, nylon lock nut (no wheel OD or width printed)	web	Retailer page; numbers only
McMaster-Carr	T-slotted framing (McMaster lists no V-Slot profile or V-wheel; this is the nearest family) (free STEP/IGES per part, for your own design use; no redistribution)	STEP, IGES, PDF	McMaster-Carr site terms: personal design use, no redistribution verify

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.

Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=v-slot-wheels-eccentric-spacers

Schematic, not to scale.