The attraction of a used bridgeport is you can get a big, capable machine with a lot of weight in its castings for very little cost, at the expense of having to DIY any additional features like CNC or even just DRO scales and of course having no technical support available when something goes wrong. The centroid kit is designed for diy conversion. Broke off the Y-axis stepper and damaged the speed control. I am afraid of the unknowns that could easily cost you a ton of money and, more importantly, time. Bridgeport Machine Company popularized small to mid-size vertical mills from 1938 until 2004. They made so many mills that its common to hear of any small vertical mill machine referred to just as a Bridgeport. How to convert a Bridgeport Boss 6 to Mach 3. I used direct drive nema34s on the x and y and a large nema23 with a belt drive on the z. Crypto Included: DP500 Bridgeport DRO Kit. Trouble shooting Very little documentation for Chinese conversion kits. You can easily CNC the ones with manual movement provisions, this one would cost you more than buying 3 clapped out bridgeports and trying to get one frankenmill out of them to CNC. Repairs should be easy enough. This document outlines how to convert a Bridgeport CNC with Boss controller to Mach3. Good documentation on the mill itself. Reviews (0) SKU: ACUE82097001. 0005” resolution. Our service department prides itself with the vast knowledge and expertise to efficiently solve your problems in a cost effective manner. The servos/drives for the X and Z axis are also from DMM. used Bridgeport with a CNC conversion kit maybe. Kit includes a size NEMA 42 motor mounting plate, motor pulleys, lead screw pulley, motor cover, drive belt, and Wow! Great job. Add to cart. Messages. Centroid is a third party controller. pdf There is also an important accompanying Video. Bridgeport CNC Conversion. I rather like those controls for the most part and would be inclined in that direction myself. /ft. Apr 17, 2022 · Most dc motors are rated for either 90 volts, or 180 volts. Product. Seller's other items. Oct 5, 2016 · Sell the manual and buy a dead CNC. I'm open to buying a manual mill and converting it, but not preferred. Doing a conversion is going to cost 2-3 times the cost of a Shapeoko…will this machine be orders of magnitude better? 1. 3. Note: For most three-axis CNC applications, we highly recommend TRAK Bed Mills. It may seem nitpicky to haggle over $400, but that's also ~ the increase in street price on a KC20VS from last year to this year, so that's Nov 2, 2023 · SINGLE PHASE CONVERSION KIT FOR BRIDGEPORT STEP PULLEY MILL WITH INSTRUCTIONS. don't finance a new machine until you're committed. I eventually swapped all the cnc gear onto a similar size new square column mill. We offer Centroid CNC and other CNC controls to suit your needs for improving your mill s performance and features. (1498) 100% positive. This will be a complete conversation using hiwin ground ball screws, dc servos, Machdrives BRA dual encoder servo drive along with Sino glass scales for the second encoder with mach3 or 4. Mar 23, 2023 · CNC Masters, an American company, offers its Supra 9 x 49 vertical knee mill as a classic Bridgeport-type milling machine with CNC technology on a 9″ x 49″ table size. I've searched everywhere on this site with no luck. But. sheetmetal/enclosure. And up to 8x the accuracy of your original control. $24,752. It will easily break tooling and fuck shit up, but it's also a lot of power for that size machine. You really have to weigh if the tool changer and turnkey solution is worth triple the price compared to a HAAS TM-0P. At roughly 3500 now just to get the mill and the ballscrew kit you really don't get much. You are a little off there - the street price on mill and ballscrew conversion kit is more like $3000-$3100. 0005 in. A subreddit for enthusiasts of Hobbyist CNC machines like the Shapeoko, X-Carve… The typical thing for small, inexpensive CNC metalworking machines is to buy one of the little Asian manual machines (a Sieg or one of the various Rong Fu clones - usually imported/branded via Grizzly or Harbor Freight or whatnot) and DIY it either yourself or with one of the various conversion kits that are now widely available. Pick one. CENTROID CNC manufacture of CNC control systems for Mills,Lathes,Routers,and other Machine tools. Nov 6, 2018 · The MicroKinetics Bridgeport Knee CNC retrofit kit includes the mechanical components needed to automate the knee of a manual Bridgeport or similar type milling machine for motorized control. The kit includes (2) Size 42 motor mounting plates, (2) motor pulleys, (2) lead screw pulleys, (2) motor covers, (2) drive DIY CNC Controller