Conditioning finer grit metallic bonded stones with loose grit rather than acid etching?

[ChasingSharpness]

Hi everyone,

I have been looking at these Poltava premium bronze CBN metallic bonded stones. I have read that it is possible to condition the coarser stones with SiC grit rather than acid. But I was wondering if anyone had any expirence conditioning the 1100-1700 grit (14/10/7ish) medium metallic bonded stones with SiC only rather than etching with acids?

On a seperate note, are these metallic stones any good for deburring? I've never used this type of bond before so I have no expirence in this regard.

Thank you for your time,

 

[UncleBoots]

I have Poltava metallic bonded stones in various grits.

I tried using SiC powder, but I didn't think it did a very good job of exposing new grit, compared to ferric chloride, even at low grits like 400.

However, ferric chloride is nasty, messy stuff, and hard to keep off of the metal base, so I've switched over to electrolysis. I'm pretty happy with that.

 

[ChasingSharpness]

Many thanks, I appreciate the insight from that real world testing. I was also wondering if anyone has tried conditioning the Venev MS-1 stones? As far as I understand they have some SiC in the binder. J was wondering if this makes them easier to condition with SiC rather than etching?

 

[abrasivetools]

For metal bond:
- FeCl softens the bronze to flatten it on glass plate
- SiC powders on glass plate, grain size selection below
- CBN pastes on 3 iron plates. One iron plate for each grit size set (60/40 and 28/20, 14/10 and 7/5, 3/2 and 1/0), total working time 1 hour. This method is more expensive, but more effective.

Selection of SiC powders for dressing of sharpening stones

Stone	Starting grit	Finishing grit
500/400 μ = 35/40= D501	F16 (1230 μ)	F24 (745 μ)
400/315 μ = 40/45= D426	F16 (1230 μ)	F46 (370 μ)
315/250 μ = 50/60= D301	F24 (745 μ)	F46 (370 μ)
250/200 μ = 60/70= D251	F24 (745 μ)	F60 (260 μ)
200/160 μ = 70/80= D213	F36 (525 μ)	F60 (260 μ)
160/125 μ = 100/120= D151	F46 (370 μ)	F80 (180 μ)
125/100 μ = 120/140= D126	F60 (260 μ)	F100 (129 μ)
100/80 μ = 140/170= D107	F60 (260 μ)	F120 (109 μ)
80/63 μ = 170/200= D91	F80 (180 μ)	F150 (82 μ)
63/50 μ = 230/270= D64	F100 (129 μ)	F180 (69 μ)
50/40 μ = 270/325= D54	F120 (109 μ)	F220 (58 μ)
40/28 μ = 550= M40	F150 (82 μ)	F240 (46 μ)
28/20 μ = 650= M25	F180 (69 μ)	F320 (30 μ)
20/14 μ = 1100= M20	F240 (46 μ)	F400 (18 μ)
14/10 μ = 1500= M16	F320 (30 μ)	F400 (18 μ)
10/7 μ = 1700= M10	F400 (18 μ)	F600 (10 μ)
7/5 μ = 3000= M6.3	F600 (10 μ)	F800 (6,7 μ)
5/3 μ = 4000= M4	F600 (10 μ)	F800 (6,7 μ)
3/2 μ = 6000= M1.5	F800 (6,7 μ)	F1200 (3 μ)
2/1 μ = 10000	F800 (6,7 μ)	F1200 (3 μ)
1/0 μ	F800 (6,7 μ)	F1200 (3 μ)
0.5/0 μ	F800 (6,7 μ)	F1200 (3 μ)