3dfindit

free

Mandrel MAXXOS

...mandrel maxxos 3dfind.it catalog: hainbuch

thingiverse

free

Mandrel Stand by whtbearfan

...2.5, 3.0 3.5, etc.). i made it stair stepped for ease of pulling the middle mandrels out. actually printed on a da vinci jr. 1.0

free3d

free

Floor cone mandrel v1

...floor cone mandrel v1 free3d floor cone mandrel v1 printable, low poly model.

3dfindit

free

Mandrel MANDO G

...mandrel mando g 3dfind.it catalog: hainbuch

3dfindit

free

Mandrel MANDO T211

...mandrel mando t211 3dfind.it catalog: hainbuch

3dfindit

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Mandrel MANDO T212

...mandrel mando t212 3dfind.it catalog: hainbuch

3dfindit

free

Mandrel MANDO T812

...mandrel mando t812 3dfind.it catalog: hainbuch

thingiverse

free

Finocyl Mandrel

...finocyl mandrel thingiverse for use as a mold to grain finocyl kernel core from rockets engine.

thingiverse

free

Ring Mandrel 14-24mm by wolfskrim

...ring mandrel 14-24mm by wolfskrim thingiverse it's a ring mandrel for making or polish ring

thingiverse

free

180° Pipe Bending Mandrel by arshan2998

...0° bend in rigid acrylic tubing with a maximum outer diameter of 15mm. 2.5mm holes so the mandrel can be screwed onto a worktop

thingiverse

free

Ring Mandrel by bruxsa

...ld take any size ring. requires live center to apply pressure. might modify this in future but at the moment this should suffice.

thingiverse

free

Mandrel Bearing Mount by Mr_Vigil

...mandrel bearing mount by mr_vigil thingiverse mount to t-bar

thingiverse

free

30cm Rifling Mandrel-9x19 by Untangle

...ieces were you can use 2 pieces of 1.75mm filament to make a strong rifling mandrel see the installation picture for more details

thingiverse

free

Ring Mandrel/Sizer by stormsomething

...whole thing for taller printers. the other has it split into a 5 to 8 piece and a 9 to 12 piece for printing on shorter printers.

thingiverse

free

Ring Mandrel Holder, remixed to make it taller by chriscbnss

... i got from patrick adair designs just right. if it is tight for your mandrel, scale it up just a couple of % or sand the inside.

thingiverse

free

Boxford mandrel sun gear CAD file. STEP and STL. by Steveo77

...boxford mandrel sun gear cad file. step and stl. by steveo77 thingiverse boxford planet gear to fit gear end of mandrel.

thingiverse

free

Boxford mandrel sun gear CAD file. STEP and STL. by Steveo77

...boxford mandrel sun gear cad file. step and stl. by steveo77 thingiverse stl and step file for a sun gear for a boxford mandrel.

thingiverse

free

Ring Mandrel by rickos

...urning chuck or alike to fasten to lathe. should aalso be used with a live tale stock. the tip is a aid for some live tail stocks

3dfindit

free

Mandrel actuating units ms dock / hs dock

...mandrel actuating units ms dock / hs dock 3dfind.it catalog: hainbuch

thingiverse

free

Mandrel Holder by Evaunit4

... printers as well just put it on its back to keep the hole from requiring any supports. would love to see pictures of your prints

thingiverse

free

Ring Expansion Mandrel for the Lathe (WIP) by YeEpicTroll

...ng nut. print / use this on a lathe at your own risk! (4/7/18): reduced length of clamp, increased hole size to fit the nut/ bolt

3dfindit

free

Blind rivet round pan head, sleeve: aluminium, mandrel: aluminium

...blind rivet round pan head, sleeve: aluminium, mandrel: aluminium 3dfind.it catalog: wuerth

thingiverse

free

30 Facet Globe Knot Mandrel by allwinedesigns

...mmend printing the pin laying down as it can break easily in the holes if printed vertically. wood dowels are even more reliable.

thingiverse

free

Ring Mandrel for wire wrapping jewelry by OpenSourceClassroom

...& 2) even ring sizes 4, 6, 8, 10, 12. this device will help you tie the wires for various ring sizes with precision. enjoy!

thingiverse

free

Mandrel set for pouring a rocket engine heater grain by seeyainthex

...andrel set for pouring a rocket engine heater grain by seeyainthex thingiverse i use these at work to pour rocket engine parts.

