Been using Makita and Festool 5" electric Sanders for a long time now. I want a sander that's more aggressive but must have self vacuum feature. I have tried 3 M's 5-inch sander with 80 grit and as soon as I apply any pressure the sander Skidders all over the place. So my question is is this the nature of all RO sanders or should I try a dynabrade or other brand.
80 grit is going to leave marks. RO sanders aren't designed to remove much stock. you are asking for something that isn't going to be possible. all of my sanders are Dynabrade, 5" gets almost no use. most used are the 6", also use 8" and 12",air powered. all require a light touch except the 8" as it is going to leave marks no matter what.
I just want the sander for roughing out then using a finer Grit afterwards. I have a cheap random orbital 5in that weighs twice as much as the 3M sander and it does not Jitter like the 3M sander only problem is it doesn't have self vac.
A lot is going to depend on your budget. You mention Festool so I would assume your willing to pay for a good sander. In that range I would suggest looking at Mirka Deros or the SurfPrep DC brushless sanders. They both have dust collection (via a vac, dont know if self dust collection means you want it with a bag on board). But both of those options are going to set you back 500 bucks a pop.
The jittering you speak of with the dynabrade and 80 grit I fear is going to be a possibility with any aggressive sander, coarse paper, and operating at less than full speed. Every sander Ive owned, if you run coarse paper and your not at the full rated speed of the sander, it will rattle you all over the place.
We find that with quality, aggressive, sanders you can generally start sanding a couple grits higher than you normally would due to their performance and you can also stop sanding a grit or two lower than you normally would and still have good finish.
Was the 3M sander you tried electric? Ive wanted to get my hands on one of the 3M electric Dynabrades but my local distributor doesnt ever deal in them so Ive never been able to try one. They look like they may be rebranded.
I have the 5" 3M ro with self generated dust collection. It does shudder with coarse grits. I have found that if I restrict the air with the valve to keep the speed down I can control the shuddering and I find that the discs last much longer. I don't think it reduces the effectiveness of the sander much if at all. I fall back on my 6" electric Rigid random orbit for larger heavier sanding though. It's awkward for vertical surfaces and smaller areas.
I use older Festool Rotex 6" sanders that hook up to a Festool vacuum- probably 20 years old. The Rotex means there is an aggressive action that really does remove wood quickly when compared to other R/O sanders. Then switch it over (mechanical rotary transmission switch)to R/O and it it is a great sander in the finer range.
I love these sanders, and hope I never have to replace them.
Thanks for the replies and tips.
The sander was a 5in 3M with a 3/16 orbit self vac.
I had a rep come out so I could test it and never thought of turning the speed down to stop the skittering nor did I use anything higher than 80 grit. I will have to do another test I guess. Heard nothing but good things about the Festool Rotex sander except for the fact that I don't want the central vac and I'd like to have one handed sander not two hands.
Really any time you "apply pressure" you can actually reduce the efficiency of the sander. They are designed to do the best work at speed and slowly moved about. If you need to remove that kind of stock, go to a hand held belt sander.
FORUM GUIDELINES: Please review the guidelines below before posting at WOODWEB's Interactive Message Boards(return to top)
WOODWEB is a professional industrial woodworking site. Hobbyist and homeowner woodworking questions are inappropriate.
Messages should be kept reasonably short and on topic, relating to the focus of the forum. Responses should relate to the original question.
A valid email return address must be included with each message.
Advertising is inappropriate. The only exceptions are the Classified Ads Exchange, Machinery Exchange, Lumber Exchange, and Job Opportunities and Services Exchange. When posting listings in these areas, review the posting instructions carefully.
Subject lines may be edited for length and clarity.
"Cross posting" is not permitted. Choose the best forum for your question, and post your question at one forum only.
Messages requesting private responses will be removed - Forums are designed to provide information and assistance for all of our visitors. Private response requests are appropriate at WOODWEB's Exchanges and Job Opportunities and Services.
Messages that accuse businesses or individuals of alleged negative actions or behavior are inappropriate since WOODWEB is unable to verify or substantiate the claims.
Posts with the intent of soliciting answers to surveys are not appropriate. Contact WOODWEB for more information on initiating a survey.
Excessive forum participation by an individual upsets the balance of a healthy forum atmosphere. Individuals who excessively post responses containing marginal content will be considered repeat forum abusers.
