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Application and Features
Features
- Depth control
- After the machine spindle travel stops, the tap advances 0.140" ± 0.004". For example: to achieve a tap depth of 1.000", stop the spindle at 0.860". The tap will advance an additional 0.140" to 1.000" deep.
- Set the torque as high as possible within the safe limits of the tap. The NC machine cutting feed equals (Tap Pitch x Spindle RPM). The reverse feed equals 2 X (Tap Pitch X Spindle RPM).
- Right or left-hand yapping without modification; re-entry cushion
- Please do not use the self-reversing tapping heads as drill chucks.
- Guaranteed depth control; within ±0.004"
- Chatter-free clutch has positive engagement which allows for a smoother, more accurate operation and more rapid reversal
- Radial Float is self-centering to compensate for hole center misalignment
- The unique Double Spring mechanism produces automatic feed and cushion drive. There are 2 springs for the feed and 2 springs for the reversal
- Pre-set torque control permits easy operation of tap brake torque control
- Head comes complete with 2 collets
- Accusize Self - Reversing Tapping Head are Featured of a reversible rotation, overload protection, and adjustable torque as well as advantages like a compact structure, high efficiency, safe and reliable, and simple operation.
- Working range: The chuck can be supplied with three specifications for various taps from M2 to M20, with their working ranges referring to the following table, and can be selected for connecting with the machine tool based on the machine spindle tapered hole. Adapters with a taper of MS-JT3/6/33 or MS-M16/20 are attached.
Main Technical Specification
- 2600-4002 package along with arbor MT1-JT6, MT3-JT6
- 2600-4012 package along with arbor MT3-JT6, MT4-JT6
- 2600-4022 package along with arbor MT3-20mm Thread, MT4-20 mm Thread
Operation Instructions of Accusize Self-Reversing Tapping Heads: Method and Step
Figures 1
- Mounting the chuck: Clean up the connecting parts of both the adaptor and the chuck and mount them onto the machine spindle after they have been assembled.
- Mounting the tap: Insert the tap into the chuck while watching the position of the tap handle from a window. Then, insert the square end of the tap handle into the square hole of the clamping device and tighten the lock nut with a wrench prior to fastening the top screw of the clamping device.
- Mounting the brake rod: Referring to Figures 1, the brake rod which should be of a certain rigidity to withstand the torque of a reversing tap(A rod made of steel 45#,20-30, HRC45 is recommended) is mounted either on the nonrotating part of the spindle end or on the worktable.
- Adjusting the torque: A proper torque shown with numbers 1, 2, 3, 4 on the main body periphery is selected according to the diameter to be topped and the material of the workpiece, showing that the chuck can stand the torque varies from small to large and can be selected by the operator himself. In case of materials which are difficult to be tapped, two operations are recommended.
- Tapping: The operator should align the tap mounted on the machine tool with the machined screw blank hole on the workpiece and operate referring to Figures 2.
Figures 2
1
Lower the spindle to the maketap get contact with the work-piece, and ready to be cutting.
2
Start tapping with the machine spindle moving down along with the chuck.
3
Stop the axial movement of the machine spindle upon approaching to the desired depth, meantime the chuck spindle will continue to tap until the extended amount of chuck is reached, then it is automatically stopped to rotate.
4
Raise the machine tool spindle, then the chuck spindle and the tap is automatically rotated in reversibly direction and retreated rapidly.
5
The raising of the machine spindle should be in correspondence with the retreating speed of the tap. Otherwise, the tap will stop at one time and act at another time.
6
The tap starts a positive rotation as soon as it has fully withdraw from the workpiece.
