Product Description
The SZGH-46J is a 2-axis high-precision slant bed CNC lathe manufactured by Shenzhen Guanhong Technology Co., Ltd. (SZGHTECH). It processes bar stock up to 45mm in diameter and disk-type blanks up to Ø300mm, delivering a machining accuracy of ±0.0075mm — 33% tighter than the 36-series — and a best-in-class surface roughness of Ra 1.0μm. Powered by a 5.5kW servo spindle and supported by SZGH's self-made high-rigidity barrel spindle unit, the machine weighs 3,000kg and is built for the processing of large parts requiring the highest combination of precision and structural rigidity. It is widely deployed in aerospace component subcontracting, medical device manufacturing, precision mold parts, and automotive tier-1 supply chains where dimensional scatter across production batches must be minimised.
Parameter | Standard Value | Max Value |
Max. bar bore diameter | 45 mm | — |
Max. disk-type blank diameter (pellet) | Ø300 mm | Ø350 mm |
Max. workpiece length | 350 mm | 320 mm |
Single-side cutting depth (stainless steel) | 3 mm | 4.5 mm |
Machining accuracy | ±0.0075 mm | — |
Surface roughness | Ra 1.0 | Ra 1.6 |
Turning diameter (swing over bed) | 400 mm | — |
Square tool shank size | 20 × 20 mm | — |
Center height of tool holder | 50 mm | — |
Parameter | Standard Value | Max Value |
X-axis effective travel | 1,000 mm | — |
Z-axis effective travel | 400 mm | — |
X-axis rapid traverse | 20 m/min | — |
Z-axis rapid traverse | 20 m/min | — |
X-axis servo motor power | 1.5 kW | — |
Z-axis servo motor power | 1.5 kW | — |
Parameter | Standard Value | Max Value |
Max. spindle speed | 3,500 rpm | 4,000 rpm |
Spindle motor power | 5.5 kW servo | 7.5 kW servo (optional) |
Spindle nose taper | A2-5 | — |
Supported hydraulic chuck size | 8 inch | 10 inch |
Parameter | Value |
Footprint (L × W × H) | 2,120 × 1,620 × 1,920 mm |
Total machine weight | 3,000 kg |
Power supply | 380V / 50Hz (3-phase) |
Item | Specification | Standard Configuration | Optional |
Ball screw | Ø32 mm | Ball grinding precision grade | — |
Linear guide rail | Ø30 mm | H-class linear guide rail | — |
Spindle unit | — | SZGH self-made high-rigidity barrel spindle | — |
Spindle motor | 5.5 kW | Servo (server host) | 7.5 kW servo spindle |
Feed servo | 1.5 kW | SZGH Dongmechuan High Speed Servo | — |
CNC control system | Ac8F-G | SZGH proprietary | SZGH |
Bed type | 30° | Slant bed | — |
Base | — | Heavy-duty anti-deformation patented base | — |
Clamping | — | Hydraulic clamping | — |
All parameters listed are for reference. The configuration in the final purchase order and physical acceptance shall prevail.
The SZGH-46J's ±0.0075mm machining accuracy is the tightest tolerance specification in the SZGH CNC lathe lineup — 33% more precise than the ±0.01mm achieved by the 36-series machines. To put this in context: ±0.0075mm is approximately one-tenth the width of a human hair. Achieving this tolerance repeatably across a production batch of hundreds of parts requires not just a precise spindle, but a structurally rigid machine that does not deform under cutting load and does not drift thermally during a production shift.
The SZGH-46J delivers this through three compounding design decisions: a 3,000kg anti-deformation cast base (eliminating vibration-induced error), SZGH's self-made high-rigidity barrel spindle unit (minimising runout at the spindle nose), and a 30mm diameter H-class linear guide rail specification on a 32mm ball screw — both upsized from the 25mm components used in the 36-series. Each upgrade individually reduces dimensional error; together, they enable the ±0.0075mm tolerance that defines this machine.
At 3,000kg total machine weight — 1,200kg more than the 36-series — the SZGH-46J's base represents a fundamental jump in structural category, not just an incremental upgrade. The additional mass serves two precision-critical functions.
First, vibration damping: when machining 40–45mm stainless steel bar at 3–4.5mm single-side cutting depth, the cutting forces involved are substantially larger than in 35mm bar turning. A lighter machine base allows these forces to create micro-vibrations that manifest as chatter marks on the workpiece surface and dimensional scatter in the finished part. The 3,000kg base absorbs these forces completely.
Second, thermal stability: a heavier base has greater thermal mass, which means it takes longer to heat up and longer to cool down — but once at steady-state operating temperature, it stays there. Lighter machines cycle through larger temperature swings during a shift, causing the base to expand and contract in ways that shift axis zero points. The SZGH-46J's thermal stability means that the first part of a shift and the last part of a shift measure within ±0.0075mm of each other.
The SZGH-46J is equipped with SZGHTECH's own-manufactured high-rigidity barrel spindle — a critical departure from the bought-in spindle assemblies used in cost-optimised competitors. The barrel spindle design provides a larger bearing span than a conventional spindle, reducing the overhang moment at the chuck face and directly lowering spindle runout under cutting load. Combined with an A2-5 spindle nose (one size up from the A2-4 used in the 36-series) and support for 8-inch hydraulic chucks (10-inch optional), the spindle is designed for the larger workpiece diameters and heavier cuts that define the 46J's application range.
