Carbon steel
45#40MnQ2351045
General shafts, plates and structural parts, quench and temper available.
Machining capability
Equipment, tolerance and inspection data
42 sets of equipment across turning, milling, grinding, gear cutting, wire EDM and heat treatment. Every value below is a measured or rated specification, listed so engineers can check feasibility before sending a drawing.
Equipment list
Machining and finishing equipment
Model, quantity, maximum machining size, positioning accuracy and repeatability for each machine group.
| Equipment type | Model | Qty | Max machining size | Accuracy | Typical operation |
|---|---|---|---|---|---|
| CNC lathe | CK6150 / 1000 | 8 | Ø500 × 1000 mm | Positioning ±0.005 mm, repeatability ±0.003 mm | Shafts, bushings, rollers, threaded parts |
| CNC turning center | CKX46 / 65 | 6 | Ø65 × 400 mm, bar feeder | Positioning ±0.003 mm, repeatability ±0.002 mm | Small diameter batch turning |
| Vertical machining center | VMC850 / 3-axis | 7 | 800 × 500 × 500 mm | Positioning ±0.006 mm, repeatability ±0.004 mm | Brackets, die plates, housings |
| Vertical machining center | VMC1160 / 3-axis | 3 | 1100 × 600 × 600 mm | Positioning ±0.008 mm, repeatability ±0.005 mm | Large die plates and machine frames |
| Cylindrical grinder | M1420 × 1000 | 4 | Ø200 × 1000 mm | Diameter IT6, roundness 0.003 mm | Shaft journals, scale shafts |
| Surface grinder | M7132 | 3 | 320 × 1000 mm | Flatness 0.005 mm/300 mm, Ra 0.4 | Die faces, guide blocks, flat parts |
| Gear hobbing machine | YKX3132M | 2 | Module 0.5 - 8, Ø320 mm | GB/T 10095 grade 7 - 8 | Spur and helical gears |
| Wire EDM | DK7740 | 3 | 400 × 500 × 250 mm | ±0.01 mm, Ra 1.6 | Die inserts, sharp corners, hardened parts |
| Milling machine | X6325 | 4 | 320 × 800 mm | ±0.02 mm | Secondary features and repair work |
| CNC lathe with live tooling | CK6432 / Y-axis | 2 | Ø320 × 600 mm | Positioning ±0.004 mm | Turned parts with milled features |
| Hydraulic press | YH27-100T | 1 | 100 ton | Parallelism 0.05 mm | Straightening and forming |
| Heat treatment furnace | RJ-75 / vacuum quench | 2 | 600 × 900 × 400 mm | Temperature uniformity ±5 °C | Quenching, tempering, carburizing |
Equipment typeCNC lathe
ModelCK6150 / 1000
Qty8
Max machining sizeØ500 × 1000 mm
AccuracyPositioning ±0.005 mm, repeatability ±0.003 mm
Typical operationShafts, bushings, rollers, threaded parts
Equipment typeCNC turning center
ModelCKX46 / 65
Qty6
Max machining sizeØ65 × 400 mm, bar feeder
AccuracyPositioning ±0.003 mm, repeatability ±0.002 mm
Typical operationSmall diameter batch turning
Equipment typeVertical machining center
ModelVMC850 / 3-axis
Qty7
Max machining size800 × 500 × 500 mm
AccuracyPositioning ±0.006 mm, repeatability ±0.004 mm
Typical operationBrackets, die plates, housings
Equipment typeVertical machining center
ModelVMC1160 / 3-axis
Qty3
Max machining size1100 × 600 × 600 mm
AccuracyPositioning ±0.008 mm, repeatability ±0.005 mm
Typical operationLarge die plates and machine frames
Equipment typeCylindrical grinder
ModelM1420 × 1000
Qty4
Max machining sizeØ200 × 1000 mm
AccuracyDiameter IT6, roundness 0.003 mm
Typical operationShaft journals, scale shafts
Equipment typeSurface grinder
ModelM7132
Qty3
Max machining size320 × 1000 mm
AccuracyFlatness 0.005 mm/300 mm, Ra 0.4
Typical operationDie faces, guide blocks, flat parts
Equipment typeGear hobbing machine
ModelYKX3132M
Qty2
Max machining sizeModule 0.5 - 8, Ø320 mm
AccuracyGB/T 10095 grade 7 - 8
Typical operationSpur and helical gears
Equipment typeWire EDM
ModelDK7740
Qty3
Max machining size400 × 500 × 250 mm
Accuracy±0.01 mm, Ra 1.6
Typical operationDie inserts, sharp corners, hardened parts
Equipment typeMilling machine
ModelX6325
Qty4
Max machining size320 × 800 mm
Accuracy±0.02 mm
Typical operationSecondary features and repair work
Equipment typeCNC lathe with live tooling
ModelCK6432 / Y-axis
Qty2
Max machining sizeØ320 × 600 mm
AccuracyPositioning ±0.004 mm
Typical operationTurned parts with milled features
Equipment typeHydraulic press
ModelYH27-100T
Qty1
Max machining size100 ton
AccuracyParallelism 0.05 mm
Typical operationStraightening and forming
Equipment typeHeat treatment furnace
ModelRJ-75 / vacuum quench
Qty2
Max machining size600 × 900 × 400 mm
AccuracyTemperature uniformity ±5 °C
Typical operationQuenching, tempering, carburizing
Process precision
Achievable tolerance by process
Stable working range held across batches, not best-case single-piece results.