P01 arbor, P02 elastic ring, P03 adjust nut for clutch, P04 pin, P05 hex head socket screw
P06 trust bearing, P07 pad, P08 cluth spring(big), P09 cluth spring(small), P10 case
P11 pin, P12 spring washer, P13 cluth ring, P14 ball, P15 buffer spring
P16 pad, P17 driver, P18 bearing, P19 bearing pad, P20 driving spindle screw
P21 driving jaw, P22 return driving spring, P23 return gear, P24 reset spring, P25 pad for return gear
P26 pin, P27 gear, P28 bearing stage, P29 bearing, P30 bearing pad
P31 slit ring, P32 eleatic ring, P33 thrust stop, P34 stop bar, P35 hex head socket screw
P36 hex head socket screw, P37 driving spindle, P38 block, P39 double-thread screw, P40 eleatic ring
P41 flexible collet, P42 pad, P43 nut
Gary Conway
Reviewed in the United States on April 27, 2023
I have purchased a number of Accusize products, collets, counterbores, broaches and tool holders and have been very pleased with quality and usability. This product, however, was a total letdown.. it struggled to drive a 1/4-20 tap through 1/2 inch aluminum, with the torque setting at max, it still struggled and I had to plunge several times to make the threads. I disassembled the unit to make sure something wasn't simply broken, but all was fine and ample grease. I believe the problem is a design flaw.
K&L Shop Guys
Reviewed in the United States on October 11, 2022
Seized up after about 200 tapped holes
Patrick Martin
Reviewed in the United States on September 4, 2021
Works amazing!!!
Paul A.
Reviewed in the United States on September 4, 2020
Jammed right up into my MT2 spindle and stuck good. Wedged out just as easily. Nice delicate feel. It makes you fast!
Brian
Reviewed in the United States on May 12, 2019
Worked well and as described. We tapped over 2400, 5mm holes the first day we had it.
Shannon Fischer
Reviewed in the United States on December 21, 2019
Works perfectly for tapping holes. The blue plastic cases dosnt come with this tool tho. You can tap holes safely and fast with this set up.
Baumann
Reviewed in the United States on November 21, 2018
had a problem with the the unit, it was resolved the same day.
Mary K Hubert
Reviewed in the United States on November 11, 2018
My wife and I are in the process of starting up a machine shop that specializes in small precision parts in metals and plastics. We have a small CNC VMC in our garage and are manufacturing parts for high technology companies that typically sub contract their "high mix, low volume" or prototype work out to maintain tight schedules in their shops. We like to do our "secondary" work outside our CNC to minimize cycle times and keep busy during "cycle on" time.We are trying to keep our budget under control where we can and Procunier or Tapmatic tapping heads though smooth and reliable were also in the $800 range and was a place where we decided to save some money.I was skeptical because, to be honest, the unit "looks" like a "knockoff" or "counterfeit".Let's be clear, it doesn't look as polished or high end as the two previously mentioned brands but the operation is professional, repeatable and smooth. I've tapped 4-40 to ¼-20, I've even tapped 10-24 and fine threads, coarse threads tap smoothly with precision and repeatability. Tapping blind holes to proper and repeatable depths is no problem. The instructions explain exactly how much the tap advances after reaching the quill stop so you can control the tapping depth. The amount it advances is .140", just to let you know and it's precise! By the way if you need to tap left hand threads go ahead, the torque are simply rests against the right side of your torque stop, no modification required.The first few hundred holes were a little stiff and it took a little while to "break in" but after that this tool was as good as the Tapmatic 30x I use at work. By the way, the rubber and steel flex collets are numbered like the Jacobs ones and I suspect are the same. Like the 30x there are no back jaws, just two opposing set screws. The reason I mention this is because it's obvious this is a direct alternative for the Tapmatic 30x and so far it's been most satisfactory!The clutch is adjustable like the Tapmatic and I still have to give it more time but so far we're really happy with it. If it lasts for a few months we can justify a Tapmatic but I am optimistic this Accusize tapping head is going to last a long time as it seems to be a very good value.We've tapped about 1,200 holes so far and based on how it operates I think it's going to last for a long while. Honestly I can afford a Tapmatic or Procunier head with the amount of work we're already doing but right now we're happy saving money.It's a decent looking tool too, something you'll be proud to have in your shop. If you drill holes that are properly sized, use high quality taps and use good metal cutting fluids such as Tap Magic or equivalent, this tapping head will cut threads as well as heads that cost twice the price.
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