kits, parts, and accessories. I simply don't have the money to contemplate a good VMC right now. A brief summary of our machine rebuild process: Over the past 37 years, Bridgeport Machine Rebuilders has rebuilt over 1,721 and repaired over 11,476 Bridgeport milling machines across the country. The Servo Variable Frequency Drive will upgrade your mill with electronic speed control! CNC, which stands for Computer Numerical Control, allows precise and automated control of the milling machine's cutting tools. Even better: the steppers and motion controller will work with bigger equipment, so if you outgrow the mini-mill and want to move up to a G0704, or even a Bridgeport, all the CNC conversion parts save the ballscrews will transfer over. So I got put in the mill room on my own because our normal guy is on vacation and the lead needed parts ran, I have basically 0 experience on this… The first step is removing the old NC control from the machine. It's not super cheap but it's not like the retrofit kits built for specific machines. I would probably go with servo motors because steppers tend to ''cog'' when operating manually. It will provide a load life expectancy of 50 million inches of travel at an operating load of 400 pounds. Tormach PCNC. If anyone's looking to convert a precision Matthews, Arizona CNC kits are the best. The other is a cnc mill, these usually have a rectangular volume that is typically close to 12” in all directions. I liked having a manual mill but I found that anything more complicated than squaring stock required a lot of skill and thought to get right. Bridgeport Boss 1-7 Knee Mill CNC Kit $7166. May 10, 2016 · Doing a conversion really well is relatively involved, and not cheap. Mar 8, 2011 · We have found a complete conversion kit from MachMotion, their X15-250-MK TECO for $5469, which seems to be exactly what we are looking for and need to do the conversion. This little machine shop 3990 mill CNC conversion kit is simple to use, making it the go-to CNC machining solution for beginners and DIY enthusiasts. 00. Bridgeport Machines Ltd made Bridgeport knee mills with Heidenhain controls that lasted quite well. NYCCNC has a bunch of older videos working with these and they're pretty capable for aluminum work (considering the price) -2. It is a lot more powerful and has a huge bed compared to the tormach. I did a conversion on an old Taiwan rf30 just like that. The screw and nut assemblies are made of hardened Then you will have to get somebody to bend/brake the parts as needed, maybe weld too. The retrofit is a good complement to the Centroid 3 axis retrofit that is on the machine. This is very similar to the cost of the Little Machine Shop Micro Mill, the Harbor Freight MiniMill, and the Grizzly Mill. Machine Model. I have had the Servo VFD+ retrofit on my Bridgeport type mill since August 2023. rigidity. Industry-leading 3 Year Warranty. $19,712. I might be able to get a J Head for a reasonable price in pretty good condition but I don't know much about this specific model and how feasible it would be to convert it to CNC. Since I have X,Y, and Z under CNC control, I am happy. On large parts and large arcs this is faster than what you can do on a CNC. H&W Machine Surplus Warehouse. This will get you a CNC mill that will do brass, aluminum, and even some steel (slowly) all day. I don't think this method of Z axis conversion would work without swapping the knee screw for a ball screw though, if so you'd need a way bigger motor or lower gearing to do it. 001 regularly, all of which is way more then is necessary for simple brackets) I would look at doing a CNC conversion on one of the small Asian made mini mills Jul 13, 2020 · SWI makes ProtoTRAK retrofit kits for bridgeports. CNC Retrofit Kits All CNC Retrofit Kits Upgrade your Bridgeport EZ-Trak, EZ-Path, or Boss with a Siemens 828D CNC System. 00 4" CNC Vise - $269 Clamp Set for 3/8" T-Slots - $53. May 27, 2011 · "Bridgeport Manuals A gift to the Bridgeport Community. $879. Call for Lead Time. now use double ball screws for even less backlash. You can run a 90 volt dc motor using 120v ac input power, or a 180v dc motor with 230v ac input power. You may have to register before you can post: click the register link above to proceed. Alpha has precision ball screw assemblies for CNC Bridgeport Mills. My machine is full 3 axis manual/CNC, I would be lost without the manual capability on all axes. That's a great choice for HF mills. Commercial ballscrew kit suppliers for Bridgeports are very proud of their product and prices in the $1500 -2500 range for just the table ballscrews come to mind. These were made as CNC, ballscrews, pressure oiling, a really nice