TRAK TC820si
Image: southwesternindustries.com, TRAK Machine Tools
Key Specifications
Max Spindle
Spindle Power
Max Turn Length
max swing
max turning diameter
standard turning diameter
How much does the TRAK TC820si cost?
Price estimate
We do not have a price for the TRAK TC820si that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The TRAK TC820si is a turning center built around a 7.88 in (200 mm) chuck on an A2-6 spindle nose, with a 12-station bolt-on turret and a tailstock. Maximum turning diameter is 8.66 in (220 mm), maximum turning length is 20 in (508 mm), and bar up to 2.56 in (65 mm) passes through the 3 in (76 mm) spindle bore.
The spindle is belt driven and runs 10 - 4,000 rpm. TRAK gives two power figures at 480V: 38 hp (28.3 kW) peak and 14.75 hp (11.0 kW) continuous. Maximum torque is 100 ft-lbf (136 Nm) at 2,000 rpm. Plan sustained roughing around the continuous figure; the peak rating is what is on hand for short heavy cuts and for acceleration.
Read the capacity figures together. Swing is 15.75 in (400 mm), yet the largest diameter the turret can turn is 8.66 in (220 mm), and the standard turning diameter is 8.27 in (210 mm). X travel is 6.90 in (175 mm). Z travel is 20.8 in (528 mm), and the 20 in (508 mm) turning length varies with workholding, so a deep chuck or long jaws take length away. For shafts, the tailstock quill is MT4 with 4.13 in (105 mm) of travel and up to 692 lbf (3,078 N) of thrust.
Turret tooling is 0.75 x 0.75 in (19 x 19 mm) shank, with boring bars up to 1.5 in (38 mm). Rapids are 787 ipm (20.0 m/min) on Z and 590 ipm (15.0 m/min) on X, and the door opens 22.64 in (575 mm).
This is a 480V machine, drawing 38A full load on three-phase. A transformer option allows 208V, at 87A. It measures 117 x 80 x 65 in (2,972 x 2,032 x 1,651 mm), weighs 8,000 lbs (3,629 kg), or 8,500 lbs shipping, and carries 33 gal (125 L) of coolant with a pump rated 5.3 GPM @ 30 psi, plus 12 gal (45 L) of hydraulic oil.
Full Specifications
| Parameter | Value |
|---|---|
| Max Swing | 15.75 in (400 mm) |
| Max Turning Diameter | 8.66 in (220 mm) |
| Standard Turning Diameter | 8.27 in (210 mm) |
| Max Turning Length | 20 in (508 mm) (varies with workholding) |
| X Axis Travel | 6.90 in (175 mm) |
| Z Axis Travel | 20.8 in (528 mm) |
| Rapid Traverse Xyz | 787 ipm (20.0 m/min) on Z; 590 ipm (15.0 m/min) on X |
| Spindle Nose | A2-6 |
| Chuck Size | 7.88 in (200 mm) |
| Bar Capacity | 2.56 in (65 mm) |
| Spindle Bore | 3 in (76 mm) |
| Drawtube Thread | M74 x 2.0 x 35 mm |
| Spindle Drive | Belt drive |
| Max Spindle Speed | 10 - 4,000 rpm |
| Spindle Motor Power | 38 hp (28.3 kW) peak / 14.75 hp (11.0 kW) continuous (480V) |
| Spindle Torque | 100 ft-lbf (136 Nm) max. at 2,000 rpm |
| Turret Stations | 12 Stations, bolt-on turret |
| Tool Shank Size | 0.75 x 0.75 in (19 x 19 mm) |
| Max Boring Bar Diameter | 1.5 in (38 mm) |
| Tailstock Quill Travel | 4.13 in (105 mm) |
| Tailstock Quill Taper | MT4 |
| Tailstock Quill Thrust | 692 lbf (3,078 N) max. |
| Power Requirement | 480V, 3P, 38A full load; 208V with transformer option, 87A |
| Machine Dimensions | 117 x 80 x 65 in (L x W x H) (2,972 x 2,032 x 1,651 mm) |
| Machine Weight | 8,000 lbs (3,629 kg); 8,500 lbs shipping |
| Door Opening | 22.64 in (575 mm) |
| Coolant Capacity | 33 gal (125 L) |
| Coolant Pump | 5.3 GPM @ 30 psi |
| Hydraulic Oil Capacity | 12 gal (45 L) |
Specifications sourced from southwesternindustries.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 2.56 in (65 mm) bar capacity through a 3 in (76 mm) spindle bore, on an A2-6 nose with a 7.88 in (200 mm) chuck
- 38 hp (28.3 kW) peak and 14.75 hp (11.0 kW) continuous at 480V, with 100 ft-lbf (136 Nm) of torque at 2,000 rpm
- 12-station bolt-on turret, against the 8 stations of the TC2
- Tailstock with an MT4 quill, 4.13 in (105 mm) of quill travel and up to 692 lbf (3,078 N) of thrust
- Rapids of 787 ipm (20.0 m/min) on Z and 590 ipm (15.0 m/min) on X
Limitations
- The 38 hp (28.3 kW) figure is a peak rating; continuous power is 14.75 hp (11.0 kW)
- Maximum turning diameter is 8.66 in (220 mm) despite the 15.75 in (400 mm) swing, with 6.90 in (175 mm) of X travel
- Wired for 480V; a 208V shop needs the transformer option and an 87A supply
- Turning tools are 0.75 x 0.75 in (19 x 19 mm) shank and boring bars stop at 1.5 in (38 mm)
- The 20 in (508 mm) turning length varies with workholding, so usable length depends on the chuck and jaws fitted
Best For
Frequently Asked Questions
01
2.56 in (65 mm). The spindle bore is 3 in (76 mm), the nose is A2-6 and the chuck is 7.88 in (200 mm). The drawtube thread is listed as M74 x 2.0 x 35 mm, which is the figure to have ready when ordering other workholding.
02
At 480V the spindle is rated 38 hp (28.3 kW) peak and 14.75 hp (11.0 kW) continuous. Maximum torque is 100 ft-lbf (136 Nm) at 2,000 rpm. The spindle is belt driven and covers 10 - 4,000 rpm.
03
Maximum turning diameter is 8.66 in (220 mm) and the standard turning diameter is 8.27 in (210 mm), inside a 15.75 in (400 mm) swing. Maximum turning length is 20 in (508 mm) and varies with workholding. Axis travels are 6.90 in (175 mm) in X and 20.8 in (528 mm) in Z.
04
Yes. The table lists a tailstock quill with an MT4 taper, 4.13 in (105 mm) of travel and a maximum thrust of 692 lbf (3,078 N). Check that thrust against the support a long or heavy shaft needs.
05
480V three-phase at 38A full load. With the transformer option it can run from 208V, where the full-load current is 87A. The spindle power figures TRAK publishes are stated at 480V.
06
The TC2 is the smaller turning center: 12 in (305 mm) of swing, 11 in (279 mm) of turning length, an 8-station turret, 7.5 hp (5.6 kW) and 3,087 lbs (1,400 kg). The TC820si has 15.75 in (400 mm) of swing, 20 in (508 mm) of turning length, 12 stations, 14.75 hp (11.0 kW) continuous and weighs 8,000 lbs (3,629 kg).
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