| Process | Tolerance | Surface roughness | Geometric control |
|---|---|---|---|
| CNC turning | Ø IT6 - IT7, ±0.005 mm stable | Ra 0.8 - 1.6 | Roundness 0.005 mm, coaxiality 0.01 mm |
| CNC milling | IT7 - IT8, hole position ±0.015 mm | Ra 1.6 - 3.2 | Flatness 0.02 mm/300 mm, perpendicularity 0.02 mm |
| Cylindrical grinding | Ø IT5 - IT6, ±0.003 mm | Ra 0.2 - 0.4 | Roundness 0.003 mm, straightness 0.03 mm/m |
| Surface grinding | ±0.005 mm | Ra 0.2 - 0.4 | Flatness 0.005 mm/300 mm |
| Gear cutting | GB/T 10095 grade 7 - 8 | Ra 1.6 on tooth flank | Pitch error 0.02 mm, profile error 0.015 mm |
| Wire EDM | ±0.01 mm | Ra 1.6 - 3.2 | Verticality 0.01 mm/50 mm |
ProcessCNC turning
ToleranceØ IT6 - IT7, ±0.005 mm stable
Surface roughnessRa 0.8 - 1.6
Geometric controlRoundness 0.005 mm, coaxiality 0.01 mm
ProcessCNC milling
ToleranceIT7 - IT8, hole position ±0.015 mm
Surface roughnessRa 1.6 - 3.2
Geometric controlFlatness 0.02 mm/300 mm, perpendicularity 0.02 mm
ProcessCylindrical grinding
ToleranceØ IT5 - IT6, ±0.003 mm
Surface roughnessRa 0.2 - 0.4
Geometric controlRoundness 0.003 mm, straightness 0.03 mm/m
ProcessSurface grinding
Tolerance±0.005 mm
Surface roughnessRa 0.2 - 0.4
Geometric controlFlatness 0.005 mm/300 mm
ProcessGear cutting
ToleranceGB/T 10095 grade 7 - 8
Surface roughnessRa 1.6 on tooth flank
Geometric controlPitch error 0.02 mm, profile error 0.015 mm
ProcessWire EDM
Tolerance±0.01 mm
Surface roughnessRa 1.6 - 3.2
Geometric controlVerticality 0.01 mm/50 mm
Materials
Materials machined regularly
Bar, plate and cast stock are sourced from qualified suppliers with certificates traceable to the batch number.
Alloy steel
40Cr20CrMnTiGCr1542CrMo38CrMoAl
Transmission shafts, gears and bearing parts requiring case hardening.
Tool and die steel
Cr12MoVSKD11DC53P20H13
Die inserts and blank holders, vacuum quench to HRC 58-62.
Stainless steel
SUS304SUS316LSUS303SUS42017-4PH
Medical, food and wet environment parts, passivation available.
Aluminum alloy
6061707550522024
Lightweight brackets and plates, anodizing in natural or black.
Copper alloy
ZCuSn10P1ZCuAl10Fe3H62C93200T2
Bushings, worm wheels and conductive fittings.
Engineering plastic
POMNylon PA66PEEKPTFEPC
Guide blocks, rollers and insulating parts, low speed turning and milling.
Surface treatment
Surface treatment and heat treatment options
Applied in house or through qualified partners, with coating thickness recorded on the inspection report.
