View Full Version : Help How do you change mower blades

09-26-2001, 10:08 PM
OUCH I was changing my Scag Super Z 52 In. blades to really sharp ones. my last blade on the drivers right when I slipped holding the ratchedt on the bottom part of the nut when I slipped and cut my right palm well to make a short story short.I went to the emergency room where they hand to call in a hand specialist Dr. who had to put my palm back onto my hand OUCH ....
There has to be a better and easier way to remove these blades without loosing flesh....any good ideas would be a life saver to me...WOW a really good year for me first my broken back now my righ palm What's Next.................Signed Lefty in Port Orange Florida:cry: :cry: :cry:

edward hedrick
09-26-2001, 10:17 PM
I have a Scag STHM I use a 1/2" ratchet with a piece of EMT on the handle about 12" long for the other side I have a 1"x15/16
box end wrench. try holding the bottom stationary, use the top
nut to tighten

09-26-2001, 10:22 PM
Hey Edward thanks for the tip,tryied it OUCH my hand sorry....
I was thinking about maybe a power wrench with 1 in 15/16 socket and a 2x4 holding the blade in place........:alien:

John DiMartino
09-26-2001, 10:24 PM
I use a 1/2" impact gun,its easy,and you never get scraped.The electric ones will work too,if you change blades daily,it will quickly pay for itself.

09-26-2001, 10:42 PM
I too use an impact gun. I used to use wrenches, but if you have hit anything while mowing, it tends to tighten the blade bolt, and then those wrenches can be dangerous. I try not to over tighten the blade bolt when reinstalling, as the blades tend to tighten themselves as you mow.

09-26-2001, 10:42 PM
Walden NY humm how far are you from Pine Bush NY

09-26-2001, 10:45 PM
Spend the money and get an impact wrench, electric or air if you have a compressor.

A while back someone mentioned a rechargable electric model in a post. You might want to do a search.

Good luck lefty:eek:

09-26-2001, 10:48 PM
IMPACT WRENCH ?????????????????? this would have saved my right palm.......................OK what type of imapct wrench should I get... I already hav the compresser.....

09-26-2001, 10:56 PM
I don't know who it was but earlier this year I saw a device that holds the blade still while you tighten it. Just a thing that clamps to the deck and dosent let the blade turn.
I thought it was in Gimplers.


09-26-2001, 10:58 PM
don't hold a blade with your hand...ever! there is no need.

with lock washers in the right place, chock the blade with a piece of wood against the underside of the deck. tighten (or loosen) with a socket or impact wrench.

at worst you may need to hold one end of the bolt with a wrench while you tighten the other.

good luck.


09-26-2001, 11:05 PM
Originally posted by naturalawn
I don't know who it was but earlier this year I saw a device that holds the blade still while you tighten it. Just a thing that clamps to the deck and dosent let the blade turn.
I thought it was in Gimplers. Jim

Sears carries a simlar device.


Superior LC Inc
09-26-2001, 11:12 PM
We have 3 TURF tigers as well as 1 SCAG WB. Those all take 15/16 socket. On SCAGs the bolt goes in from the bottom with the nut on top. We change about 30 blades a week. Just hit them with the air impact wrench from the bottom while reaching around to the top to hold the nut by hand. Not too tight. Rarely have one that a fairly good impact won't loosen. We use a $100 Craftsman. Works similar on our other equipment.

John DiMartino
09-26-2001, 11:39 PM
Ron,about 10-15 minutes,do you have any permanent back damage from the fall?

