Parts Drawings and Information
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Routine Maintenance Items
Tap Lubrication and Coolant: Jiffy-Tap units are properly lubricated at assembly, and should be checked periodically, especially if running under unusually severe conditions or located where coolant splash tends to wash lubricant off the spindle threads. Re-lubrication points are the spline end of the spindle, the switch slide bar, the switch fork, the switch fork disc, and lead screw threads. Access to these points is by removal of the switch cover, and the switch mounting plate. Coat the above parts with a high film strength grease. These lubrication points should be checked occasionally as a precautionary measure.
The felt wiper which keeps the spindle threads lubricated should occasionally be oiled with 10 to 20 weight engine or machine oil. Once a year it should be removed, cleaned, and re-oiled and replaced if worn. This spring loaded felt wiper clears chips off the spindle as it retracts, as well as lubricating the spindle threads.
Tapping or threading should be done with a good grade of lubricant/coolant. Your local supplier can recommend the best type for the material being worked.
It is best to have the coolant coming out of the tap flutes, toward the Jiffy-Tap if possible. This helps to wash out chips which otherwise would load the tap. This is especially important when cutting taper pipe threads because, as the tap is being retracted, chips fall into the threads and are crushed. On many jobs of pipe thread tapping, the coolant can be pumped through the bottom of the hole, and will flow outward toward the Jiffy-Tap. On jobs where this is not possible, the parts should be flooded with coolant to carry away chips and heat and to lubricate the tap.
Once each month put a very small shot of high film strength grease in the grease fitting located on the lead screw nut housing. Care must be taken when greasing the lead screw through the grease fitting. Excess grease will squirt out of the lead screw nut and become a potential chip collector. These chips would eventually work their way between the lead screw spindle and the lead screw nut, causing the lead screw to seize and lock-up. Remove any excess grease from the front of the lead screw nut.
Hydraulic Drive Motor: This motor is lubricated by the hydraulic oil and needs no other lubrication. Should the shaft seal ever need replacing, seal kits are available from the factory, complete with instructions.
Inspecting Lead Screws: The lead screws should be inspected for impacted chips, excessive wear and unusual wear patterns. The lead screws should be evaluated on a maintenance schedule that is in conformance with the environment that the tap is operating in.
Limit Switches: Routinely inspect limit switches for loose contacts, damaged trigger levers, broken or worn mechanisms, and general structural rigidity.
Removing the Lead Screw Spindle
To change to a different thread lead, the Jiffy-Tap spindle must be changed. Order additional spindles in any standard thread from 6 to 40 threads per inch, N.F., N.C., or metric.
No more than 5 - 10 minutes should be required to replace the spindle. Please follow these steps in sequence:
- Be sure to cut off all electrical power to the Jiffy-Tap unit before working on it.
- Loosen 3 screws and take off switch cover.
- Remove 4 socket head screws, which hold the switch plate, but do not remove the plate.
- Remove 3 socket head screws, holding the lead screw nut housing to front of Jiffy-Tap.
- Lift the limit switch plate, and the limit switch slide bar, just far enough to disengage the slide bar from the disc on the spindle.
- Pull out the complete spindle assembly from the front of the Jiffy-Tap.
Installing a New Lead Screw Spindle
- Screw the new lead screw nut and housing assembly on the spindle to about the same position as the old nut and housing on the spindle just removed.
- Insert the complete spindle assembly into the Jiffy-Tap body, lifting the slide bar slightly so the fork on the slide bar can clear the disc on the spindle. Slightly rotate the spindle to engage the spline.
- Lower the fork on the slide bar to engage the disc on the spindle. To check for engagement, move the spindle in and out. The slide bar should move with it.
- Position the limit switch plate. Insert and tighten 4 screws.
- Install and tighten the 3 screws which hold the lead screw nut housing to the Jiffy-Tap body. Caution: As you tighten these screws, be careful that the rear limit switch actuating bolt does not jam into and damage the rear switch, and that the spindle does not bottom out against the end of the hydraulic motor shaft, in case the lead screw nut was not positioned correctly when it was installed.
- Turn on electric power to the Jiffy-Tap unit.
- Cycle the unit under power, jogging it to see that the limit switch bar is operating and that spindle reversal takes place at the desired position.
- Set the position of the forward limit switch actuating bolt for the desired tapping depth and lock with the jam nut. The rear switch actuating bolt has been factory set to leave about 1/16" gap between the lead screw spindle and the end of the hydraulic motor shaft when spindle is retracted. It can be adjusted to leave more gap, if desired, but should not be set to allow the spindle to bump the motor shaft.
- Replace the switch cover.
Interchanging Hydraulic Motors
In setting up for a different job, the hydraulic motor can be interchanged with a different model which may have a more favorable ratio of torque and speed for the new job.
Remove four socket head bolts. Pull out the motor with spline sleeve still attached. The spline sleeve set screws are swedged in place and removal might be difficult. It is recommended when using interchangeable motors, that you keep the spline sleeve attached and not to swap sleeves between motors. If removal of sleeve is necessary, the swedge must be removed by deburring or a small end mill to remove swedge. Remove set screws, and pull spline sleeve off of motor shaft. Transfer motor ring if used, to the new motor shaft. Place the spline sleeve on new motor shaft, insert and tighten set screws. Plug the new motor assembly into the Jiffy-Tap body, engaging the spline sleeve with the spline on the spindle. Reinstall and tighten the four socket head cap bolts.
Recommended Spare Parts
At least one spare limit switch (part number J-282) should be kept on hand for replacement in an emergency. When replacing a limit switch, transfer one wire at a time from the old to the new switch, to avoid the possibility of getting the new switch wired incorrectly.
In high production applications an extra lead screw should also be kept on hand.
Locating Unit Serial Number
The unit serial number is located on the right side of the unit when looking at the spindle end. Be aware that the covers between units are interchangeable. Therefore, the part number on the cover may not be the correct part number of the unit. Consult the factory for determining the exact part number of your unit or locating the serial number. Serial number may be required when ordering replacement parts.
The factory can repair units or lead screws at a fraction of the replacement cost for units that need extensive repair or lead screw replacement. Each unit received will be evaluated and the best repair/replace scenario will be provided to the customer.