3dfindit

free

All-purpose rivet with round pan head, sleeve: aluminium, mandrel: aluminium

...all-purpose rivet with round pan head, sleeve: aluminium, mandrel: aluminium 3dfind.it catalog: wuerth

thingiverse

free

Hard Tube Tube Bending Mandrel Kit 10-16mm

...ter and includes 180, 90 and 45 degree angles. should be fairly easy to print. i do other shapes angles and diameters for tips ;)

thingiverse

free

Chess Piece Mandrel for Lathe (MT2 taper) by hbutler

...ght sanding. designed in autodesk inventor. i've included the .ipt files as well if you want to have a go at modifying them.

thingiverse

free

Fiber Optic Cable .7" 5 Turn Mandrel

...sualizing the actual mandrel products you can order online. we needed it "to-now!" hope this helps someone in a pinch.

3dfindit

free

Blind bucket rivet, round pan head, sleeve: copper, mandrel: bare steel

...blind bucket rivet, round pan head, sleeve: copper, mandrel: bare steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: bare copper, mandrel: bare bronze

...blind rivet, round pan head, sleeve: bare copper, mandrel: bare bronze 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, 120° countersunk head, sleeve: aluminium, mandrel: A2 stainless steel

...blind rivet, 120° countersunk head, sleeve: aluminium, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind bucket rivet, round pan head, sleeve: aluminium, mandrel: bare steel

...blind bucket rivet, round pan head, sleeve: aluminium, mandrel: bare steel 3dfind.it catalog: wuerth

thingiverse

free

Mandrel for hoop earrings by Ozcymm

...s will work for a few sets as i'm not looking to become a professional jeweler. it is 50mm at one end and 10 mm at the other.

3dfindit

free

High-strength blind rivet with round pan head, sleeve and mandrel made from aluminium

...high-strength blind rivet with round pan head, sleeve and mandrel made from aluminium 3dfind.it catalog: wuerth

3dfindit

free

Blind bucket rivet, round pan head, sleeve: copper, mandrel: A2 stainless steel

...blind bucket rivet, round pan head, sleeve: copper, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind bucket rivet, round pan head, sleeve: aluminium, mandrel: A2 stainless steel

...blind bucket rivet, round pan head, sleeve: aluminium, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet with large round pan head, sleeve: aluminium. mandrel: A2 stainless steel.

...blind rivet with large round pan head, sleeve: aluminium. mandrel: a2 stainless steel. 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet with large round pan head, sleeve: aluminium. mandrel: A2 stainless steel.

...blind rivet with large round pan head, sleeve: aluminium. mandrel: a2 stainless steel. 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, mushroom head, sleeve: aluminium, brown, anodised, mandrel: A2 stainless steel

...blind rivet, mushroom head, sleeve: aluminium, brown, anodised, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

thingiverse

free

3 Part x 5 Bight Turk's Head Knot Mandrel by allwinedesigns

...mmend printing the pin laying down as it can break easily in the holes if printed vertically. wood dowels are even more reliable.

