#1 I have two mills using r8 taper spindles. Looked at the speed ratios another way, the stock motor specifies 1730 rpm at 60 Hz 3-phase Bridgeport machine with a 3/4-HP DC drive motor. speeds for the four pulley steps are 660, 1115, 1750, and 2720 rpm. I do have number of the NMTB holder in both 40 and 50 taper. I dont have the capability to machine the pulley, what can I do? Bridgeport CNC Conversion - The Home Shop Machinist & Machinist's They do real nice work, we just had a HMC spindle rebuilt by them and it is virtually silent at 8k. The spindle speed table stamped on the head of the Bridgeport machine says the spindle recombatrobotics@gmail.com Try that with your VFD! The new motor is relatively tall and skinny, and therefore requires a custom mounting plate to adapt the face to the He used a KBCC-R controller and fabricated a box to house it, mounted on the left of the Ill get some pics up later of what I have. open-frame Minarik MM23001C (surpluscenter.com part number 11-2269) software. Building a DC Drive for the Bridgeport Spindle #1 For sometime I have been interested in a knee mill conversion. This presents an interesting dilema for a machine tool builde. Learn more about us. Bridgeport NMTB30 to Erickson Quick Change conversion The upper 206 brg should be open if using oil lube. Will the new motor fit my old pulley? However, in my experiments with DC motors for servo control, I acquired a number of permanent magnet DC R8 and 30 taper both have a 1 1/4" gageline diameter. We do not currently have a kit to fit the Variable Speed heads. the Bridgeport machine. For a better experience, please enable JavaScript in your browser before proceeding. Building a DC Drive for the Bridgeport Spindle.pdf File size: 680.8 KB Views: 601. can be geared down to a few rpm at over 65 ft-lbs, which translates to several tons of force on the edge of a 1/2" cutter. 2023 MicroKinetics Corporation | He used a 1 HP Pacific Scientific motor (new) You must log in or register to reply here. How to measure TIR of a hydrodynamic bearing spindle? maximum ratings (torque proportional to current supplied, speed proportional to voltage). Twice the size and weight of the Series I vertical milling machine, the Series II became known as a heavy-duty version of the Bridgeport mill while maintaining the accuracy and versatility of its older and smaller sibling. If you look at a cat 40 it does not have the shoulder, this is where you would install the pull stud. 2023 Copyright Practicalmachinist.com. By varying the step-pulley and backgear combinations, I can further vary speed and torque Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Meaning, you need not buy a Bridgeport mill conversion kit and get it converted to CNC unless you're looking to machine very complex designs. Register for the worlds largest manufacturing technology forum for free today to stay in the know. The M-39 is modern Windows 10 (Windows 7 or 8 is also compatible) CNC controller which brings this machine back to life with easy programming and operation. I have never seen a fix pulley Boss as far as I know they were all variable speed heads. The kit DOES NOT include a new drum switch, you must use your old switch. over other products on the market include: The Variable Spindle Speed kit includes the cabinet that mounts to the mill, a 2 or 3 HP VFD, emergency stop, This modified mounting successfully fit the random motor I happened to have to the machine. The kit includes (2) Nema 42 motor mounting plates, (2) motor pulleys, (2) lead screw pulleys, (2) motor and most Taiwan made Bridgeport clones. Real cost of Bridgeport CNC conversion? - Practical Machinist machining tool paths. Source power is 120 VAC single-phase house current instead of industrial 3-phase service. World-class Spindle Repair Services and Spindle Rebuilding since 1993. Register for the worlds largest manufacturing technology forum for free today to stay in the know. I hear what your saying Forest, though it would be nice to find someone that has opted for the Babin 4 bearing spindle conversion to see what if any difference they think it has made. # 30, # 40 and Erickson spindles are available. It will not stall even on the heaviest cuts." You are using an out of date browser. How to reverse bridgeport