Responses that initiate or support inappropriate and off-topic discussion of general politics detract from the professional woodworking focus of WOODWEB, and will be removed.
Participants are encouraged to use their real name when posting. Intentionally using another persons name is prohibited, and posts of this nature will be removed at WOODWEB's discretion.
Carefully review your message before clicking on the "Send Message" button - you will not be able to revise the message once it has been sent.
You will be notified of responses to the message(s) you posted via email. Be sure to enter your email address correctly.
WOODWEB's forums are a highly regarded resource for professional woodworkers. Messages and responses that are crafted in a professional and civil manner strengthen this resource. Messages that do not reflect a professional tone reduce the value of our forums.
Messages are inappropriate when their content: is deemed libelous in nature or is based on rumor, fails to meet basic standards of decorum, contains blatant advertising or inappropriate emphasis on self promotion (return to top).
Libel: Posts which defame an individual or organization, or employ a tone which can be viewed as malicious in nature. Words, pictures, or cartoons which expose a person or organization to public hatred, shame, disgrace, or ridicule, or induce an ill opinion of a person or organization, are libelous.
Improper Decorum: Posts which are profane, inciting, disrespectful or uncivil in tone, or maliciously worded. This also includes the venting of unsubstantiated opinions. Such messages do little to illuminate a given topic, and often have the opposite effect. Constructive criticism is acceptable (return to top).
Advertising: The purpose of WOODWEB Forums is to provide answers, not an advertising venue. Companies participating in a Forum discussion should provide specific answers to posted questions. WOODWEB suggests that businesses include an appropriately crafted signature in order to identify their company. A well meaning post that seems to be on-topic but contains a product reference may do your business more harm than good in the Forum environment. Forum users may perceive your references to specific products as unsolicited advertising (spam) and consciously avoid your web site or services. A well-crafted signature is an appropriate way to advertise your services that will not offend potential customers. Signatures should be limited to 4-6 lines, and may contain information that identifies the type of business you're in, your URL and email address (return to top).
Repeated Forum Abuse:
Forum participants who repeatedly fail to follow WOODWEB's Forum Guidelines may encounter difficulty when attempting to post messages.
There are often situations when the original message asks for opinions: "What is the best widget for my type of shop?". To a certain extent, the person posting the message is responsible for including specific questions within the message. An open ended question (like the one above) invites responses that may read as sales pitches. WOODWEB suggests that companies responding to such a question provide detailed and substantive replies rather than responses that read as a one-sided product promotion. It has been WOODWEB's experience that substantive responses are held in higher regard by our readers (return to top).
The staff of WOODWEB assume no responsibility for the accuracy, content, or outcome of any posting transmitted at WOODWEB's Message Boards. Participants should undertake the use of machinery, materials and methods discussed at WOODWEB's Message Boards after considerate evaluation, and at their own risk. WOODWEB reserves the right to delete any messages it deems inappropriate. (return to top)
Forum Posting Form Guidelines
The name you enter in this field will be the name that appears with your post or response (return to form).
Personal or business website links must point to the author's website. Inappropriate links will be removed without notice, and at WOODWEB's sole discretion. WOODWEB reserves the right to delete any messages with links it deems inappropriate. (return to form)
Your e-mail address will not be publicly viewable. Forum participants will be able to contact you using a contact link (included with your post) that is substituted for your actual address. You must include a valid email address in this field. (return to form)
Subject may be edited for length and clarity. Subject lines should provide an indication of the content of your post. (return to form)
Thread Related Link and Image Guidelines
Thread Related Links posted at WOODWEB's Forums and Exchanges should point to locations that provide supporting information for the topic being discussed in the current message thread. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related Link that directs visitors to an area with inappropriate content will be removed. WOODWEB reserves the right to delete any messages with links or images it deems inappropriate. (return to form)
Thread Related File Uploads
Thread Related Files posted at WOODWEB's Forums and Exchanges should provide supporting information for the topic being discussed in the current message thread. Video Files: acceptable video formats are: .MOV .AVI .WMV .MPEG .MPG .FLV .MP4 (Image Upload Tips) If you encounter any difficulty when uploading video files, E-mail WOODWEB for assistance. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related File that contains inappropriate content will be removed, and uploaded files that are not directly related to the message thread will be removed. WOODWEB reserves the right to delete any messages with links, files, or images it deems inappropriate. (return to form)
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.