All spindle assemblies are dynamically balanced at the factory before shipment and test-run at maximum speed to verify runout before the machine is crated.
Every dimension in the SZGH-46J's drive train is upsized relative to the 36-series:
Component | SZGH-36J / 36Z | SZGH-46J | Benefit |
Ball screw diameter | Ø25 mm | Ø32 mm | Higher rigidity, lower flex under load |
Guide rail diameter | Ø25 mm | Ø30 mm | Greater load capacity, lower deflection |
Feed servo power | 1.2 kW | 1.5 kW | Higher axis force for aggressive cuts |
Tool shank size | 16 mm | 20 × 20 mm | Supports larger, more rigid tooling |
Chuck size (standard) | 6 inch | 8 inch | Handles larger diameter workpieces |
These are not cosmetic changes — each upsized component reduces the elastic deformation of the drive train under cutting load, which is a direct contributor to dimensional accuracy at the workpiece.
The standard 5.5kW servo spindle motor provides 2.5 times the power of the SZGH-25's 2.2kW motor and 37.5% more than the 36-series' 4kW — sufficient for sustained 3mm single-side cuts in stainless steel without spindle speed drop. For customers requiring even higher metal removal rates, the optional 7.5kW servo spindle is available, enabling 4.5mm single-side cuts in stainless steel and aggressive roughing passes in carbon steel and aluminum that shorten cycle times on high-volume production runs.
The SZGH-46J uses the Ac8F-G variant of the SZGH control system — a higher-specification controller matched to the machine's precision requirements. It retains full ISO G-code compatibility with Fanuc 0i-T conventions while providing the tighter interpolation accuracy and higher-resolution servo feedback loop required to consistently hold ±0.0075mm tolerance across production batches. English-language interface, remote diagnostic access, and SZGHTECH direct engineering support are included.
The SZGH-46J is suited for precision turning of copper, iron, aluminum, stainless steel (304/316/316L), and alloy steels in bar stock up to 45mm, and disk blanks up to Ø60mm. With hydraulic chuck, it handles single-piece production of parts within Ø350mm.
Structural fasteners, hydraulic manifold bodies, actuator shafts, landing gear components, precision bearing races — aerospace parts where dimensional tolerances are specified in microns and batch-to-batch consistency is a contractual requirement.
Bone screws, spinal implant components, surgical instrument bodies, dental implant abutments, endoscope housings — medical parts where ±0.0075mm accuracy and Ra 1.0 surface finish are functional requirements directly related to patient safety and device performance.
Transmission shafts, precision valve bodies, fuel injection components, ABS sensor rings — automotive parts produced at scale where tight tolerances determine fit, function, and warranty performance.
Core pins, ejector pins, slide components, precision inserts for injection molds — where the dimensional accuracy of the turned component directly determines the quality of every part the mold will ever produce.
High-pressure valve spools, servo valve bodies, precision cylinder pistons — hydraulic components where bore concentricity and OD tolerance directly affect system leakage and performance under pressure.
Material | Notes |
Stainless steel 304 / 316 / 316L | 3mm standard cut, 4.5mm max; servo spindle maintains speed under load |
Alloy steel (4140, 4340) | Suitable for automotive transmission and structural parts |
Titanium Grade 2 / Grade 5 | Consult SZGHTECH application engineers for recommended parameters |
Brass / Copper | Excellent surface finish; maximise spindle speed |
Aluminum alloys | High feed rates; Ra 1.0 surface finish achievable |
Carbon steel | Standard production material for all cycle types |
Comparison Item | |||
Max. bar diameter | 45 mm | 35 mm | 35 mm |
Machining accuracy | ±0.0075 mm | ±0.01 mm | ±0.01 mm |
Surface roughness (best) | Ra 1.0 | Ra 1.6 | Ra 1.6 |
Machine weight | 3,000 kg | 1,800 kg | 1,800 kg |
Spindle power | 5.5 kW servo (7.5kW opt.) | 4 kW | 4 kW |
Spindle unit | SZGH self-made barrel | Harbin angular contact | Harbin angular contact |
Ball screw diameter | Ø32 mm | Ø25 mm | Ø25 mm |
Guide rail diameter | Ø30 mm | Ø25 mm | Ø25 mm |
Feed servo power | 1.5 kW | 1.2 kW | 1.2 kW |
Tool shank | 20 × 20 mm | 16 mm | 16 mm |
Chuck size (standard) | 8" (10" opt.) | 6" (8" opt.) | 6" (8" opt.) |
X-axis travel | 1,000 mm | 600 mm | 600 mm |
Z-axis travel | 400 mm | 230 mm | 230 mm |
Spindle nose | A2-5 | A2-4 | A2-4 |
CNC controller | Ac8F-G | SZGH standard | SZGH standard |
Max. stainless cut | 4.5 mm | 3 mm | 3 mm |
Best application | Precision / large parts | Batch / medium parts | Batch / medium parts |
CE Certification — Compliant with European Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU.