spindle - Shop Floor Talk This kit fits all Bridgeport J-head (Step Pulley) Milling Machines. Servo Variable Frequency Drive Retrofit Kit (VFD) for Bridgeport Type Bridgeport CNC Conversion Kit (Quill) #999-1000-151 February, 2004 -- June, 2010. compared to any method involving stock AC motors: For all their advantages, DC motors are not used much because both motors and controls are expensive, and the brushed The Kit Includes: New Baldor Reversible 1-1/2 HP Single Phase (115/230) Motor Mounting Plate & Hardware for Motor Adaptor Plate & Hardware for your Drum Switch Complete Mounting & Wiring Instructions Complete Support Through Our 800 Number (Provided). To make this complex cutout, I wrote G-code by hand for the CNC mill-drill machine, which cut and drilled the pattern using 1/4" and 3/8" end mills. with gear ratios in various steps from about 1.6 down to 0.046. The head houses the spindle and the quill. There are cheaper controls available that provide only speed regulation that would be suitable. Back geared head give 15 to 750 rpm and 100 to 6,000 rpm Available for 220/1/60, as well as 208, 230 and 460 three phasepower supplies. . Bridgeport CNC Conversion - YouTube These are ratios of 0.382, 0.645, 1.01, and 1.57 from the nominal 1730 rpm motor. This same controller can also be used to automate a lathe. Single Phase Conversion Kit for 1 HP Bridgeport Motor. R-8 spindle. password. You are using an out of date browser. Bridgeport / Romi Lathes > Best CNC Lathe Conversion - IndustryArena You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise. This was necessary to get the proper axial alignment of the motor to the machine casement, such that the drive pulley lines up with the 5/16" screws. reflect back to the prime mover as motor speed and torque requirements. I think Forrest Addy was contemplating this. bridgeport spindle r8 for sale | eBay You may notice that the adapter plate mounts oddly onto the motor, being bolted to the back side of the face flange, instead of normally on the front. This photo shows the finished project, with the blue motor and blue adapter plate installed on the the cat and bt 40 could run in a nmtb 40 splinde but you may need to change the length of your draw bar. Bridgeport / Hardinge and USA Light Iron | M head / r8 spindle swap compromised . when half the reason for wanting #40 is to gain rigidity. The Y axis selections Will the new motor fit my old pulley? assemblies are made of hardened steel for durability and long life. You can write simple part programs as well as use the built in wizards screens to generate Infinite variable-speed control of the motor. Brand New. literally that easy! Bearings - Bridgeport Milling Head Repair, Inc. This is a complete kit to convert your Bridgeport 3-phase motor to a Single Phase. DC motor characteristics are better matched to task loads compared to AC motors. in stepped nominal OD sizes of 3, 4, 5, and 6 inches, pitch diameters are 2.7, 3.7, 4.7, and 5.7 respectively, which match Building a DC Drive for the Bridgeport Spindle - The Jalopy Journal Bridgeport offered a factory 30 taper spindle. gas . Sorry guys, it is three phase. $150 for spindle used from Ebay. # 1 02-20-2019, 04:40 PM alchemist Elite Member Join Date: Jul 2009 Location: New Orleans Posts: 1,450 How to reverse bridgeport spindle I was using the bridgeport at work yesterday and couldn't figure out how to reverse the spindle. In this project, I replaced the original 1-HP 3-phase 230 VAC electric spindle motor on a You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise. If this is your first visit, be sure to This page was generated at 09:45 PM. This is well-matched to milling applications, where various speeds-and-feeds requirements There were a number of really awful import clones of the B'port all up and down Machinery Row sellers (Sante Fe Ave, in South El Monte). The resulting system slackness would appear to completely destroy any possible stiffness advantage of the four stack over any usefully high quality pair. Preloaded Ball Nuts: Each ball nut is preloaded to eliminate lost motion. attach the motor to the J-head. But it is primarly the cost of DC motors and drives preventing their use in machine tools. Bridgeport Milling Machine Tools NT40 Shaft Spindle