3dfindit

free

Blind rivet grooved rivet shank, sleeve: aluminium, mandrel: galvanised steel, blue passivated (A2K)

...blind rivet grooved rivet shank, sleeve: aluminium, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: aluminium, mandrel: galvanised steel, blue passivated (A2K)

...blind rivet, round pan head, sleeve: aluminium, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: A2 stainless steel, mandrel: A2 stainless steel

...blind rivet, round pan head, sleeve: a2 stainless steel, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: A4 stainless steel, mandrel: A4 stainless steel

...blind rivet, round pan head, sleeve: a4 stainless steel, mandrel: a4 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: A2 stainless steel, mandrel: A2 stainless steel

...blind rivet, round pan head, sleeve: a2 stainless steel, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet round pan head, sleeve: aluminium, painted white, mandrel: A2 stainless steel

...blind rivet round pan head, sleeve: aluminium, painted white, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: copper, mandrel: galvanised steel, blue passivated (A2K)

...blind rivet, round pan head, sleeve: copper, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: A2 stainless steel, mandrel: A2 stainless steel

...blind rivet, round pan head, sleeve: a2 stainless steel, mandrel: a2 stainless steel 3dfind.it catalog: wuerth

thingiverse

free

Spring Winder (6 mm & 8 mm mandrels) by bebenlebricolo

...all the pieces nice and clean (small files and 1mm drill bit are highly recommended!) limited to 1mm diameter wire at the moment.

3dfindit

free

Blind rivet with large round pan head, sleeve: aluminium. mandrel: galvanised steel, blue passivated (A2K)

...d rivet with large round pan head, sleeve: aluminium. mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet with countersunk head, 120 degrees, sleeve: aluminium, mandrel: galvanised steel, blue passivated (A2K)

...ith countersunk head, 120 degrees, sleeve: aluminium, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

thingiverse

free

CNC 2418/3018 4th Axis and Ring Engraving Mandrel by jpoles1

...per motor to mount 2x m3-20mm screw for axles on steady rest https://blog.jpoles1.com/wp-content/uploads/2021/02/ring-engrave.mp4

thingiverse

free

KTM/HQV 450/500 Marking Mandrel Pt.# 78129032000 by SajeOne

...dencies: threadlib: https://github.com/adrianschlatter/threadlib knurled surface library: https://www.thingiverse.com/thing:32122

3dfindit

free

Blind rivet, round pan head, sleeve: Al-Mg 2.5, mandrel: galvanised steel, blue passivated (A2K)

...blind rivet, round pan head, sleeve: al-mg 2.5, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: Al-Mg 2.5, mandrel: galvanised steel, blue passivated (A2K)

...blind rivet, round pan head, sleeve: al-mg 2.5, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

thingiverse

free

Ring Mandrel, Single Size 0 - 13.5 (US & Canada) by KushKing420Weed

...d corresponding the sizes found on the chart on this website: "http://www.ringsizes.co/" created on autodesk tinkercad.

thingiverse

free

NEJE (Or Others) MINI Laser Pen Mandrel Rotary Jig by pmbroth

... this with 30% fill and at .24 layer you can adjust this for different needs by shrinking or expanding the height when printing..

3dfindit

free

High-strength blind rivet with round pan head, sleeve and mandrel made from blue passivated (A2K) galvanised steel

...h blind rivet with round pan head, sleeve and mandrel made from blue passivated (a2k) galvanised steel 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: AI-Mg aluminium 2.5. mandrel: galvanised steel, blue passivated (A2K)

...d rivet, round pan head, sleeve: ai-mg aluminium 2.5. mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet with large round pan head, sleeve: aluminium, painted black. mandrel: galvanised steel, blue passivated (A2K)

...rge round pan head, sleeve: aluminium, painted black. mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

thingiverse

free

21st Century Shooting Expanding Mandel Set Organizer by koksala

...one expanding mandrel die body and 20 ea. expander mandrel and will work with any size mandrel currently available...