ISO 9001 — SZGHTECH production and quality management system certified.
National High-Tech Enterprise — Certified by the Chinese Ministry of Science and Technology since 2018.
100+ Patents — Including anti-deformation base casting process, SZGH barrel spindle design, and SZGH CNC system software copyright.
The SZGH-46J achieves ±0.0075mm vs ±0.01mm on the 36-series through three compounding upgrades: (1) a 3,000kg anti-deformation base (67% heavier, absorbs cutting vibration more completely); (2) SZGHTECH's self-made high-rigidity barrel spindle unit with lower runout under load; and (3) upsized drive train components — Ø32mm ball screws, Ø30mm guide rails, 1.5kW feed servos — that reduce elastic deformation in the axis drive system. Each of these factors independently reduces dimensional error; together they enable the ±0.0075mm specification.
The SZGH-46J processes bar stock up to 45mm in diameter. For disk-type blanks (pellet feeding), the standard maximum is Ø60mm. With an 8-inch hydraulic chuck (10-inch optional), it handles single-piece parts up to Ø350mm.
The key differences are: bar capacity (45mm vs 35mm), machining accuracy (±0.0075mm vs ±0.01mm), surface roughness (Ra 1.0 vs Ra 1.6), machine weight (3,000kg vs 1,800kg), spindle power (5.5kW servo vs 4kW variable frequency), spindle unit (SZGH self-made barrel spindle vs Harbin angular contact bearings), ball screw diameter (Ø32mm vs Ø25mm), guide rail diameter (Ø30mm vs Ø25mm), and tool shank size (20×20mm vs 16mm). Choose the SZGH-46J when your parts exceed 35mm diameter, require better than ±0.01mm accuracy, or demand deeper cuts in stainless steel or alloy steel.
The SZGH-46J's 5.5kW servo spindle and 3,000kg rigid base are suited for titanium turning — titanium requires low cutting speeds, high rigidity (to prevent chatter), and consistent coolant flow. Contact SZGHTECH's application engineering team with your specific titanium grade (Grade 2, Grade 5/Ti-6Al-4V), part dimensions, and required tolerance for a recommended cutting parameter set before ordering.
The standard maximum is 3mm single-side, with a mechanical maximum of 4.5mm using the optional 7.5kW servo spindle. The 3,000kg base and servo spindle maintain consistent cutting force and spindle speed throughout deep stainless steel cuts — avoiding the speed drop that occurs on lighter machines under heavy load, which degrades surface finish and tool life.
Yes. The SZGH Ac8F-G controller uses standard ISO G-code compatible with Fanuc 0i-T conventions. All major turning cycles — G71 (rough turning), G72 (face rough), G73 (pattern repeat), G76 (multi-pass threading), G70 (finish pass) — are supported. Programs from Fanuc-controlled lathes require minor format edits. SZGHTECH provides bilingual English/Chinese programming documentation and remote commissioning support.
Standard configuration includes an 8-inch hydraulic chuck. A 10-inch hydraulic chuck is available as an option for larger workpiece diameters. The A2-5 spindle nose accommodates both chuck sizes without modification.
SZGHTECH provides a 12-month warranty on all mechanical and electrical components, excluding consumables. Replacement parts ship at no charge during the warranty period. Remote diagnostic support via WhatsApp video call is available 24/5. Local in-country service is available in countries with established SZGH agent networks (USA, Turkey, Romania, Russia, Egypt, Thailand, Mexico).
Standard production lead time is 20–35 working days from receipt of deposit. The SZGH-46J ships in a reinforced wooden export crate with full anti-rust treatment. Due to the 3,000kg machine weight, a 20-foot container typically accommodates 1–2 units. SZGHTECH's export team handles full customs documentation including commercial invoice, packing list, certificate of origin, CE declaration of conformity, and factory test report.
The SZGH-46J precision lathe is in active production use at:
Eastern Europe: Romanian aerospace subcontractors (precision shaft turning), Turkish automotive tier-1 suppliers (transmission components)
Southeast Asia: Vietnamese precision machining workshops (medical device components), Thai automotive tier-1 suppliers (fuel system parts), Indian aerospace subcontractors
Middle East: Saudi Arabian oil & gas component manufacturers, UAE precision engineering workshops
Americas: Mexican automotive tier-1 suppliers, US precision machining job shops (via SZGH regional distributors)
Need a CNC lathe capable of holding ±0.0075mm across a full production run on 45mm bar stock?
SZGHTECH's export team responds to all inquiries within 1 business day.
Email: export02@szghtech.com
WhatsApp / WeChat: +8618925223781
Model | Bar Capacity | Key Difference vs SZGH-46J |
45 mm + end & side milling | Adds 4+4 power heads (end-face + side-face live tooling) on the 46J platform | |
45 mm | Z-type variant of the 46-series — same mechanical spec, alternative panel layout | |
35 mm | Smaller bar, ±0.01mm accuracy — for parts not requiring ±0.0075mm precision | |
50 mm | Large swing (Ø500mm over bed), suits disc and flange parts |
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