Vertical Mill Parts | eBay, 1Set Bridgeport Mill Part Milling Machine NT40 Spindle + Bearings Assembly | eBay, Bridgeport VMC 2216 XV Spindle Taper - CAT40 or BT40, Change R8 spindle to 30 taper for Lagun ft2. $5 off every $100 with coupon. To learn more, please refer to the cookie policy. Top Left, Power on and off. This is a complete kit to convert your Bridgeport 3-phase motor to a Single Phase. JavaScript is disabled. You must log in or register to reply here. Stuck with Max of 1hp with current motor. For a better experience, please enable JavaScript in your browser before proceeding. With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. This one happens to be an Electrol model 790, likewise an eBay purchase for $75. The plate is cut from 5/16" thick aluminum sheet, on which I painted blue layout dye and scored layout axes and positions using a carbide He is in General New or at HSM. The original Bridgeport mill has a C Head, but the J Head is standard on most Bridgeport mills. Includes the following: All components are precision To mount the DC drive controller and power connections, I bent and flattened some 1/2" thin-wall electrical conduit This is a complete kit to replace your old Bridgeport 3-phase motor to a new 3-phase motor. The Kit Includes: New Baldor Reversible 1-1/2 HP Three Phase (115/230) Motor Mounting Plate & Hardware for Motor Adaptor Plate & Hardware for your Drum Switch Complete Mounting & Wiring Instructions Complete Support Through Our 800 Number (Provided). Bob used a new 3/4 HP Electrol motor he found on eBay. Register today and take advantage of membership benefits. The upgraded #40 spindle has 3 sets of 7008 P4 precision spindle bearings whereas most Bridgeport R-8 type spindles have only 2 sets of 7207 P4 bearings. the mechanical components needed to convert the Z axis of your manual Bridgeport Time to start the conversion. A VFD can be connected to one or the other and set up to do its thing on that motor. motor speed. If you do not have the machining capacity to remachine the pulley you can send us your pulley and we will bore and broach it for $70.00. All components are precision You can do the whole build for under 5 grand if you can do the work yourself, that should include a computer as well. Upper Right, Speed Control.". You can send us your pulley and we will bore and broach it for $70.00. . The ratios given by Bridgeport must include some significant belt slippage, since the pulleys are of obviously You Sir, are correct. DC motors and controls offer another solution to the power compatibility problem, while offering distinct mechanical advantages Another thing to think of is grease will have some "drag" but oil not so much. By adapting surplus, high-quality components, I was able to implement the superior characteristics the motor shafts to your machine's drive screws, plug in the cables, turn on the power, and install the software. Bob reports that he "wanted the reverse to perform dead spindle tapping; it works great. Bridgeport spindle runout - drawbar effect . Contact us for current prices. This is also well-matched to milling applications, where periods of heavy cutting intersperse The flattened end of the conduit at the front of the J-head holds the potentiometer which controls the Replacement and upgrade milling machine heads for Bridgeport mills and I also plan to use a VFD on the spindle, Norman12 has done some conversion already but would like to mount the spindle motor low if possible to . but this was not worth the effort for a non-functional aspect of a one-off part. Just couple Now standard BP can be either way. His mill is an Acra make, which is an imported Bridgeport copy, and which uses the Proper bearings for a mill spindle rebuild. engineered. They apparently are complete kits including ball screws. manual Bridgeport, Jet, Enco or most any similar J-head type mill for CNC operation. Floor Model Knee Mill Conversion Kit | MicroKinetics Bridgeport Interact Series1 Mk2 of this vintage - ones with a light grey fibreglass case as opposed to the earlier dark grey - use either a 5hp or 10hp DC motor for the spindle drive. This website or its third-party tools process personal data (e.g. Dec 21, 2007 Messages 448 Reaction score 0 May 27, 2008 #1 I just acquired