Product Overview
★ What kind of product is this?
Tailored for mechanical sealing and end protection, our CNC turned end caps adopt premium 1045 medium carbon steel and professional black oxide finishing. Fabricated on high-precision CNC lathes, each component boasts stable outer diameter, perfect bore concentricity and consistent dimensional accuracy across all production runs. The blackened surface effectively boosts rust resistance and eliminates excessive light reflection, making these end caps ideal for automotive transmission systems, hydraulic cylinder end enclosures and various mechanical equipment housings. We fully support custom sizing and OEM/ODM manufacturing to match your unique design drawings and application needs.
★ Why choose 1045 steel?
For engineering projects that require solid mechanical performance and controlled costs, 1045 carbon steel is always a practical and reliable option. With a carbon content of roughly 0.45%, this medium-carbon steel outperforms common low-carbon 1018 steel in tensile strength and abrasion resistance. Meanwhile, it features better machinability and lower processing costs than high-grade alloy steels like 4140. If your parts need enhanced surface hardness for specific working conditions, 1045 steel can also undergo customized heat treatment to meet upgraded performance standards. It strikes a perfect balance between sturdy structural capability and affordable production expenditure for high-volume, cost-sensitive orders.
★ Why do Black Oxide surface treatments?
Many industrial clients choose black oxide finishing for steel precision parts for one core advantage - it delivers reliable anti-rust performance and a neat matte appearance without altering part dimensions. This chemical treatment forms an ultra-thin 1 to 2 micron magnetite protective layer on the steel surface. Unlike electroplating processes that may cause dimensional deviation, this thin coating fully retains all critical tight tolerances of machined parts. Besides basic corrosion resistance for daily use, it also reduces surface glare and offers mild wear protection. This finish works perfectly for indoor mechanical operation and short-duration outdoor scenarios. For equipment exposed to long-term humidity or salt fog environments, we suggest matching with anti-rust oil or switching to zinc plating for stronger protection.
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Key Features
● Stable Machining Performance - 1045 steel delivers clean, consistent cutting results, supporting stable efficiency and uniform quality for small-batch prototypes and large-volume repetitive production.
● Robust Mechanical Strength - Outperforms 1018 low-carbon steel in tensile and yield strength, resisting deformation under frequent mechanical load and cyclic operation.
● Precision Dimensional Control - Maintains ±0.02–0.05 mm standard tolerance, with up to ±0.01 mm ultra-tight precision for critical features. Black oxide finishing causes no dimensional deviation.
● Reliable Anti-Corrosion Performance - The black oxide coating effectively prevents mild oxidation and daily wear, fitting most indoor and short-term outdoor working scenarios.
● High Cost-Effectiveness - Provides dependable mechanical performance at a lower production cost than stainless steel and electroplated parts, perfect for large-scale industrial procurement.
Technical Specifications
|
Item |
Specification |
|---|---|
|
Material |
AISI 1045 Carbon Steel |
|
Processing Technology |
Precision CNC Turning |
|
Surface Finish |
Black Oxide (Blackening) |
|
Surface Roughness |
Ra 1.6 |
|
Finished Hardness |
170–210 HB |
|
Diameter Range |
5 mm – 1000 mm |
|
Length Range |
5 mm – 200 mm |
|
Threading Service |
Internal / External, Standard & Custom Pitch |
|
MOQ |
1 Piece (Prototype & Sample Supported) |
|
Lead Time |
7 Days for Samples / 15–30 Days for Batch Production |
Material properties of 1045 steel
| Property | Value |
|---|---|
| Carbon Content | 0.45% |
| Density | 7.85 g/cm³ |
| Tensile Strength | Approx. 570 MPa |
| Yield Strength | Approx. 310 MPa |
| Hardness | 170 – 210 HB |
| Elongation | Approx. 16% |
Compared to 1018 steel, 1045's higher carbon content gives it greater tensile strength and wear resistance - better suited for shafts, caps, and load-bearing components that need to hold their shape under repeated mechanical stress.
Quality inspection
★ CMM dimensional inspection for complex precision sizes
★ Thread gauge verification for all threaded structures
★ Professional surface roughness testing (Ra value)
★ Micrometer and caliper spot checks for key dimensions
★ Material test reports fully available upon customer request
about Us
Xi'an Hi-Precision Machinery Co., Ltd. is a leading Chinese manufacturer of CNC steel parts. Our advanced CNC lathes and machining centers are capable of machining a wide range of steel alloys, including 1045 steel, as well as aluminum, copper, titanium, and plastics. We offer a variety of CNC turning, milling, threading, grinding, drilling, and wire EDM processes to meet the most demanding precision manufacturing needs.
Our engineers and operators have extensive experience in CNC programming and operation, and are familiar with various CAD/CAM software, as well as the characteristics and processing techniques of various steel materials.

01
High Quality
We have passed ISO9001 and other relevant quality certifications.
02
Advanced Equipment
We have high-precision, highly automated CNC machine tools, such as multi-axis CNC machines.
03
Professional Team
Our operators have extensive experience in CNC programming and operation.
04
Transparent quotes
We can provide detailed quotations, including processing costs, raw material costs, transportation costs, etc.
factory floor
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lathe workshop
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We can develop optimal machining processes based on part material (e.g., 1045 steel, 304 stainless steel) and structure (e.g., deep holes, thin walls, complex cavities). We also have the capability to process thin-walled steel parts and can mass-produce special-shaped parts (e.g., shafts with irregular grooves). In addition to 1045 steel, we can also process stainless steels like 304 and 316, as well as alloy steels, mold steels, and bearing steels.
We adapt our processes to specific customer requirements, such as special tolerances or precision requirements before surface treatment. If you require CNC turned 1045 steel cap blacken services, please contact us.
Transaction Process
Our Service Processes
WhatsApp:+8617316642819
Pre-sales
Consultancy
1
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Confirmation of order
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Production
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Quality Control
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Packing & Shipping
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After-sale Services
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FAQ
FAQ
Q: What tolerance can you achieve on 1045 steel end caps?
A: A: We keep standard tolerance within ±0.02–0.05 mm for regular features. For critical functional dimensions, we can achieve precision up to ±0.01 mm. You only need to mark key tolerance requirements on your drawing for targeted production.
Q: Is black oxide finish suitable for outdoor and humid working environments?
A: A: Black oxide provides basic anti-rust protection, ideal for indoor equipment and short-term outdoor use. For long-term humid or salt fog exposure, we suggest matching with anti-rust oil or choosing zinc plating for stronger durability.
Q: Can 1045 steel end caps be heat treated for higher hardness?
A: A: Yes. 1045 steel adapts well to flame and induction hardening. We can perform targeted heat treatment on wear-prone surfaces according to your actual usage and hardness standards.
Q: Do you support sample trial production before bulk orders?
A: A: Absolutely. We provide sample evaluation services. You can send us STEP, DWG, PDF drawings or physical samples, and we will complete customized sample processing for your confirmation before mass production.
Q: What are your MOQ and delivery cycle?
A: A: We support 1-piece sample order. Sample production takes about 7 working days, and bulk orders take 15–30 days. The specific delivery time can be adjusted according to order quantity and part complexity.
Q: Can you customize non-standard sizes and special threads?
A: A: Yes. All specifications on the page are standard configurations. We fully support personalized customization of outer diameter, length, internal and external threads, and special structural features based on customer drawings.
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