OAM BOM v1.4

	A	B	D	F	H	J
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7		Red marked parts are new parts				Disclaimer: Some links in this list are affiliate links
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9		Type	Size	Qty	Link	comment
10					Aliexpress
11	Hardware	Hex screws DIN912 / ISO 4762	M3x10	20
12			M3x12mm	91		get some more for addons
13			M4x12mm	185		get some more for addons
14			M5x12mm	10
15			M5x20mm	8
16			M5x30	6		If possible, get ones that dont have the thread until the head, but its not super important. Example
17			M5x20 buttonhead ISO7380-2	2		ISO7380-2 are buttonhead screws with a flange. If you can't get these, use 6x12x1.0 washers with normal M5 buttonhead
18			M6x20 buttonhead DIN 7380	32		You'll have to replace these with M5 depending on your extrusions (explained below)
19			M6x40 Starhandle screw	2		something like this. You might have to get a M5 size, depends on the 2020 Profiles you get
20			M3x12mm thumbscrew with base	4	Aliexpress	Example
21			M4x12mm thumbscrew with base	6	Aliexpress
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23		Nuts	M5	6
24			M10	1
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26		Washers	M3	50
27		DIN 125 A / ISO 7089	M6	16
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29		DIN 988 washer	6x12x1.0	32	Aliexpress	Only needed for M6x20 FH or M5x20 FH without flange
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32		T Nuts	M4 6mm slot	180
33			M5 6mm slot	16
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35		Threaded inserts	M3x4.6x6	100	aliexpress	You'll need a soldering iron for these. Get more for addons
36			M4x6x5	10	aliexpress
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38		Metal bars	D=30mm L=300mm	1		get a aluminum SHAFT with proper tolerances (i.e. h6). Steel will be way too heavy
39			D=12mm L=150mm	1
40			D=5mm L=50mm	4	Aliexpress	get a few more if you want to achieve high accuracy. You'll have to sort through a few to find best tolerances
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42		Aluminum Profiles
43		There are different Extrusion types. You must get 6mm slot extrusions. (V-slot are usually 6mm)
44		If possible, get B-type extrusions (left). These have a special 6mm center hole that allows you to screw a M6 screw in without tapping it first.
45		If you can't get B-Type, you will have to tap every extrusion with a M5 tap and replace the 30 M6x20 above with 30 M5x20 screws and the two M6x40 thumbscrews with M5x40
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60		B-Type	Normal extrusion 5mm center hole
61
62		Extrusions	2020 L=100	10
63			2020 L=200	5	You need to get 2 extra if youre below 45° Latitude
64			2020 L=300	5	* one of these is used for the Counterweights. You can also use a 400mm instead.
65			2020 L=400	2
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67			2040 L=300	4
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69			4040 L=100	1	Needs to be a dual slot extrusion like this
70					These usually have 5mm center holes, so you need a M5 tap for this.
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72			2060 L=100	1	Aliexpress	Can be substituted with 3 2020x100
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74		Bearings	UCF206	2	Example
75			6012	2	doesnt matter if its 2RS or ZZ
76			51115	1	Example
77			6001	2	These are the same as OAT uses
78			625	8	If possible ZZ, they run smoother. Get a few more if you want to achieve high accuracy. You'll have to sort through a few to find best tolerances
79			KP001 12mm	2	Aliexpress
80			SK12	2	Aliexpress
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82		Pulleys	GT2 16T 6mm width	4	Aliexpress
83		all with 5mm bore	GT2 48T 6mm width	4	Aliexpress
84			GT2 16T 10mm width	3	Aliexpress
85			GT2 20T Idler 10mm W toothless	6	Aliexpress
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87		Belts	GT2 2mm pitch 9mm width	about 3 meters	Aliexpress
88			GT2 closed belt 130mm/65T 6mm	4	Aliexpress	German Ebay
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90		Linear motion for ALT	1mm pitch T8 leadscrew L=150	1	Aliexpress
91			Shaft coupler 5x8mm	1	Aliexpress
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93		Electronics	Same as on OAT really, MKS, 2 TMC2209, 2 NEMA17 0.9° (large preferably)
94			MKS Gen L 2.1	1
95			TMC2209 Bigtreetech	4	Aliexpress	You can replace two of them with cheaper drivers for ALT/AZ
96			NEMA17 0.9° 2A	2		Get the biggest and strongest ones you can find. The 2A model from Stepperonline is very good
97			NEMA17 1.8°	2		Don't get the smallest ones, they have to have some torque
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99		Other	Camera Clamp	1		Depends on your scope/lens/camera. You can use this clamp/plate combo if you can attach your gear with a 1/4" screw
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