Yasda Precision Horizontal Machining Centers

Yasda PBR 400

$900,000 - $1,500,000 Updated 2026-03-16

Key Specifications

X Travel

400 mm (15.7 in)

Y Travel

350 mm (13.8 in)

Z Travel

350 mm (13.8 in)

Spindle Taper

HSK-A63

Tool Capacity

30 (standard)

Table Size

400 x 400 mm (15.7 x 15.7 in)

Overview

The Yasda PBR 400 is a precision boring and milling center derived from Yasda's jig borer heritage, optimized for the highest-accuracy bore location work on horizontal platforms. The PBR designation — Precision Boring and milling, with 400 mm table — reflects its primary use case: producing accurately located and dimensioned bores in precision manifolds, housings, dies, and instrument components where bore-to-bore positional accuracy is the critical specification.

The PBR 400 achieves ±0.0005 mm positioning accuracy on all linear axes with ±0.0002 mm repeatability, using a granite base structure and full-closed-loop linear scale feedback with 0.05 micron resolution. The horizontal spindle orientation favors chip evacuation in deep bore applications and provides inherent rigidity for boring bar operations. The 20,000 RPM, 11 kW (15 hp) inline spindle in HSK-A63 taper accommodates precision boring bars, reaming tools, and fine finish end mills, while the oil-cooled spindle and temperature compensation system maintain dimensional stability throughout extended boring operations.

Table size is 400 x 400 mm with X/Y/Z travels of 400 x 350 x 350 mm and a B-axis indexing rotary table for 4-axis work. Maximum workpiece weight is 400 kg. The FANUC 31i-B5 control provides boring-specific cycles, precision canned bore cycles with measurement integration, and thermal compensation. A 30-tool ATC handles the variety of boring, reaming, and milling tools common in precision manifold and housing work.

The PBR 400 is the machine of choice for manufacturers producing hydraulic manifold blocks with 20–50 precision bores per face, aerospace gearbox housings with bearing bore accuracy requirements, and precision instrument housings where bore pattern accuracy defines assembly performance.

Full Specifications

Parameter	Value
Table Size	400 x 400 mm (15.7 x 15.7 in)
X-Axis Travel	400 mm (15.7 in)
Y-Axis Travel	350 mm (13.8 in)
Z-Axis Travel	350 mm (13.8 in)
B Axis	Full 4th axis indexing, 0.001° resolution
Max Table Load	400 kg (882 lb)
Spindle Orientation	Horizontal inline
Spindle Taper	HSK-A63
Spindle Speed	20,000 RPM
Spindle Motor Power	11 kW (15 hp) continuous / 15 kW (20 hp) 30-min
Spindle Runout	<0.3 µm (TIR)
Rapid Traverse Rate	20 m/min (787 ipm) all axes
Feed Rate	0.001–10,000 mm/min
Positioning Accuracy	±0.0005 mm (±0.5 µm) full stroke
Repeatability	±0.0002 mm (±0.2 µm)
Scale Resolution	0.05 µm (50 nm)
Feedback	Full-closed loop, ultra-precision linear scales, all axes
Thermal Compensation	Spindle oil cooling, ambient temperature sensing and compensation
Base Material	Granite
Way Type	Ultra-precision linear guides
Tool Capacity	30 (standard)
Tool Change Time	5.0 sec (chip-to-chip)
CNC Control	FANUC 31i-B5
Machine Weight	7,500 kg (16,535 lb)

Specifications sourced from yasda.com — verified 2026-03-28

Strengths & Limitations

Strengths

±0.0005 mm bore-to-bore positional accuracy on a horizontal platform is the benchmark specification for precision manifold and housing bore work
Horizontal spindle orientation provides natural chip evacuation in deep bore applications — avoids chip re-cutting that degrades bore finish and accuracy
Granite base and <0.3 µm spindle runout ensure bore roundness and cylindricity quality that cannot be replicated on conventional horizontal machining centers
4-axis B-axis indexing enables multi-face boring in a single setup — critical for manifold blocks with intersecting bore patterns on all six faces
Sub-micron scale resolution enables real-time closed-loop correction during boring operations, maintaining accuracy as bore depth increases
Oil-cooled spindle prevents thermal growth at the boring bar reference point — essential for maintaining bore diameter consistency across a production run

Limitations

Price of $900K–$1.5M for a 400 mm table machine requires applications where boring accuracy is the primary constraint on part quality
20 m/min rapids limit cycle time for multi-bore manifold work with long X-axis traverses between bore positions
Temperature-controlled environment is recommended to achieve the full ±0.0005 mm specification — facility investment adds to total cost of ownership
30-tool ATC is appropriate for bore-centric work but limits tooling variety for complex multi-operation setups
Yasda lead times of 12–24 months require long procurement horizons — not suitable for immediate capacity expansion needs

Best For

Hydraulic and pneumatic manifold manufacturers producing complex multi-face manifold blocks with audited bore positional accuracy Aerospace and defense gearbox and transmission manufacturers where bearing bore diameter, roundness, and positional accuracy are certified per drawing Precision instrument and scientific equipment manufacturers producing sensor housings, spectrometer bodies, and optical instrument frames with critical bore patterns Fluid power and valve body manufacturers in aerospace, defense, and industrial automation sectors requiring documented bore-to-bore accuracy Master jig and fixture builders producing precision locating fixtures, boring bars, and reference tooling for production machine calibration

Frequently Asked Questions

01 How does the PBR 400 compare to the Yasda PMC430?

Both the PBR 400 and PMC430 are 400 mm class precision horizontal machines from Yasda with similar accuracy specifications (±0.0005 mm positioning). The PMC430 has an APC option and is slightly more oriented toward general precision milling and jig boring across multiple operation types. The PBR 400 is specifically optimized for bore-centric work — horizontal spindle orientation, boring-specific cycles in the control, and tooling configuration for precision boring bar operations. Choose the PMC430 for mixed precision work; the PBR 400 for bore-dominant manifold and housing production.

02 What is the practical bore accuracy achievable on the PBR 400?

Using fine boring heads (adjustable boring bars from Sandvik Coromant, Kennametal, or Seco) and optimized cutting parameters, the PBR 400 achieves bore diameters accurate to ±0.002 mm, bore roundness below 0.001 mm, and bore position to bore position accuracy within ±0.001 mm in production. These are production run results — individual reference parts can achieve tighter results with measurement and correction loops.

03 Can the PBR 400 integrate with in-process gauging?

Yes. The FANUC 31i-B5 control supports on-machine probing with Renishaw or Marposs gauging systems. Bore diameter measurement and automatic offset correction is fully supported — after boring, the probe measures the bore diameter and the control automatically adjusts the boring bar offset for the next part. This closed-loop diameter control is essential for maintaining bore accuracy across temperature shifts and tool wear in production.

04 What types of boring bars and tools are compatible with HSK-A63?

HSK-A63 is the standard precision taper for this class of machine. Fine boring heads from Sandvik Coromant (Silent Tools, Capto), Kennametal (KM63), Seco (Capto), and Marposs are all directly compatible or available in HSK-A63 mount. The short, rigid HSK connection is preferred over CAT or BT tapers for boring bar operations because it minimizes runout contribution from the toolholder itself — important when bore runout specs are in the 0.001–0.002 mm range.