3dfindit

free

Blind rivet, round pan head, sleeve: galvanised steel, blue passivated (A2K), mandrel: galvanised steel, blue passivated (A2K)

...ead, sleeve: galvanised steel, blue passivated (a2k), mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: galvanised steel, blue passivated (A2K), mandrel: galvanised steel, blue passivated (A2K)

...ead, sleeve: galvanised steel, blue passivated (a2k), mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, head painted, sleeve: Al-Mg 2.5, mandrel: galvanised steel, blue passivated (A2K)

...vet, round pan head, head painted, sleeve: al-mg 2.5, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

3dfindit

free

Blind rivet, round pan head, sleeve: galvanised steel, blue passivated (A2K), mandrel: galvanised steel, blue passivated (A2K)

...ead, sleeve: galvanised steel, blue passivated (a2k), mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

thingiverse

free

K8200/3Drag ZAxis with one M8 and one M5 mandrels by frolinux

... break now. that's the reason why there is so much tape in the printer. but the printing quality is much better with a case.

thingiverse

free

Universtal Expanding Ring Mandrel by cgcrute

...t's a snug fit. pla may warp if your blanks gets too hot whilst sanding, petg is a better choice. wet sanding stops this too.

thingiverse

free

ring sizer metal ring strainer Measuring finger ring with mandrel ring Measuring finger sizer measuring accessory by JFR3DPRINT

...sory 0 x 24 calibrador de anel de metal anel de medição de dedo com anel de mandril sizer de dedo de medição acessório de medição

3dfindit

free

Blind rivet, round pan head, sleeve: Al-Mg aluminium 2.5, black anodised, mandrel: galvanised steel, blue passivated (A2K)

...an head, sleeve: al-mg aluminium 2.5, black anodised, mandrel: galvanised steel, blue passivated (a2k) 3dfind.it catalog: wuerth

thingiverse

free

V3 inspired v2 Rifling Mandrel - Wire Based Progressive Twist (50-10) 4.5in 8.82mm ID Barrel by Untangle

... that are needed to do this upside down with ivan’s rifling mandrel - wire based progressive twist (50-10) 4.5in 8.82mm id barrel

thingiverse

free

14mm OD Hard Tubing Bend Mandrel by icase81

... some point, so it may not be the best design. i've included the .step so you can do whatever you want with it. best of luck!

thingiverse

free

Grinder Base Attachment for Dremel Mandrel 402 by totembe

... grinder base with a strong glue. with a weak glue like pritt, you can glue your grinding paper. while printing do not use shell.

thingiverse

free

NEJE 1500 7mm Jig by 2T3Custom

...pen on 7mm mandrel, tape the pen bushings and mandrel together on at least one side. both is better...

thingiverse

free

Dremel tip Organizer by StadinTech

...thingiverse organizer for 63 tips, cut and polisher discs, mandrel key and tip...

thingiverse

free

30 Facet Globe Knot by allwinedesigns

...continuous strand. you can tie your own using a mandrel that i...

3dcadbrowser

free

Expanding MandrelFree

...ool core.this 3d object can be downloaded in .max, .obj, .3ds, .fbx, .dxf, .lwo, .stl, .wrl, .ma, .dae, .x and .asc file formats.

thingiverse

free

Spring Tool - make your own springs

...the screw is for moving the wire around the mandrel note be careful and wear safety goggles before using...

thingiverse

free

Print Flat Bracelet System by damauk

...system consists of the following parts: -sizing chart -sizing mandrel -print flat bracelets i have included six sizes of...

thingiverse

free

Distance rings for penturning (customizable) by WayofWood

...can be used to turn a pen on a mandrel see this article and video for an example how...

thingiverse

free

OpenScad Spring Winder. by ckirby

...holes in the base and the handle insert a mandrel clamp it down wind some springs ??? profit!...

thingiverse

free

Drying rack for Baroque Bassoon reeds by RexConstenla

...specially modeled according to georg rieger's baroque bassoon reed's mandrel if anyone prints this, don't hesitate to notify me...

thingiverse

free

Paper Cartridge Forming Tool

...powder cartridges for revolvers. the default dimensions for this mandrel were taken from a video on youtube by...

thingiverse

free

Ring supplies holder by Kawadarze

...ring supplies holder by kawadarze thingiverse holder for ring mandrel vial tube (x20) and plastic container (x18) made in...

