Cabinetmaking Forum

You are not logged in. [ Login ] Why log in
(NOTE: Login is not required to post)

Freeborn Lock Miter in MDF

7/10/21       
Mark V.

I have a big job coming up where I need to make quite a few thick shelves and other components. I would like to know if the Freeborn lock miter set (PC-28-020) will work when joining veneered MDF to a solid wood edge. I can’t miter fold as I want to create an offset joint to allow 1/16” of solid wood to be in front of the veneer, after assembly, to help protect it from damage. The MDF will have the tongue and the solid will have the groove. I have the shaper and groover set-up down, but I am wondering if I am going to run into problems machining and assembling with the MDF.

Thank you for any advice or suggestions you can offer.

Mark


View higher quality, full size image (3264 X 2448)

7/10/21       #2: Freeborn Lock Miter in MDF ...
Mark B

You can setup any lock miter for the projection your looking for. Its not a function of the tool but rather your fence setup. We run lock miters quite a bit. Once you get your head around the setup they are no big deal. There is a good setting jig out there though Im not sure if it will run on the freeborn set you state but some quick googling will likely land you on the jig. I just set them up flat on the shaper as we dont have the jig.

7/10/21       #3: Freeborn Lock Miter in MDF ...
Mark V.

Thank you Mark!

I have my head wrapped around the set-up and the machining of the joint, but I’m concerned about the material… namely the MDF.

I have heard that the lock miter setup does not work well with MDF. I’m wondering if most people are referring to the “double tongue” variety of the lock miter joint (which I guess is more common) versus the Freeborn tongue and groove version (shown above). Do you think that I will run into any problems with the MDF itself or the tongue in the MDF sliding into the groove in the hardwood? Several panels will be 96” long.

Mark

7/10/21       #4: Freeborn Lock Miter in MDF ...
Mark B

I honestly dont see any issue with the cutter your using. We lock mitered 16' faux poplar beam wraps (3 sides with a cap on top) and I have lock mitered endless jobs on mantles, timber wraps, commercial components, that required the same reveal your drawing shows (solid wood face or even a slight projection for laminate on one face) without an issue and honestly we just have a dog sh8t Freud brazed lock miter for the shaper.

I understand your concern (I overthink everything) but there's not much to it. The setup can be frustrating but once you get your head around the geometry its zip. Whoever is telling you MDF is an issue I have no idea. Dealing with the issues of MDF just are what they are. Its a material spawned buy lucifer himself. Is what it is.


View higher quality, full size image (1600 X 1200)


View higher quality, full size image (1600 X 1200)

7/10/21       #5: Freeborn Lock Miter in MDF ...
Mark B

Im sure your clear that your solid wood member is going to have to be thicker than your MDF member if you want a clean meet on the short point of the miter but again, the tooling and material (in my opinion) are of zero concern. We've not lock mitered a lot of MDF simply because the jobs that typically pay for that level of setup dont run MDF but I would have zero issue if thats what the customer is spec'ing

7/13/21       #6: Freeborn Lock Miter in MDF ...
Kevin Jenness Member

It will work fine. The only issue will be faster dulling of the cutters. The Freeborn set's fit can be adjusted with the dado width by shimming, and it is much easier to run everything flat.

7/18/21       #7: Freeborn Lock Miter in MDF ...
Dan drb woodworks

We’ve been using this for years, with a dedicated shaper and tablesaw it’s always ready since we use it almost everyday. On every 90 degree corner. All outside corner of face frame and end panel. We do ton of faux beams .You will find tons of uses when you have it always setup .

7/21/21       #8: Freeborn Lock Miter in MDF ...
Mark V.

Thanks for all the help.

If I groove the solid front edge as shown above, which finishes out at 2-1/4", I would have to clamp across the long dimension which is about 16" and would require lots of big clamps.

If I groove the MDF sides, I would have to clamp across the short dimension which could be easily handled with 3" spring clamps.

Does anyone see a problem grooving the MDF? I know that I wont be able to get a sharp point where the groove meets the 45° edge of the angle, because the MDF will "tear out", but I don't think this will matter.

Your thoughts?

Mark

  • Post a Response to this thread
  • notify me of responses to this topic
  • To receive email notification of additions to this forum thread,
    enter your name and email address, and then click the
    "Keep Me Posted" button below.

    Please Note: If you have posted a message or response,
    do not submit this request ... you are already signed up
    to receive notification!

    Your Name:
    E-Mail Address:
    Enter the correct numbers into the field below:
     

    Date of your Birth:



    Return to top of page

    Buy & Sell Exchanges | Forums | Galleries | Site Map

    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.
  • Comments, questions, or criticisms regarding Forum policies should be directed to WOODWEB's Systems Administrator
    (return to top).

    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 Help
    Your Name The name you enter in this field will be the name that appears with your post or response (return to form).
    Your Website 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)
    E-Mail Address 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 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 .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)