Revision as of 04:17, 18 July 2017

D3D uses 12mm x 3mm neodymium N52 magnets to hold axes to the frame.

Cost

18 cents US seller N50 - [1]
28 cents Brooklyn seller - [2]
40 cents - 1/2" - [3]
10 cents - 10x2 N50 - [4]
31c 12x3mm - [5]
40 cents 12x3 n52 - [6]
17 cents USA 12x3 n35 - [7]
17 cents 12x3 from china n52 - [8]
28 cents 12x3 @ 1000 from UK n52 - [9]. This appears to be the best option.
7 cents 10x2 HK n52 (looks like 1/16" thickness) - [10]. While this looks cheaper, this is not because of the lower strength of 10x2.
16 cents 12x3 n50 - [11]
12 cents 12x3 n50 china - [12]
14 cents 12x3 n50 china - [13]
11 cents 12x3 China - [14]

12x3mm appears to be 8 lb - [15]
10x3mm is 5.5 lb - [16]
20x10x2mm is 4.8 lb - [17]
10x2mm n52 is 2.6 lb - [18]
12x2mm n52 is 3.8 lb - [19] - note - this is probably 1/16", or 1/2 the pull force of the 1/8" version (3 mm)
6x3mm n52 is 2.9 lb - [20]
6x6mm n52 is 4.2 lb - [21]
25x2mm n42 is 6.8 lb -[22]
6x1.5mm n35 - 1 lb - [23]

2 mm compared to 3 mm appears to be 1/2 as strong. 2 mm is really 1.6 mm, of 1/16", compared to 1/8", or 3 mm. That makes sense.
Thus, it's more favorable to go with 3mm thickness.

@@ Line 2: / Line 2: @@
 =Cost=
+*'''18 cents US seller N50''' - [http://www.ebay.com/itm/LOT-N50-N35-12X3mm-Strong-Ring-Disc-Magnet-Round-Hole-4mm-Rare-Earth-Neodymium-/262950850500?var=&hash=item3d39178fc4:m:mZ_TGv3NlyiJYF-53bpHNTQ]
 *'''28 cents Brooklyn seller - [http://www.ebay.com/itm/25-50-100pc-12mm-x-3mm-1-2-x-1-8-N52-Strong-Rare-Earth-Neodymium-Magnet-Disc-/302030262749?var=&hash=item46526811dd:m:mwInpFTJNe0z38bJt7A8xag]'''
 *40 cents - 1/2" - [https://www.amazon.com/gp/aw/d/B01LZ2XRML/ref=mp_s_a_1_1?ie=UTF8&qid=1484023257&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=100+pcs+super+magnet]