quill where the ball screw is actually around the quill and not an add on that just wants to lever the quill sideways. I can see the allure of buying a pre-built solution though; Bridgeport Mills - Acu-Rite MillPWR G2 3-Axis CNC Kit. Spice up your Kit: 4 th Axis Rotary table: $1498. For a High-End CNC Retrofit application or when the existing drives and motors are obsolete, we recommend a Digital CNC System. The rf30 worked quite well, biggest issue I had was the backlash in the Z axis. ~3 NEMA 34 1380 oz/in 6amp/phase 4 wire steppers for $175 off ebay. By far, the most important benefit in a cnc machine. takes a lot of time. Retrofits using the KMX CNC are available as three-axis CNCs, with a quill drive for Z-axis machining. Hard to get new machinists used to the idea, but an older machinist will do easily as its what had to be done prior to CNC machines being able to surface parts. That said there really isn't much to these. The Centroid also offers optional CNC accessories such as Automatic Tool Height Measurement and Part Probing System that save time and bring new functionality to the machine tool. Sep 26, 2006 · The company does a lot of CNC retrofitting and may have a kit, don't know for sure, but Roland has written a lot of stuff about conversions. conversion kits will make the CNC Jr. I bought the kit including the 3hp 230v, 1ph, inverter rated motor. Re: Bridgeport Manual to CNC Conversion I have never seen a fix pulley Boss as far as I know they were all variable speed heads. While occasionally more expensive, it gives our customers the peace of mind that comes with having all new drives and motors. For a general overview of converting a mill to CNC, this might help-Mini Mill CNC Conversion using Thanks in advance. easier than ever to use while also giving you the ability to make cuts that are even more accurate. You'll be able to perform operations that simply weren't Jan 14, 2019 · Bridgeport did make good knee mills, but the American made versions (Boss 1 to Boss infinity) didn't hold up very well and it's hard to find one where the controls are still working. Condition: You might want to consider a old nc/cnc machine and retrofit it with a different controller, it'd probably be cheaper in the long run and get you an actual cnc machine. Kit, Mechanical. I replaced my grbl controller on my workbee, and have really loved it as a controller. retrofits. Both are removed reducing the footprint of the machine significantly. Conversion Kit. Reviews (0) SKU: ACUE82097101. Reply. 317-662-0185. EXPR/RF-31 CNC Conv. DIY more like $1900. The conversion take a decent bit of time though. Shopping around and waiting for deals may help Nov 18, 2009 · If this is your first visit, be sure to check out the FAQ by clicking the link above. Most people CNC convert these mills as a kit or project - it is quite a bit cheaper than buying an off-the-shelf conversion, and generally, the skillset needed to build the kit overlaps the skillset needed to run a CNC mill. Even buying an "old" CNC and updating it is a money losing proposition, from a strict resale point. It's a Grizzly G1006/7 I have effectively no knowledge of… Will use this 0. 2. The 1hp PM motor is okay, but not great once converted to CNC. Cost and Investment. However, when balanced against the productivity gains and expanded capabilities, the investment can quickly pay off. Item #. The X and Y scales plug directly into the MX controller and will give you Digital Readout directly through the MX software screen when choosing to hand crank your axes. One is a CNC Router, this has a really wide working area, sometimes up to 4’x8’, but a relatively shallow vertical space, usually 3”-12”. Bridgeport CNC. Bridgeport V2XT with DX-32 control CNC Retrofit Upgrade using many stock components and Centroid M39 CNC control upgrade kit. As a hobbiest, the CNC conversion was my only financial option--but even if you only have one job lined up an entry level HAAS will pay for itself extremely quick. com HiTorq 3990 (factory upgraded Seig X2) and 4 NEMA 23 140oz-in stepper motors and as the title says want to upgrade my manual benchtop mill to have CNC capabilities. With a Boss machine this only takes about 30 to 45 minutes. Here is a list of the main needs I have: Needs to fit through a roughly 32in doorway. I had a variety of control setups Servo Variable Frequency Drive Plus retrofit kit for Bridgeport type milling machine. Babin Machine Tool offers our Bridgeport miller rebuilding and CNC retrofit service, both at our shop and on-site. A CNC conversion kit is going to be ~$600 before motors and electronics. Price and SKU will update based on options selected. Similar Threads: Bridgeport