thingiverse

free

Flashforge Finder Spool Holder (Piggyback style) by BulldogLowell

...attachment which will allow me four rotations as the mandrel starts to wear. you can easily adjust the mandrel...

thingiverse

free

Geoffs Solder Holder/Pen by geoff_cohen

...falling back inside - also includes a coil winder mandrel to wind the coil :- 1 - put in...

thingiverse

free

CLP: Spider Extrusion Die

...to the item the model is based off) 1x mandrel section 1x spider designed to be printed with a...

thingiverse

free

Rotary Tool Support for 3D printer 3Drag/K8200 by BorisLandoni

...hole, allows you to attach to the structure any electric-mandrel with cylindrical collar having the same diameter . more...

thingiverse

free

Zahlenstrahl - Number line / number bar by JomMa

...glue to attach top onto the bottom piece the mandrel ('dorn') glued into the bottom piece...

thingiverse

free

Flex Shaft Sanding Table by Steamboat_Ed

...in. sanding disk with some rubber cement. the disk mandrel then goes into the chuck and a peel-and-stick 3...

thingiverse

free

CETME and HK flat bending jig by Tankoj

...wrong. it was a copy of one of the mandrel pieces by mistake and it is now the correct...

thingiverse

free

Boy Scout Woggle Knot - 3 Part x 5 Bight Turk's Head Knot by allwinedesigns

...are tied by hand. you can 3d print this mandrel to use as a tool to help you learn...

thingiverse

free

drill bit sharpener silverline

...true relief angle but didn't seem to fit the diameter/mandrel length of the silverline rotary tool so made one...

thingiverse

free

Dremel Sand Paper Template by TheKre8Group

...felt polishing wheel 1". simply fold and screw on mandrel if done right the holes on the paper should...

thingiverse

free

Filament Spool Holder with 2 Bearings by Paddy_91088

...the moving part does not get stuck on the mandrel ...

thingiverse

free

5.8 GHz Helical Antenna by FrankenberryPi

...for 5.8 ghz, designed in catia. print out the mandrel and antenna support, then wrap a solid copper wire...

thingiverse

free

Paper Rocket Fin Guide by AirRocketWorks

...building the rocket body tube, then load the pvc mandrel into the center of the guide. slide the body...

thingiverse

free

POCKET TOOL GRINDER by timbologist

...back and forth, so this fixes that problem. the mandrel for the grinding wheel is a standard dremel mandrel...

thingiverse

free

Blind Rivet Axles Spool Holder by benSTMax

...rivet itself is used as a bushing and the mandrelstem) is used as the axle. 1.75mm pla or abs...

thingiverse

free

wristband clip evolution 1 & 2 by mgc_foto

...the original ring. the ring was always moving, this mandrel works better than the original ring. print it with...

thingiverse

free

1S Lipo battery case by oldhui

...printing. for the hinges, i use some leftover rivet pins/mandrel which are about 2mm in diameter. i pressed the...

thingiverse

free

Neje Master Pen Jig by Tipastar

...a skateboard). it was made to insert a pen mandrel rod (7mm) and held in place using ca bushings...

thingiverse

free

Rocket Nose Cone by PRINTSTEMPROJECT_KSGS

...piece of a4 paper can be wrapped around a mandrel of just under 30mm. this can then be attatched...

thingiverse

free

Yet Another Dremel Bit Tray by SanDiegoMark

...wrench, cutoff wheels in the plastic tube, dressing stone, mandrel and collets. printed with no bottom layers so the...

thingiverse

free

Ceriani Lathe Bellows MOD by tittopower

...with 2 holes 3ma on the head of the mandrel maintaining the bellows in line with carriage. note: my...

thingiverse

free

Dremel Drill Bit Sharpener with Finger Guard by Gwindalmir

...5° relief angle. i kept it tall to accomodate mandrel attachments. i use the keyless chuck myself and it...