| Process | Applicable materials | Effect and typical thickness |
|---|---|---|
| Hard chrome plating | Carbon steel, alloy steel, stainless steel | Thickness 5-30 μm, HRC 65+, wear and corrosion resistance for shafts |
| Zinc plating | Carbon steel | Thickness 5-12 μm, blue or yellow passivation, general rust protection |
| Nickel plating | Carbon steel, copper alloy, stainless steel | Thickness 3-15 μm, uniform coverage on threads and small holes |
| Anodizing | 6061, 7075 aluminum | Thickness 10-25 μm, natural, black or custom color, insulating surface |
| Blackening | Carbon steel, alloy steel | Thickness 1-2 μm, matte black, used with oil for short term protection |
| Nitriding | 38CrMoAl, 40Cr, Cr12MoV | Case depth 0.2-0.5 mm, HV 600+, low distortion surface hardening |
| Carburizing and quenching | 20CrMnTi, 20Cr | Case depth 0.8-1.5 mm, surface HRC 58-62, core HRC 30-45 |
| Passivation | SUS304, SUS316L | Removes free iron, improves corrosion resistance for medical parts |
| Bead blasting | Aluminum, stainless steel | Uniform matte texture, prepares surface for coating |
ProcessHard chrome plating
Applicable materialsCarbon steel, alloy steel, stainless steel
Effect and typical thicknessThickness 5-30 μm, HRC 65+, wear and corrosion resistance for shafts
ProcessZinc plating
Applicable materialsCarbon steel
Effect and typical thicknessThickness 5-12 μm, blue or yellow passivation, general rust protection
ProcessNickel plating
Applicable materialsCarbon steel, copper alloy, stainless steel
Effect and typical thicknessThickness 3-15 μm, uniform coverage on threads and small holes
ProcessAnodizing
Applicable materials6061, 7075 aluminum
Effect and typical thicknessThickness 10-25 μm, natural, black or custom color, insulating surface
ProcessBlackening
Applicable materialsCarbon steel, alloy steel
Effect and typical thicknessThickness 1-2 μm, matte black, used with oil for short term protection
ProcessNitriding
Applicable materials38CrMoAl, 40Cr, Cr12MoV
Effect and typical thicknessCase depth 0.2-0.5 mm, HV 600+, low distortion surface hardening
ProcessCarburizing and quenching
Applicable materials20CrMnTi, 20Cr
Effect and typical thicknessCase depth 0.8-1.5 mm, surface HRC 58-62, core HRC 30-45
ProcessPassivation
Applicable materialsSUS304, SUS316L
Effect and typical thicknessRemoves free iron, improves corrosion resistance for medical parts
ProcessBead blasting
Applicable materialsAluminum, stainless steel
Effect and typical thicknessUniform matte texture, prepares surface for coating
Inspection
Measuring instruments and inspection standards
Instruments are calibrated by a third party once a year. Calibration certificates are available on request.
| Instrument | Model | Range | Inspection items |
|---|---|---|---|
| Coordinate measuring machine | CMM 500 × 600 × 400 | 500 × 600 × 400 mm | Hole position, profile, flatness, perpendicularity |
| Roughness tester | TR200 | Ra 0.02 - 16 μm | Surface roughness on journals and die faces |
| Rockwell hardness tester | HR-150A | HRC 20 - 70 | Hardness after quenching and carburizing |
| Profile projector | JT12A | Ø200 mm screen | Thread profile, blade pitch, radius |
| Micrometer and bore gauge set | 0-25 / 25-50 / 50-75 mm | 0.001 mm resolution | Diameter, wall thickness, groove depth |
| Film thickness gauge | TT260 | 0 - 1250 μm | Chrome, zinc, nickel and anodizing thickness |
InstrumentCoordinate measuring machine
ModelCMM 500 × 600 × 400
Range500 × 600 × 400 mm
Inspection itemsHole position, profile, flatness, perpendicularity
InstrumentRoughness tester
ModelTR200
RangeRa 0.02 - 16 μm
Inspection itemsSurface roughness on journals and die faces
InstrumentRockwell hardness tester
ModelHR-150A
RangeHRC 20 - 70
Inspection itemsHardness after quenching and carburizing
InstrumentProfile projector
ModelJT12A
RangeØ200 mm screen
Inspection itemsThread profile, blade pitch, radius
InstrumentMicrometer and bore gauge set
Model0-25 / 25-50 / 50-75 mm
Range0.001 mm resolution
Inspection itemsDiameter, wall thickness, groove depth
InstrumentFilm thickness gauge
ModelTT260
Range0 - 1250 μm
Inspection itemsChrome, zinc, nickel and anodizing thickness
- Dimensional inspection follows GB/T 1804-m for unspecified tolerances unless the drawing states otherwise.
- First article inspection report is provided with dimensional results, material certificate and heat treatment record.
- Batch orders are sampled at 10 percent, with full inspection available on request.
- Material certificates are traceable to the incoming bar or plate batch number.
- Each shipment includes a packing list and an outgoing inspection record.
Need a feasibility check?
Upload your drawing and engineers will confirm whether the tolerance, material and surface treatment combination is workable on the listed equipment.
Capacity and lead time
Output capacity and delivery windows
Lead times are counted from drawing approval and material availability.
Sample lead time
4 - 10working days
Small batch lead time
8 - 15working days
Volume lead time
15 - 25working days
Monthly output
120,000pieces
On-time delivery rate
96.5percent, 2025 record
Incoming inspection pass rate
99.2percent, 2025 record