an old Bridgeport mill (series 1 , J-head with step pulley) with a 1hp three phase motor. A complete pre-engineered package to automate your full-size Bridgeport, Enco, or similar size knee mill. The sealed ones won't give the proper load. Here is the drawing. We do not currently have a kit to fit the Variable Speed heads. No phase conversion needed, increase HP, simplisity. motor directly. Bridgeport Spindle 4 Bearing Conversion - Practical Machinist Machine Reconditioning, Scraping and Inspection. That is rather disgusting when trying to introduce a newcomer to the milling machine. Aside from the ears, the outside edge is only roughly cut on the band saw, since the mill-drill travel was insufficient to reach the Available lengths for the X axis are: 36", 42", 48" and 54" (these refer to the table lengths). Spindle Rotation is Always Correct Sensorless Vector Control . Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Anyone here converted a manual Bridgeport mill to CNC? The DC All-In-One board can run 3 Brushed DC servo's up to 15 amps. This is the 5 to 7-1/2 Hp head suitable for fitting to our Topwel, some Hurco, Webb and Kent machines. You must log in or register to reply here. browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. can immediately jog the motors by pressing Ctrl-J, and clicking on the X+, X-, Y+, Y-, Z+, and Z- buttons! Hand-written G-code for a shape like this involves some tricky trigonometry, and I had to make quite a few corrections to the code At the same time you are seriously compromising the motor's internal cooling fan by running the motor at reduced rpm. You 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. The switches on the motor control box are: Bridgeport / Hardinge and USA Light Iron | Converting R8 spindle to I dont have the capability to machine the pulley, what can I do? mill, replacing the original forward-off-reverse switch for the original 3-phase motor. SHARE POST #8. Bridgeport / Hardinge and USA Light Iron | M head / r8 spindle swap The empty hole just below will hold a manual on-off switch (for now I just use a socket strip) The static converter sucks @$$. The motor pulley will need to be machined to .8750 and a new keyway broached. If it has a single phase motor what are you talking about the static phase converter and the .66 HP bit???? It can be jumpered for 120 or 240 VAC input, and configured with switches and potentiometers for acceleration, Zig Zag Wanderer, Jul 23, 2011. We recommend the 42HT4000, The Bridgeport CNC Quill retrofit kit includes Bridgeport V2XT with DX-32 control CNC Retrofit Upgrade using many stock components and Centroid M39 CNC control upgrade kit. Bridgeport/Clone NT30 Spindle Questions | The Hobby-Machinist See also the 3D model [21 KB DWF file, The drive is a joy to operate, with the tiny dial giving complete control of the motor speed from 0 to 1750 rpm. This started as a rough hand sketch [drawing, 22 KB PDF file]. Kit includes a NEMA 42 motor mounting plate, motor pulleys, lead screw pulley, motor cover, drive All items are new. The drill holes can be simple down/up or with chip break cycles, chip However, because it was considerably more expensive, the Bridgeport Series . Works great. I never bothered with a proper enclosure for the control board, speed dial, and on-off switch, and being up and out of requires the free Autodesk DWF Viewer]. CNC Controller for Bridgeport V2XT DX-32 CNC retrofit - CENTROID CNC Bridgeport Series 2 Vertical Mill: How Is It Different From Series 1? - CNC Note that the Y axis length refers to the travel distance and not the table width. Easy-Access Lubrication: Lubrication of ball nuts made easy through 5/32" holes in the flanges. 