Hi,
I know that this topic has been started numerous times. I've read plenty of them till now, but still doesn't have definitive answer.
I've malt mill (2 rollers) which I want to motorize and I'm searching for the right motor + gears. From this post [1] it looks like the computed minimum torque using this site [2] is 6.7 Nm (60 in-lb). This is "in match" with [3], where minimum is defined as 7.5 NM (66 in-lb).
But I was trying with my corded drill, which has torque of 7 Nm (62 in-lb), with Special B malt and with mill full before starting, it didn't even start the mill. With the empty mill, it has stuck.
Then I tried the cordless drill with the soft torque (definition at [4]) 11 Nm (97 in-lb) and it has behaved the same as corded drill.
With pale ale malt the corded drill wouldn't start with the full mill. The cordless would start even with the mill full, but it was so-so.
From this it looks like the minimum torque is a lot bigger than shown in the links I posted.
I'm thinking of buying the 0.55 kW, 1380 rpm AC motor with gear box/transmission (don't know the right word) with ratio 10:1, so the resulting RPM would be 138 with torque of 38 Nm (336 in-lb). But I want to be sure it is sufficient to even mill a harder malt and not to stuck.
Does anyone have a reliable source where the minimum torque is defined for the malt mill? Or is there a method to measuring the torque needed for my mill without using expensive tools?
Thank You very much
[1] - https://www.homebrewtalk.com/showpost.php?p=1339882&postcount=2
[2] - https://planetcalc.com/1908/
[3] - https://homebrew.stackexchange.com/...orque-is-required-to-operate-a-barley-crusher
[4] - https://www.bosch-professional.com/gb/en/community/category/soft-hard-torque/3977186-t
I know that this topic has been started numerous times. I've read plenty of them till now, but still doesn't have definitive answer.
I've malt mill (2 rollers) which I want to motorize and I'm searching for the right motor + gears. From this post [1] it looks like the computed minimum torque using this site [2] is 6.7 Nm (60 in-lb). This is "in match" with [3], where minimum is defined as 7.5 NM (66 in-lb).
But I was trying with my corded drill, which has torque of 7 Nm (62 in-lb), with Special B malt and with mill full before starting, it didn't even start the mill. With the empty mill, it has stuck.
Then I tried the cordless drill with the soft torque (definition at [4]) 11 Nm (97 in-lb) and it has behaved the same as corded drill.
With pale ale malt the corded drill wouldn't start with the full mill. The cordless would start even with the mill full, but it was so-so.
From this it looks like the minimum torque is a lot bigger than shown in the links I posted.
I'm thinking of buying the 0.55 kW, 1380 rpm AC motor with gear box/transmission (don't know the right word) with ratio 10:1, so the resulting RPM would be 138 with torque of 38 Nm (336 in-lb). But I want to be sure it is sufficient to even mill a harder malt and not to stuck.
Does anyone have a reliable source where the minimum torque is defined for the malt mill? Or is there a method to measuring the torque needed for my mill without using expensive tools?
Thank You very much
[1] - https://www.homebrewtalk.com/showpost.php?p=1339882&postcount=2
[2] - https://planetcalc.com/1908/
[3] - https://homebrew.stackexchange.com/...orque-is-required-to-operate-a-barley-crusher
[4] - https://www.bosch-professional.com/gb/en/community/category/soft-hard-torque/3977186-t