QK1322 CNC Mill-Turn Machine: The Big-Bore End of the BONANZA Line
Most CNC lathes top out at a 100 mm spindle bore. The QK1322 CNC mill-turn machine from BONANZA is not one of them. It swings 1000 mm over the bed, turns diameters up to 800 mm over a 1350 mm length, and feeds bar or tube up to 220 mm straight through an A2-15 spindle nose with a 240 mm bore. At 12,000 kg, it is a machine built to hold heavy, unbalanced work and take cuts without complaint.
Here is the spec sheet, then what each number means on the shop floor.
QK1322 Specifications at a Glance
| Parameter | QK1322 |
|---|---|
| Max. swing over bed | 1000 mm |
| Max. turning diameter | 800 mm |
| Max. turning length | 1350 mm |
| Max. swing over cross slide | 550 mm |
| Spindle nose type | A2-15 |
| Spindle bore | 240 mm |
| Max. bar capacity | 220 mm |
| X-axis travel | 450 mm |
| Z-axis travel | 1600 mm |
| Rapid traverse X / Z | 12 / 12 m/min |
| Machine size (L×W×H) | 4930 × 2770 × 2570 mm |
| Approx. gross weight | 12000 kg |
The 240 mm Spindle Bore Is the Headline
Read the bore spec first, because it decides what kind of work this machine can swallow. With a 240 mm spindle bore and 220 mm bar capacity, the QK1322 takes material that would not fit through a conventional lathe spindle at all. Pipe, tube, hollow shafting and round stock pass through the spindle instead of hanging off the chuck, which changes how you set up long parts.
The A2-15 nose matters just as much. It is a heavy front end, sized for large chucks and for the bending loads that come with big diameters. A machine that swings 800 mm will see interrupted cuts, weld seams and scale that lighter spindles would feel in the bearings; the A2-15 arrangement is there to keep that load out of the machine structure.
For shops that machine oilfield components, rollers, flanges or long hollow shafts, this bore rating is usually the difference between one machine and two setups. Work that needs both ends machined can be fed through, machined, and parted off without rechucking the whole length.
An Envelope Sized for Large Rings, Rolls and Shafts
The swing figures deserve a second look. The QK1322 swings 1000 mm over the bed and 550 mm over the cross slide, with 800 mm of maximum turning diameter. That spread matters: you can mount a large-diameter part, but the slide clears work only up to 550 mm above it, which is normal geometry for chucked jobs where the part body sits in front of the slide rather than over it.
Turning length is 1350 mm, backed by 1600 mm of Z travel so tools can approach and clear the part. X travel is 450 mm. Rapid traverse is 12 m/min on both axes; that is not a speed number to brag about, and BONANZA does not pretend otherwise. This is a 12-ton machine, and its job is removing material from big, stiff workpieces steadily, not shuttling a toolpost around at machining-center pace.
Where the QK1322 Sits in the BONANZA Mill-Turn Family
BONANZA builds the CNC mill-turn machines series from compact Y-axis composite lathes up to this heavy end, and the models do not really compete with each other. They cover different part envelopes:
- 2100LY is the entry composite machine: pallet-mounted turret, interpolating Y-axis, and 350 mm cutting diameter for parts that need turning plus light milling in one setup.
- TCK3100LY steps up to 750 mm swing, 1000 mm turning length and a ±100 mm Y-axis when parts get longer and need off-center milling.
- HTMC800S is the machining-center-style turn-mill with bigger X travel, for prismatic parts that need substantial milling, not just spot drilling.
- QK1322 sits at the large-bore end: 1000 mm swing, 240 mm bore and 12,000 kg of iron, for heavy turning of tubular and large-diameter work where the other models simply do not have the bore or the mass.
If your parts are round, big, and made of unforgiving material, the QK1322 is the one to check first. If they need real milling off the centerline, one of the Y-axis models is the honest answer.
Shop Floor Notes Before You Quote It
A few practical points. The machine measures 4930 × 2770 × 2570 mm and weighs about 12,000 kg, so delivery planning starts with floor load, door width and lifting capacity, not with the electrical connection. A machine this heavy earns its mass, but only if the floor under it is up to the job.
Think about chucking before you order. A full 220 mm through the spindle needs a chuck with a matching through-hole and, for long bar or tube, steady rest support at the outboard end. Talk to BONANZA about what you feed through it; the bore capacity is there, and the right workholding package makes it usable.
Chip handling is worth the money on this class of machine. Roughing big diameters in steel produces chip volume that a pan and a shovel will not keep up with, so plan a conveyor if you are buying for production rather than jobbing work.
Frequently Asked Questions
What is the largest bar the QK1322 can take through the spindle?
The spindle bore is 240 mm and maximum bar capacity is 220 mm. Pipe, tube and round stock up to that size can pass through the spindle. Actual usable bar size depends on the chuck and feeding arrangement you fit, so confirm with BONANZA for your specific setup.
Is the QK1322 a full milling machine?
The QK1322 is configured around heavy turning: X and Z axes, an A2-15 spindle and large-bore capacity, and BONANZA positions it as the big-bore specialist in the mill-turn family. If your parts need off-center milling, drilling and contouring in one clamping, the Y-axis models in the same series, such as the TCK3100LY or the 2100LY, are the ones designed for that work.
What floor space and weight should I plan for?
The machine is about 4930 × 2770 × 2570 mm with an approximate gross weight of 12,000 kg. Plan for a reinforced floor in the machine area, plus enough clearance around the machine for chip handling and maintenance access.
Get a Straight Answer for Your Parts
Spec tables settle the easy questions. The real one is whether the QK1322 fits the parts you actually cut, and that is a conversation, not a datasheet. Send BONANZA your drawings or a list of typical jobs and get a direct recommendation: whether the QK1322 CNC mill-turn machine is the right machine, or whether a TCK3100LY or an HTMC model makes more sense for your work. Browse the full CNC mill-turn collection or contact the BONANZA team through the website.