05-10-2016, 10:16 AM. 3rd step for general work, this is more or less a 1:1 ratio of spindle to motor. Contact us | The two speed motor can be thought of as two motors with different operating characteristics in one housing. I have read many posts about conversions of all types. If you do a search on this board, you'll find a whole bunch of threads on Mr. Babin. The answer to that was the Bridgeport Series II. Bridgeport Manual to CNC Conversion - CNCzone.com designs require periodic maintenance for brush inspection and replacement. $75.00. :-) With the high / low gear change. Jan 23, 2021 1 2 Next K klandrith Registered Registered Joined Jan 5, 2021 Messages 6 Jan 23, 2021 #1 Hello, I have a Kent KTM-3S Bridgeport Clone that I purchased used that I am going to be cleaning up and repairing minor things on soon. belt, and all required bolts. With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. The two pictures below show the standard bearings on an R-8 Bridgeport. Sale. So, if I understand, you are primarily using the vfd to get 3 phase power for your mill from the single phase house current in your garage? You might search mcmaster.com or If you were shopping for appropriate items, you would want to consider an appropriate horsepower, and items for sale. motor. The cat and bt tooling is worth twice as much as the nmtb tooling. Building a DC Drive for the Bridgeport Spindle February, 2004 -- August, 2011. The spacer is integral with the preload. Let's go through the steps involved in this project. Lube is by gravity from the quill/spindle "drip" and the sealed bearings might collect oil above them. attached is a pdf for the Bridgeport conversion i got somewhere on the net Attached Files: bridgeport-dc-drive-motor-plate.pdf File size: 115.4 KB Views: 249. The Bridgeport Knee CNC retrofit kit includes the mechanical components needed to automate the knee of a manual Bridgeport, Jet, Enco or most any similar type milling machine for motorized control. The new spindle has the speed I need, I think a BP conversion can reach 4-5000 mm/min rapids which is where the mini-mill is set so thats no issue, ballscrews would provide the same accuracy as the mini-mill has presumably. This is the completed motor assembly before mounting. This website or its third-party tools process personal data (e.g. Why 40 taper? C&M Precision Spindle here in oregon does that conversion too. Personally, I would avoid any effect to overwork the spindle actions. include the hard anodized quill feed drive frame with a NEMA 34 motor mount, the ball screw and In the third video on the Bridgeport so far, I go over the steps I've taken to turn this once manual knee mill into a fully-fledged 3 axis CNC machine.00:00 Part Montage01:45 Overview \u0026 Head03:05 Motors \u0026 Axis06:45 Control Cabinets09:00 Feeds and Speeds11:00 Outro11:27 End CardsLink to costs \u0026 parts list google sheet: https://docs.google.com/spreadsheets/d/1qVT48VYJtAkDYthwZmxCNtdM6T63PqMHBiVyzXbq-Kc/edit?usp=sharingSee more info on Owen's Honors Learning Portfolio: https://owencokleylp.weebly.com/Check us out on Instagram: https://www.instagram.com/re_combat_robotics/Questions? programs for pockets and bolt hole circles. Peak and short-term delivered power can be multiples of the continuous rating. aluminum heat sink. All Rights reserved. The high speed bearings help in the upper speeds of the machine. BRIDGEPORT Part R8 Spindle Bearing Assembly For Taiwan Turret Milling Machine . There is a considerable literature seeking to demonstrate inherently superiour stiffness and load capacity of a four, relatively inexpensive, bearing bearing pack as compared to the conventional opposed pair of high quality bearings in spindle applications. Bridgeport Spindle 4 Bearing Conversion - The Home Shop Machinist Bridgeport CNC Conversion. The next thing I can see biting you is current limitations. I spent $300 on my conversion. most of the "Bridgeports" I see have a cam switch that changes motor speed and direction. Comment down below or email us! It's CONVERSION: Bridgeport Manual to CNC conversion scribe, ruler, caliper points, and a compass. If you do not have the machining capacity to remachine the pulley you can send us your pulley and we can bore and broach it for $70.00. FAQs: Bought a lovely machine from Norman12, thank you once again. Ok guys I have an update. If you look at a NMTB tool holder it has a shouder on the draw bar end. A VFD is not always the correct solution to motor control. If you are running a NMTB 40 tool in your machine know the only thing yoou will need to do is lenghten the draw bar. and a Dart DC controller (new) from eBay for a grand total of $110. The mounting of this plate, and therefore the center cutout, are rather unusual, because the axial alignment required that
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