cnc series 1 retrofit; New Machine Build-Another Series 1 Bridgeport Retrofit; Bridgeport Series 1 MK 2 retrofit; Bridgeport Series II un-retrofit. And I got the mist collector at a discount for $2,500. The old Boss 5 control has two cabinets, one on the right and one in the back of the machine. We are out of Hybrid Steppers 2-25-2021. Retrofitting an aging CNC system with a new FANUC CNC will save long term costs and boost the machine’s productivity while adding to the uptime, reliability and efficiency. So how much will it cost? A knee-mill (bridgeport) converted to CNC will cost anywhere from 10K-25K. Here's a pic of my control box, a bit of a mess, sorry. The time now is 06:53 PM. 11,154. Dec 3, 2015 · Feb 8, 2014. The end result is smooth, continuous 3-axis motion. 80 (For <$20, it's a nice form factor. High precision assemblies with Lead Accuracy of . Now Available! The PM-25MV CNC Mill is one of the most popular hobby mills out there. •. The boards costs $2300. Use the same setup to rough and finish. Dec 12, 2015 · The DC All-In-One board can run 3 Brushed DC servo's up to 15 amps. From Old School conventional guys, to CNC Programmers, to the… I'm interested in a CNC conversion kit for a Bridgeport mill that keeps the manual capabilities as well. Still a work in progress, but doing ok so far! Mini mill CNC upgrade/conversion I have a littlemachineshop. Cable Kit (Seems really unnecessary, and I have a lot of these cables already) Keyboard Cover . I dropped it over on its face getting it in the garage. 1kw @1:1 drives are MORE than powerful enough so you could use as low as perhaps 400w @2:1 reduction or perhaps 750w. The ATC cost me $3k, the enclosure was around $800 I think, the chip conveyor was around $1,000, the flood coolant was $500 (3/4hp pump and filter unit), 2hp belt driven spindle and VFD setup with drawbar and pneumatics was another $1k. So this is the start of my build thread. Learning Curve 218K subscribers in the Machinists community. Nov 6, 2018 · The MicroKinetics Bridgeport CNC Quill retrofit kit includes the mechanical components needed to convert the Z axis of your manual Bridgeport (or similar) knee mill for CNC operation. you're going to spend so much money on tooling, work holding, materials, etc - that's AFTER you have a machine, 3 phase, etc. PM-25MV CNC Mill Conversion Kit. Need assistance? Please call. Acu-Rite MillPWR G2 CNC Retrofit Kits. All components are precision engineered. MX Digital Probe: $379. A Reddit for Machinists of all varieties. Converting a Bridgeport mill to CNC does require a financial investment. buy some old maybe clapped out shit and figure out that it'll make money before dropping big bucks. It all depends on the speed you want to accomplish and the finish quality you are willing to accept. Sometimes you can get the mill for next to free. 02-26-2017, 06:00 AM #6. I think the prototrak stuff looks really nice but I don't think I can afford that any time soon. US $1,125. ProCutCNC is also too expensive at like $7k for a ready to run system. The home of building, modifying, and converting CNC machines of all shapes and sizes. Contact seller. Converted a Wells-Index 700 w/Bandit to a modern PC based full 3-axis control, and once I got used to the 'fly-by-wire' concept, it was a powerful tool in the repetoire. If your dc motor is single phase, it will work with your existing house power. More maintenance. The M-39 is modern Windows 10 (Windows 7 Link. The conversion cost me $2k. 900-0090-025. My Grandfather has asked me to assist with figuring out how to convert his Mill to a CNC. Most kits will have less than . Look for a BOSS 1 to 4 or an MDI machine. For lower cost 2-axis retrofit package, we offer the ProtoTRAK EMX control. The Sieg X2 CNC conversion kit is our most popular product, thanks to its DIY-friendly features, which include simple-to-follow user instructions. Aug 13, 2020 · A Bridgeport Series 1 CNC (Boss 3 as close as I can tell). Bridgeport Mill Retrofits. You can do the whole build for under 5 grand if you can do the work yourself, that should include a computer as well. Longer life and higher capacity due to True Gothic Arch Ball Form. 3 mm diameter flat end mill for the first time to make a small toothed pocket in ABS plastic using CNC Router. Is there anyone who has done this conversion and could comment on the quality and sanctification of this particular conversion? Jan 31, 2005 · All times are GMT +1. Every Ball Screw Is Hand Packed and Tested For Backlash. It condenses a normally long process The mill mechanical conversion kits contain the parts and ballscrews to do the conversion, without the motors, DriveRack, motion controller and Software. The newer and nicer set-up the more expensive it will be. I'm sure that there is someone that has had success doing this. Quantity. These scales will give you up to 0. Thanks! All three motors are the same--1400oz-in all in one servos, with the Z geared down 3:2. 