Gear Type Teeth Distance Tapping Machine SB408G SB4516G and SB4516A
These machines drive the tap feed through a change gear train, and the feed setup carries a spring that takes up clearance in the drive, so the tap is extruded into the hole at its true pitch rather than being pulled or pushed off lead. That is what brings hole precision and thread cleanliness to the level the drawing ...
What This Machine Does
These machines drive the tap feed through a change gear train, and the feed setup carries a spring that takes up clearance in the drive, so the tap is extruded into the hole at its true pitch rather than being pulled or pushed off lead. That is what brings hole precision and thread cleanliness to the level the drawing asks for. Tapping depth is set on a depth knob, which makes blind holes repeatable instead of a matter of the operator watching the spindle. A fast-changing tapping chuck lets taps be swapped quickly and clamped firmly. The main drive and the feed system each have their own friction clutch, so if the tap meets an obstruction the drive chain disengages by itself instead of snapping the tap or the gear train. Safety is built in: an emergency stop button is placed within easy reach, and the change gear cover carries a safety switch that cuts the electricity when the door is opened. For volume work the electrical system supports spindle feed auto-circulation and spot-start single-circulation. The cast iron body carries a spindle taking M16 x 1.5 work and offers 4-pole speeds of 360 590 and 960 r/min.
Why Buyers Choose This Machine
- Change gear feed with a clearance eliminating spring holds the true thread pitch through the hole
- Depth knob sets tapping depth precisely so blind holes repeat without operator judgement
- Fast-changing tapping chuck cuts tap change time and clamps the tap firmly
- Separate friction clutches on the main drive and the feed disengage on an obstruction and save the tap
- Safety switch on the change gear cover cuts power when the door is opened
- Emergency stop placed within reach of the working position
- Auto-circulation and single-circulation spindle feed modes support bulk production
- Cast iron body damps vibration through the tapping cycle
Where Gear Type Teeth Distance Tapping Machine SB408G Earns Its Place
Problems It Solves
- Clearance in the feed drive lets the tap wander off pitch and tears the thread form
- Blind holes tapped by eye come out at different depths across a batch
- A tap that binds breaks and takes the hole and sometimes the part with it
- Slow tap changing eats the time saved by a powered tapping machine
- Open change gear covers are a real hazard on a machine that runs unattended cycles
Who It Is For
- Production shops tapping repeat parts in volume
- Component manufacturers tapping blind holes to a set depth
- Subcontract machine shops with frequent tap changes between jobs
- Fastener and hardware manufacturers
- Distributors supplying bench and column tapping machines
Application Scenarios
- Bulk tapping of repeat parts using the spindle feed auto-circulation mode
- Blind hole tapping where thread depth has to be held to a set figure
- Tapping M16 x 1.5 and similar fine pitch threads on machined parts
- Job work where taps are changed frequently between sizes
- Tapping in materials where taps bind and a clutch is needed to protect the tool
Technical Detail
Technical Features
- Change gear driven feed system
- Spring in the feed setup to eliminate drive clearance
- Tap extrusion feed for hole precision and thread cleanliness
- Adjustable tapping depth set on a depth knob
- Fast-changing tapping chuck
- Friction clutches on both the main drive and the feed system
- Emergency stop button at the operating position
- Safety switch on the change gear cover cutting electricity when opened
- Spindle feed auto-circulation and spot-start single-circulation for bulk production
- Cast iron machine body
Specifications
| Machine type | Gear type teeth distance tapping machine |
|---|---|
| Models | SB408G / SB4516G / SB4516A |
| Feed drive | Change gear with clearance eliminating spring |
| Depth setting | Adjustable by depth knob |
| Tapping chuck | Fast-changing type |
| Overload protection | Friction clutch on main drive and on feed system |
| Spindle speeds 4-pole motor | 360 590 960 r/min |
| Thread example | M16 x 1.5 |
| Production modes | Spindle feed auto-circulation and spot-start single-circulation |
| Safety | Emergency stop button and change gear cover power cut-off switch |
| Body material | Cast iron |
Figures above are taken from the product information we hold. Send us your application and we will confirm the exact specification for the model quoted.
How It Is Built and What Can Be Changed
Operations Performed
- Tapping
- Thread cutting
- Tap extrusion
Materials Handled
- Cast iron
Quality Control
- Change gear feed checked against the thread pitch before release
- Friction clutch slip point set and tested on both the main drive and the feed
- Depth knob repeatability checked over a series of blind holes
- Cover safety switch and emergency stop tested on the assembled machine
- Auto-circulation and single-circulation cycles run through before packing
Customisation Options
- Model selected from SB408G SB4516G and SB4516A for your thread capacity
- Change gear sets supplied for the thread pitches you cut
- Tapping chuck and collets specified for your tap shanks
- Supply voltage frequency and phase built for your market
- Operating language manual and control plate text prepared for your workshop
How It Compares With the Alternatives
| Gear type tapping machine SB6516 and SB6532 | The SB65 machines are the larger column machines to M32; the SB4 series adds the fast-changing chuck depth knob and auto-circulation cycles aimed at bulk repeat tapping |
|---|---|
| Lead-screw automatic tapping machine SB8030 | The lead screw machine drives the feed from a screw rather than change gears; the gear machine changes pitch by swapping gears which suits shops running many different pitches |
| Tapping on a drilling machine | A drilling machine has no pitch matched feed no depth knob and no feed clutch, so blind holes and tap breakage are left to the operator |
Running the Machine
Step 1
Fit the change gears for the thread pitch you are cutting
Step 2
Load the tap into the fast-changing tapping chuck and check it runs true
Step 3
Set the tapping depth on the depth knob and prove it on a scrap part
Step 4
Close the change gear cover so the safety switch allows the machine to start
Step 5
Select single-circulation for setting and auto-circulation for the production run
Step 6
Check the first thread for pitch and depth before releasing the batch
Step 7
Leave the friction clutches at their set slip point rather than tightening them to stop slipping
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Gear Type Teeth Distance Tapping Machine SB6516 SB6532 and SB6532A
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View Machine →Questions About Gear Type Teeth Distance Tapping Machine SB4
How is the tap protected if it binds?
The main drive and the feed system each have a friction clutch that disengages the drive chain automatically when the tap meets an obstruction, which is what prevents tap breakage.
Can it hold a set thread depth in blind holes?
Yes. Tapping depth is adjusted on a depth knob so the same depth is repeated across the batch.
Is it suitable for bulk production?
Yes. The electrical system supports spindle feed auto-circulation for continuous running and spot-start single-circulation for setting and short runs.
How quickly can taps be changed?
The machine uses a fast-changing tapping chuck so the tap is swapped and clamped firmly without dismantling the holder.
What spindle speeds are available?
360 590 and 960 r/min with the 4-pole motor. Tell us your thread sizes and material and we will confirm the speed set for your work.
What safety devices are fitted?
An emergency stop button at the operating position and a safety device on the change gear cover that cuts the electricity when the door is opened.
What are your trade and payment terms?
We quote FOB CFR and CIF. Payment is 30 percent by T/T with the order and 70 percent before shipment, or an irrevocable L/C at sight.
Request a Quote on the Gear Type Teeth Distance Tapping Machine SB4
Send us the work you need it to do, the voltage on your site and the port you ship to. We will come back with the model, the tooling and the lead time.