Tsugami B075C
Key Specifications
bar capacity
main spindle speed
sub spindle speed
axes
main spindle motor
sub spindle motor
Overview
The Tsugami B075C is a 5-axis dedicated chucker (guide-bushless) CNC automatic lathe with 7 mm (0.275 in) bar capacity and a sub spindle for complete front-and-back machining. It's the full-capability version of the 7 mm chucker platform — all the benefits of guide-bushless operation (no remnant waste, cold-drawn bar stock, simpler setup) with the ability to do complete parts in a single cycle.
The main spindle runs at 15,000 RPM powered by a 1.1/1.5 kW (2 HP) motor, while the sub spindle gets 12,000 RPM with a beefier 2.2/2.5 kW (3 HP) motor. That power differential mirrors the B075-VR design, giving the sub spindle extra torque for aggressive backworking cuts. Four live tool positions allow cross-drilling, milling, and threading at working speeds. Total tool capacity is 21 positions on the opposed gang tool post.
Running on a FANUC 0i-TF control, the B075C sits in a 1,035 x 1,585 x 1,700 mm (65 x 44 x 67 in) footprint at 2,000 kg (4,409 lb). The rapid traverse rate of 32 m/min keeps non-cutting time minimal.
The dedicated chucker design is the right choice when your parts have low length-to-diameter ratios — typically under 3:1. Without a guide bushing, there's no remnant bar waste, no need for expensive precision-ground bar stock, and the machine is simpler to set up and maintain. For shops producing high volumes of complete short parts at 7 mm and under — think connector contacts with back-side chamfers, small medical pins with back-drilled features, or watch components requiring both front and back machining — the B075C delivers more cost-effective production than a convertible guide bushing machine.
Full Specifications
| Parameter | Value |
|---|---|
| Bar Capacity | 7 mm (0.275 in) |
| Main Spindle Speed | 15,000 RPM |
| Sub Spindle Speed | 12,000 RPM |
| Axes | 5 |
| Main Spindle Motor | 1.1/1.5 kW (2 HP) |
| Sub Spindle Motor | 2.2/2.5 kW (3 HP) |
| Tool Positions | 21 |
| Live Tool Positions | 4 |
| Rapid Traverse Rate | 32 m/min |
| Guide Bushing | Dedicated chucker (guide-bushless) |
| CNC Control | FANUC 0i-TF |
| Dimensions | 1,035 x 1,585 x 1,700 mm (65 x 44 x 67 in) |
| Machine Weight | 2,000 kg (4,409 lb) |
Specifications sourced from tsugami.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- 5-axis with sub spindle enables complete front-and-back part machining in guide-bushless mode
- No remnant waste and no need for ground bar stock — significant material cost savings at volume
- Sub spindle at 2.2/2.5 kW is more powerful than the main spindle for aggressive backworking
- 15,000 RPM main spindle delivers excellent surface speeds for 7 mm and smaller parts
- 21 tool positions with 4 live tools covers complex multi-operation parts
- Simpler setup and maintenance than guide bushing machines — no bushing clearance adjustments
Limitations
- Dedicated chucker limits part length — not suitable for long, slender parts requiring guide bushing support
- 7 mm bar capacity restricts the machine to small parts only
- No Y-axis capability on the main side restricts off-centerline milling options
- 4 live tool positions may be limiting for parts with many cross-holes or milled features
Best For
Frequently Asked Questions
01
Both are 5-axis 7 mm machines with identical spindle specs (15K main, 12K sub) and 21 tool positions. The B075-VR uses a convertible guide bushing for both Swiss-mode and chucker-mode operation. The B075C is a dedicated chucker only. Choose the B075C when all your parts are short (L/D under 3:1) and you want to save on bar stock costs. Choose the B075-VR when you need flexibility for both long and short parts.
02
Without guide bushing support, part length is limited by the collet's ability to maintain rigidity. For 7 mm diameter, practical limits are roughly 15-21 mm (L/D of 2-3:1) depending on material, tolerances, and surface finish requirements. Softer materials like brass allow slightly longer parts than stainless steel. For parts longer than about 3:1 L/D, you need the guide bushing support of the B075-VR.
03
Two sources of savings: (1) No remnant waste — guide bushing machines waste 20-30 mm per bar end, which is roughly 0.7-1% of a 3,000 mm bar. (2) Cold-drawn bar stock instead of precision-ground — savings of $0.50-$2.00/ft depending on material and diameter. On 7 mm 303 stainless running 1 million parts/year, annual savings can be $8,000-$20,000. The exact savings depend on volume, material, and bar length.
04
Yes, for short parts. Any part that runs in chucker mode on the B075-VR will run identically on the B075C — same spindle specs, same tools, same control. The B075C simply can't run parts in Swiss mode (with guide bushing). If all your 7 mm work is short parts, the B075C does everything the B075-VR can do for those parts, at lower per-piece cost due to material savings.
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