ROBOTICS · AUTOMATION · CUSTOM CNC PARTS

Robot Joint Housings, Arm Links and End-of-Arm Tooling Parts

Custom CNC machining for robotics in Shenzhen, China, from 1 piece to repeat batches. Most of the parts are joint housings, arm links and gripper or end-of-arm tooling components, shown below. On joint housings the bearing bores and mounting faces usually need to be cut in one clamping to stay aligned, and the rest of the route is planned around that.

Request a Quote Explore Machined Parts

Robot housings · Gripper interfaces · Custom mounting components.

ROBOTICS COMPONENT SUPPLY

Common Robotics Components

Typical robot parts, with the features that usually decide the machining route.

Machined aluminum robot arm housing with bearing bores and a perforated shell, on its stock base

CNC-Machined Robot Joint Housings

Aluminum or stainless steel · CNC milling and turning.

Application: Motor interfaces and bearing seats in robot joint assemblies.

Manufacturing focus: Bearing fits, coaxial bores and flange mounting patterns.

Machined aluminum gripper finger with a pocketed jaw and mounting holes

Machined Gripper Fingers & Jaws

Aluminum, stainless steel or engineering plastics · CNC machining.

Application: Custom fingers, jaws and mounting interfaces for robot grippers.

Manufacturing focus: Contact geometry, jaw alignment and clearance through the gripping motion.

Blue anodized aluminum tooling plate with a mounting hole pattern and centre bushing

Custom End-of-Arm Tooling Components

Aluminum or stainless steel · Milling, drilling and finishing.

Application: Robot wrist adapters, tool mounting plates and locating interfaces.

Manufacturing focus: Flange hole patterns, locating features and clearance for tooling services.

Machined aluminum support with two bearing seats and fitted bearings

Motor & Bearing Mounts

Aluminum or stainless steel · CNC milling and turning.

Application: Servo motor and bearing supports in rotating robot assemblies.

Manufacturing focus: Bore alignment, support faces and the relationship between mating fits.

CNC machined aluminum chassis with complex walls and mounting features

Robot Chassis & Structural Parts

Aluminum or stainless steel · CNC milling.

Application: Structural links, chassis parts and load-carrying mounting geometry.

Manufacturing focus: Assembly datums, wall thickness and access to mounting features.

Black anodized aluminum sensor mounting bracket with slots and cradles

Accessory Mounting Plates

Aluminum or engineering plastics · CNC milling.

Application: Camera and sensor mounting interfaces on robot wrists and automation equipment.

Manufacturing focus: Positioning repeatability, adjustment features and sensor clearance.

MATERIALS & MANUFACTURING

Match the part to its role in your assembly.

Machined aluminum frames, links and housings for a robotic assembly

Aluminum Components

Housings, brackets and mounts with milling, drilling and specified finishing.

Turned steel drive shaft with spline, bearing journals and threaded end

Stainless Steel Parts

Shafts, sleeves and mechanical interfaces with turning, milling and dimensional inspection.

Black machined polymer housing with ribs and mounting interfaces

Engineering Plastics

Custom machined polymer parts for guides, mounting interfaces and application-specific components.

Materials & Finishes CNC Machining

ASSEMBLY & INSPECTION

Control the interfaces that determine fit.

On robot parts the tight features are usually few: bearing seats, the bores that have to stay coaxial and the flange hole pattern. Marked on the drawing, those are measured on every part unless a sampling plan is agreed on the order, and the rest is checked to the general tolerance. If the part is anodized, say whether the fits apply after coating.

Development samples, low-volume batches and repeat orders are all made to the drawing revision named on the order.

Quality & Inspection

MORE ROBOT AND AUTOMATION PARTS

Drive train, shafts and cell hardware

Robot partReducer and gearbox housingsHousings that locate a harmonic or planetary reducer. The reducer pilot, bearing seats and output face are machined so they stay concentric with each other and are checked against the datum on the drawing.5-axis machining Robot partPrecision shafts and bushingsOutput shafts, joint pins and bushings, turned and then ground where a bearing or seal runs. Journals, shoulders and keyways are held to the fit called on the drawing.Shaft example Robot partGears, pulleys and racksSpur, helical and bevel gears, timing pulleys and racks cut to drawing, with the bore and keyway machined to suit the shaft they run on.Transmission parts Robot partSensor brackets and fixturesCamera and sensor brackets, cable guides and assembly fixtures for robot cells. Usually quick parts, but locating holes and mounting faces still have to land where the drawing puts them.Fixture example

For joint drives see gears, racks and timing pulleys, and for other sectors the industries we supply.

GET YOUR ROBOTICS PARTS QUOTE

Bring your next robotic component to TOVILON.

Send the CAD model and drawing with the quantity. A sketch of how the part sits in the assembly often answers many of our questions before we ask them.

Request a Quote Email Robotics Drawings Download Checklist · PDF

Request an NDA before sending confidential drawings

Related engineering guides

Engineering guide5-Axis CNC Machining for Robotic PartsHow tool access, aluminum selection, functional interfaces and inspection planning shape custom CNC components for robotic joints and automation systems.Read the guide Engineering guideChoosing 6061, 6082 or 7075 Aluminum for Robot Joint Housings and Automation PartsTypical properties of 6061-T651, 6082-T6 and 7075-T651 compared by temper, when 7075 actually fixes a part, how temper, stock form and anodizing change the…Read the guide Engineering guideAnodizing Machined Aluminum Parts: Coating Build-Up, Thread Masking and Fit AllowancesAnodizing shrinks bores and grows shafts. How much Type II and hard anodizing add, worked machining allowances for H7 bores, g6 shafts and M6…Read the guide

Part examples made to drawing: robot hand structural components, a robot joint housing in 7075 and an automation fixture with locating pins.

Robot parts machining FAQ

Which robot parts do you machine?

Joint and gearbox housings, arm links, harmonic reducer flanges, motor and bearing mounts, gripper fingers and jaws, end-of-arm tooling plates, tool-changer plates and sensor mounting plates, machined to your drawing.

Can you machine robot parts in small batches for development?

Yes. Orders start from 1 piece. Development samples, pilot builds and low-volume batches use the same drawing review and inspection, and the approved route is kept under revision control for repeat orders.

How do you keep bearing bores aligned in a robot joint housing?

Coaxial bores, flange faces and mounting patterns are cut in one clamping wherever the geometry allows, using 5-axis machining for angled features. Coaxiality and hole positions are then checked against the drawing datums.

Which materials are used for robot components?

Aluminum such as 6061 and 7075 for housings, links and mounts; stainless steel such as 304 and 316 for shafts, sleeves and mechanical interfaces; and engineering plastics such as POM and PEEK for guides and gripper parts.

Do fitted bores stay in tolerance after anodizing?

Fits are planned around the finish. Bores and mating faces are machined with allowance for the coating or masked during anodizing, and critical fits are checked after finishing.