Shady Brook
09-27-2001, 12:10 AM
Ingersol Rand makes great impact wrenches, also Chicago Pnematic. If you have a quality impact, like an IR231 you just torque it off. No need to put another wretch on the other side, the impact will brake the bolt loose, and or tighten it without any further assistance. An impact wrench is an awsome tool. One other possibility, though not as good is a blade buddy. It is a tool sold by scag that will hold the blade in place while you turn the wrenches. Sometimes this method does not work, while the impact always works.:p


I need more power Mr. Scott! :D

09-27-2001, 12:12 AM
I just brace my 15/16 wrench against the deck, attach the socket to the top nut and turn. Since the bottom wrench is braced against the deck I have no reason to place my hand under there, remove the blade and reverse the procedure. Very easy and safe that way.

plow kid
09-27-2001, 12:30 AM
I use a vise-grip welding c-clamp to hold the blade still, just clamp it on the deck skirt & wrench away

09-27-2001, 02:27 AM
I used the wrench on the bottom and a 1/2 in drive impact gun. Can't baet it.

Did them a few times by hand for whatever reason, and yes I did slip once. 3 stitches were needed (was told by a doctor later that year) Nice scar on my palm. :)

09-27-2001, 03:15 AM
get a 3inch diameter pvc pipe, 6in long, one end on the blade, the other out the discharge chute or another blade, it saves my hands every week!!

09-27-2001, 03:41 AM
Air impact wrench

When that wont do. Breaker bar and 15/16th socket and a block of wood.


09-27-2001, 04:03 AM
WHOA! Too many of you guys are geting hurt by sharpened blades! Whenever I tightened them , without assistance, I always used my foot as an anchor ( not the best practice) But even when using an impact now, (rechargable) I still prefer to use gloves. I can't help but feel that this pays off.

09-27-2001, 06:43 AM
I also cut my hand once, before I bought a compressor and an impact wrench. This ranks right up there as one of my best investments.

09-27-2001, 07:18 AM
okay yaw knew i would have to post.the 12volt impact
that plugs to a cigerette lighter,will eliminate anything hard about this job.one hit and its off ,another and its on. w doubles
torque it or just hit 3 quick licks w impact. im in the process of getting these for my daughters to have in their cars.
gettum on ebay

09-27-2001, 07:51 AM
Maybe I'm not getting something here. Why does everyone have to hold the blade to change it? I use two wrenches. One on the bottom and one on the top. Turn them to take the nut off. When I get it loose enough to loosen by hand, I spin it off until the bolt falls thru and the blade is off. The only time I touch the blade is when I put the blade back on the bolt and push it back thru the deck. I can change three blades in less than five minutes. I do wear gloves because sharp blades can cut you just by handling them.

plow kid
09-27-2001, 03:17 PM
on my deere floating deck the blade is held on by a 12mm bolt that is 50 mm long that goes strait into the spindle, no other way to keep the blades from turning

09-27-2001, 04:58 PM
Impact wrench is definately the way to go. I have a craftsman (made by IR) around $200.00.

I always wear gloves, you'll find that you don't have to hold against the blade with an impact.

Remember, don't use the impact to put it back on with, get a 1/2 drive torque wrench, I use a Snap-On; expensive, but nice.;)

09-27-2001, 07:24 PM
I use the impact wrench, always. Block the blade with a short 2x.
Northern Tool I think has one of the blade holder clamps.

Wrenches and sharp edges are dangerous to your livelyhood. Be CareFul!

09-27-2001, 08:33 PM
i hung me a chain hoist in my garage and bought an air compressor and impact.i can have them off ,sharpened and back on in 5 min.

Albemarle Lawn
09-27-2001, 11:20 PM
A blade will stay "sharp" longer if it is not razor sharp.

That super sharp edge represents THIN metal which is deformed more quickly.

A weedeater cuts grass, how sharp is .080 Monofilament? And a weedeater is usually turning slower than a mower blade.


09-27-2001, 11:45 PM
Hey all thanks for the blade tips.....
For my back yes I have pain all the time,especially when I had a MVA and rebroke my t-12 vert.... but I am not gona let this get to me....NO SIR .........lI have been working doing my 25 lawns a week and loving it.. Man I sure love these American Flags You all have on your signatures Man I gota Have One.... PLEASE.......