001" Backlash. With off the shelf kit and motors/drivers you're looking at $2500. I will share with you next what I've learned along the way. Request A Quote. I saw in the comments that you used the kit from heavymetal CNC. You can purchase a decent SCR motor controller for as little as about $30. Think a Bridgeport mill with motors on it. Business, Economics, and Finance. Absolutely yes you can do that. ) Excluding. I found someone selling a kinetic on eBay that they never used since it was half the price of a new kit I figured it would work. A toolchanger makes the machine 20-fold more productive. Any tips regarding the cutting parameters (Speed, feed and depth and width of cut)? This machine is used daily and probably has over 1000 hrs. This specific mill is in the process of being converted to CNC right now. CNC conversion kits for Bridgeport mills are readily available in the market, and with the right tools and knowledge, you can transform your machine into a more efficient cutting monster in a matter of weeks. (I used shafts and couplers from Misumi and made adapter plates to mount the NEMA 34 bolt pattern to the bridgeports NEMA 42 mounts. 1. $1995. Comfortably cut aluminum, preferably able to handle steel as well. All DP500 DRO Kits include: DP500 DRO Display, Spherosyn LT Aug 4, 2006 · I do that a lot on my CNC to make tooling or simple operations that are cleaner, more accurate, and faster than on the manual mill sitting right across the isle. Powrr supply, Controller, drivers, motors and limit switches is just about all of it! Try r/hobbycnc too. Jan 2, 2018. Now standard BP can be either way. Hybrid Steppers. I will not buy a really old junk machine. mrb37211. This kit comes in 2 or 3 axis configurations, with travels ranging from 12” x 30” up to 16” x 36”. Looks like an awesome setup! Thanks is does work quite well I have been cutting EN24T high tensile steel on it today with decent results. 005", if you are really careful with setup and programing you might be able to get it down to . EXPR SQ/RF45 CNC Conv. This Bridgeport has only hydraulic movement, so you’d have to do a lot of fabricobbling and it would get really sketchy really quick. The mill can be run manually, as a two-axis or three-axis CNC. Many machinists swear that real Bridgeports out Apr 8, 2014 · Here's reality. 95 Jog Shuttle - $84. My mill G0704 conversion uses a 3hp (continuos) motor that will peak at 5hp. Dec 6, 2012 · Put another way, you will build a CNC bridgeport for triple or quadruple the cost of the BP, but it still won't be worth more than 25-30% of the money you have invested. Also, if you’re looking for a cost-efficient yet featureful CNC solution, this mill CNC conversion kit has it all. I have a standard Southbend/ Bridgeport clone 9x49 mill, I was wondering if anybody has converted one to full 3 axis cnc. Posted by u/OliStabilize - 6 votes and 16 comments Jul 3, 2021 · I recently purchased a bridgeport and decided to convert my g0704 to CNC. For Boss 1-7 equipped mills, our retrofit kit includes 3 brand new servomotors with 2000 line encoders. It had a lot of use but looked OK. Our CNC Jr. Like the original, it features heavy-duty construction and space-saving design and is easy to learn and operate. Mar 11, 2009 · The most basic answer seems to be: Spend as little as possible. I'm not sure how much they cost (I have a vague memory that I heard 8,000 somewhere, but don't hold me to that). The Little Machine Shop (LMS) Hi Torque 3990 mini mill is popular among hobbyists and professionals alike, and the LMS 3990 conversion kit is the best way to turn it into a CNC milling machine. YouTube - ‪Bridgeport Conversion‬‏ I have also scanned and posted the following manuals. Learn more about our CNC Retrofit Solutions. . I used BDtools G0602 conversion kit for the ball screws and nuts to save time and that it definitely did. Bridgeport Mills - Acu-Rite MillPWR G2 2-Axis CNC Kit. $5,799. 