thingiverse

free

TUEC Central Vacuum Plug and Key

...it assembled using the test plug's stem as a mandrel with some dish soap for lubrication. tuec test plug...

thingiverse

free

Exhaust Header Pie Cut 1.5" dia 3" CLR 9 degree cuts by hackdat

...sections from 1.5" straight metal tube, rather than using mandrel bends. i'll add some straight sections...

thingiverse

free

Geoffs Solder Holder/Pen Mk3 by geoff_cohen

...falling back inside - also includes a coil winder mandrel ...

thingiverse

free

Beefier TIG Tungsten Electrode Grinder by entityunknown

...a pita to attach since you must lock the mandrel for you grinding disc down in the collect, then...

thingiverse

free

1/2-13x1-1/4" 3DP Bolt and Nut set by Qube3Bot

...since it makes for a good 1/4 bit driver mandrel as well. the core hex helps strengthen this design....

thingiverse

free

Simple Rotary Tool Lathe by GMAY3 Design by Gmay3

...this is the exact one i used below:gyros 80-18105 mandrel 1/8" shank - stainless steel, fits 1/4" arbor holes....

thingiverse

free

Flexible Watch Band Straps with Tang Buckle for Casio or Similar

...durability. you will need to reuse the original pins (mandrel) to attach the straps to the watch. to assemble...

thingiverse

free

Fully printable Dremel table saw by nikolai2111

...depth of 2mm. i have buy these for prototying (http://www.banggood.com/10pcs-40mm-diamond-grinding-wheel-cutting-disc-with-2-mandrel-for-dremel-rotary-tool-p-987968.html). it is not perfect, but with cost of 10...

thingiverse

free

3D conversion printing objects for Scott Vision3D full-length mask to 3M p3R filters (2135) for inhalation and cotton or P1R material for exhalation by Karel48

...nail file to sharpen the sit-in surface of the mandrel mask. ! to be completed with rubber seals...

thingiverse

free

2.5" Exhaust bend snap fabrication kit by XeonDesigns

...of ebay or many other performance exhaust supply shops http://www.ebay.ca/itm/mandrelbend-donut-2-5-2-50-2-5in-2-50-2-50in-exhaust-intake-stainless-steel-/270970340096?hash=item3f17174300 these have a 7.5" outside diameter, 2.5" inside diameter,...

thingiverse

free

Expandable Dremel Bit Storage System by Fly-Boy-Rez

...l2.stl - holes for dremel tools, drills, cutting wheel mandrel -bit holder l7.stl - collets, spanner, more tools bits...

thingiverse

free

Hobby Drop Saw by jacquesl70

...degrees stl file. the electronics was sourced at banggood: https://www.banggood.com/5mm-shank-m10-arbor-mandreladaptor-cutting-tool-accessories-for-angle-grinder-p-1148363.html?rmmds=detail-top-buytogether-auto__1&cur_warehouse=cn https://www.banggood.com/775-motor-dc-12v-10000rpm-motor-double-ball-bearings-150w-large-torque-high-power-motor-p-1233434.html?rmmds=search&cur_warehouse=cn https://www.banggood.com/89mm-80-teeth-hss-circular-saw-blade-10mm-hole-cutting-discs-wheel-tool-p-1077399.html?rmmds=category&cur_warehouse=cn the power connector is a xt60. hardware...

thingiverse

free

Drill bit sharpener by mgx

...be 19mm thread size). it's also designed to accommodate mandrel upgrades. addressing some comments:doesn't fit - check your printer...

thingiverse

free

O'Cello for 1/2" rod, folding chest rest, telescoping knee rest by kelsier

...one in this build. i used these items: tube (https://www.amazon.com/rolled-steel-drawn-mandreltubing/dp/b000h9p4h8?th=1) rod (https://www.homedepot.com/p/1-4-in-x-36-in-zinc-plated-round-rod-802297/204273961) to make the telescoping end pin. rubber...