dwain
-
Posts
1,476 -
Joined
-
Last visited
-
Days Won
17
Content Type
Profiles
Forums
Events
Posts posted by dwain
-
-
Hey guys! I haven't posted here for ages! It's rather quiet ...
But thought some of you might like a look at this CRACKING saw.
-
2
-
-
I'll let you guys handle those minor extras
-
1
-
-
1 hour ago, kornomaniac said:
Aha!
That alot of power difference.
Unless their was a thermal shutdown on a battery do we think that a hotter running battery looses runtime ?
Yep. As I understand it, heat causes cells to lose efficiency quite markedly. Seems that cold also affects performance - https://batteryuniversity.com/learn/article/discharging_at_high_and_low_temperatures
This is why you will never get half the runtime of a 4ah battery on a grinder using a 2Ah battery.
EDIT: hmm perhaps I'm wrong and increased temp only hurts the lifecycle of the cell, not it's immediate performance ...
EDIT 2: It seems that batteries can have increase 'performance' (meaning amperes out) in high temp, but it also significantly increases the self-discharge rate.
-
On 9/10/2018 at 8:50 PM, kornomaniac said:
@dwain Dwain if you'd had to take a guess and you would do these tests on the flexvolt grinder. What You'd think the results would be ? ( Like guessing hypothetically 😛 )
id assume you'd score the power more like 25 ? ( Compared to 20 for the 18v deWalt grinder for example ).
how would the runtime go ? Logically I'd think the flexvolt grinder would have less runtime then their 18v grinder you tested right ?
Hi korno.
If it's pure guesswork, I reckon the flexvolt would probably be around 27-30 for power by comparison.
No idea on runtime. It may win because the test would be far easier for it and hence not heat up the cells too much....
-
Thanks friends!
-
Hey folks! Long time no chat, sorry I've been away a lot.
Hope you like it!
-
5
-
-
Hey tool lovers, do you have this in the US yet?
It's a beeeeeast.
-
1
-
-
10 hours ago, kat said:
so basically 'brushless' is just a fad, and soon it will be abandoned
I used to think the same about LCD TV's. They did not have as good a picture as plasmas, had poor blacks etc etc.
Somehow the manufacturers convinced the masses they were better and they started outselling plasmas. Eventually plasmas stopped being made because there wasn't enough of a market to make them economically. But if my kid hadn't turned it into a paper weight, I'd still be running my late model 64" plasma.
-
3
-
-
yeah it used to be that brushless tools were often less powerful than their competitors. that is rarely the case anymore, but i suspect that's less to do with the BL motor, and more to do with battery tech. Not sure.
No never used the Metabo OMT sorry. We like Metabo gear too. The BL grinder is in our upcoming comparison and seems to be a great unit.
Yeah the Makita planer is a great unit. Only the BL Dewalt rivals it. All the other brands were brushed too.
-
1
-
-
Makita still have the best performing cordless OMT of the big brands as far as I know (though I'm partial to the Bosch starlock).
-
Yeah the IP56 tools were pricey on release.
-
1
-
-
ah tricked by ebay. yeah places like Sydney / Total Tools are good ways of checking.
-
1
-
-
oooohhh, shiny!
-
2
-
-
The 'new' 7-1/4" M18 unit is just the same 7-1/4" saw with a 12Ah battery yes?
-
I wouldn't make a general statement about the brands, but those two kits specially, yep go the Rigid. The brushed battery grinders aren't very good anyway (with the exception of Metabo).
When you get a chance to pick up the BL Rigid grinder, you won't regret it, it's a nice tool.
-
I'd have to disagree with you there D W.
Hitachi 6Ah batteries have consistently been priced in the AU$130-145 region, whereas the standard across other professional brands is $170.
Their super fast charger is expensive, but you'll get it in a kit anyway. In terms of kits, I'd sat their prices are about average ....
-
1
-
-
sick
-
1
-
-
I think that's exxageration.
It's probably beaten by the lastest Makita recip saws, but is there amongst the top with the new Bosch & Flexvolt. Comparisons by reviewers have said as much.
Given their age, I think the FUEL recip saw and circular saw have proven to be incredible tools, way ahead of their time. Obviously if they want to be back on top, they'll need to improve them again.
-
we'll definitely be testing and informing people of the power drop associated with the more 'normal' batteries.
-
1
-
-
On 4/26/2018 at 5:44 AM, ToolBane said:
I guess that’s a reasonable consideration, but is the Bosch not sold as a bare-tool?
Of course you’ll have to pick a winner for “best right-now” performance, so if for example the Bosch with it’s 7Ah capacity battery takes the cake then great. Then discuss by what degree the larger battery may have played a role by comparing the “normalized” results of all tools using 5Ah batteries across the board. My priorities won’t be the same as everyone else’s, in fact I might be a small minority so I don’t want to overstate or anything, but to me the normalized results are what I would want to see first. After that how significant a performance gain do larger batteries yield in general. All these manufacturers are going to be having 3-bank, 10Ah+ batteries coming before too long, and I don’t think it a radical assumption that all the tools you’ll be testing will yield better results when it happens, the same way impact drivers benefit every time you use a dual-bank battery in place of a compact single-bank.
Hey Toolbane. Yeah I agree mostly.
However some of these tools have been designed with a motor designed to take advantage of a higher-draw battery, while some have not. In this case, I think it important to show what the grinder is capable of.
-
A Hilti rep would agree I'm sure. I daresay that Bosch and Metabo would feel very hard done by.
-
Essentially the test will show the best power/run time you can get out of each of the grinders with the current battery options, but also if theres a power drop running regular (18650) batts (e.g. 5/6Ah)
-
2
-
-
6 hours ago, ToolBane said:
Battery capacities are a moving target. Any company running “only” 6Ah batteries today could be running 12Ah tomorrow. Dewalt is planning on releasing such a beast soon, and there are no magical forces to suggest we won’t see the same from every other company before long. Everyone knows they all source their cells from the same manufacturers anyway.
My opinion the most objective testing should be done matching battery capacities as closely as possible. You can always do a comparative analysis after the fact, showing the degree brands currently having larger Ah batteries will perform even better than the “standard baseline” of 5-6Ah.
I hear ya ToolBane. How would you respond to one of the manufacturers though, if they say that the grinder comes with a premium battery in kits, and was designed for it (ala Bosch).
-
1
-
-
12 hours ago, D W said:
@dwain would it be worthwhile to throw in a corded grinder as well? To reduce the amount of work you have to do it could be a single performance comparison test between the best performing cordless and a corded.
In advance i'll say thanks for the video, they must be a ton of work to make.
Cheers mate, we are planning to do exactly that actually. Not to include it in the comparison of course, but a reference for power. I've go a 900W Dewalt for the job.
-
2
-
That alot of power difference.
sds rotary hammer advise
in Power Tools
Posted
Sorry didn't see this thread until now.
I think you're on the money. a 3/4" inch hole will be too small to take advantage of an SDS Max. Sure it would be easy on the tool, but it would also be slower than the best SDS+ units. Having said that, I'm not sure if MAX would be slower than those two units, which are unlikely to match the 36V/54V units we tested against.
EDIT: it appears that Dewalt 20V unit has the same specs as the Flexvolt SDS+, so maybe it will!
Let us know how you get on!