5K subscribers in the diycnc community. Curious on hearing thoughts about a 1960s era Bridgeport J Head as a hobby vertical milling machine and how feasible CNC conversion is. The servo I used for the spindle is a DMM technologies 1Kw 11A-DST-A6HK1 with a DYN4 AC Servo Drive DYN4-H01A2-00. Centroid CNC control board overview "Acorn" Step and Direction CNC controller kits "AcornSix" Six Axis CNC controller kits "Allin1DC" DC servo Closed Loop CNC controller kits "Hickory" Eight Axis EtherCat CNC controller kits "Oak" AC Brushless Closed Loop CNC controller kits; Turn-key CNC control I suggest you do what I did: G0704 mill + arizonavideo conversion kit (or Hoss DIY conversion). Order. Price. According to the American Precision Museum, Rudolph Bannow designed it. CNC controls for new machine tools as well as Retrofits for older NC machinery, such as Bed Mills, machining centers, knee mills, routers, lathes, vertical lathes, turret lathes, horizontal mills, vertical mills, bench top mills, and rotary tables. Mini Mill conversion is always a fun project. Bridgeport made a bunch of CNCs, for about the same price as a regular ol Bridgeport, you can get a Cnc version. In addition to the cost of the conversion kit, you may need to purchase new tooling, software, and accessories. So far I've dropped that number from $15K for a turn-key kit to about $3,500, which buys you the quill conversion hardware and rolled ball screws (investigating ground screws now). Converted Bridgeport mill: Takes a good amount of time to convert. 02 Keyboard - $19. Manual quill control is with our unique Electronic Handwheel. Affordable or steel. So we decided that it needed a conversion kit that would out perform the kits that are available today, By adding Double Ballnuts to our ball screws we have doubled the accuracy to the kits that are now If you are just looking to mill small aluminium parts with reasonable accuracy (maybe +-. CNC conversion based on Centroid Acorn system. There's also the Oak Board that can run four 3rd party servo's, its around $1800. At the end of the day, with a Bp, you will lack, in order of importance. Probably cheaper than a conversion kit and you'll be able to climb mill without all the backlash problems. They're not bulletproof, but close. Robust and reliable Hardened Steel Internal Ball Returns. PM-940M. A CNC retrofit with FANUC’s products can help businesses meet changing manufacturing requirements and customers’ evolving demands. Check out this video from Youtube of a MillRight M3, (their most inexpensive machine) milling So far my top contenders are the Sahpeoko HDM, which is a little over budget, something built from OneFinity and PWNCNC spindle kit, though that also seems costly, and maybe a CNC conversion fro ma mini mill, which also seems too time consuming. The retrofit kits are able to simplify complicated plans, such as the production of precision cuts, and their complex measurements. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. No Interest if paid in full in 6 mo on $99+ with PayPal Credit*. 3 axis kits are available with knee (16”) or quill (6”) options. Bridgeport. toolchanger. let alone rigging and install. Looking for a low cost (2-3k) CNC Mill. All components are precision engineered and include the hard anodized quill feed drive frame w/ size 34 motor mount, the ball screw and ball nut assembly, the Apr 2, 2023 · Learn how to convert a manual mill to CNC and how to add a number of upgrades, including servo motors, power draw bars, and VFDs! Nov 5, 2018 · The Bridgeport XY CNC retrofit kit includes the mechanical components needed to convert the X and Y axes of your manual Bridgeport or similar J-head type mill for CNC operation. TTS CNC Operator Set with Tormach Tool Assistant (32284) - $795. All Of Our CNC Conversion Kits. Accounting for back lash and worn screws etc. Serial number CNC1324. Got the y axis installed and made the cut into the saddle to handle the ball screw bearing Mar 15, 2015 · Being able to program for Z-axis moves in addition to the X and Y-axis will allow for shorter machining times. For buyers looking for a low-cost DRO kit, the DP500 is a great option. Have a decent work area, this is flexible but something around 8"x 8"x 6". CNC Jr. 68 votes, 14 comments. Bridgeport NorthStarZero. PM 25 CNC Kit - PM 30M CNC Kit - PM 940M CNC Kit. Mount the new CENTROID CNC control cabinet. The kit includes: (3) NEMA 23 stepper motor adaptors Bridgeport Retrofit Kits Offer Many Convenient Features: High-Capacity, Long-Life: Each ball nut assembly of the Rockford preloaded unit has one circuit of 3 1/2 turns of ball bearings. of operation on it. #2. Bridgeport quill ball screw conversion. 52K subscribers in the hobbycnc community. I know everyone has seen a lot of BP conversions so I’ll focus on the quill drive setup much like the Keith Elrod kit. About twenty years ago I bought a Bridgeport original CNC machine. While this job was all manual, this video provides insight into the capabilities of a G0704-class bench mill, which in turn provides insight on why they are such good candidates for CNC conversion - and light-years better than gantry routers for aluminum. qc mc pf yh jp ew tt zn dt sz