CUSTOM TURNED COMPONENTS
CNC Knurling
Services
Custom knurled knobs, sleeves and turned parts. Share your drawing to review the grip pattern, material and finished dimensions.
Your files stay confidential. Optional NDA available ↗
A part built around its function.Part reference from our image library
The right knurl starts
with how the part is used.
CNC knurling creates a regular surface pattern on a component, usually on a lathe. For purchasing and engineering teams, the key decisions are the pattern, pitch, textured area and final size. ProleanTech reviews these requirements alongside the complete turned part.
Straight knurling
Parallel ridges along the part axis.
For cylindrical grip zones and specified assembly features. Define pitch and the direction of the ridges.
Diamond knurling
Intersecting diagonal grooves create a diamond texture.
For manually adjusted knobs, handles and collars. Agree the pitch and acceptable sharpness for the intended contact.
Diagonal knurling
A single left- or right-hand inclined pattern.
For drawings that require a directional texture. State the hand and angle rather than relying on a photograph.
State the pitch system, profile and textured length. If a standard is required, include its designation and applicable edition. Tooling and pattern availability are confirmed during drawing review.
PROCESS & PART GEOMETRY
Forming and cutting
need different allowances.
A knurl is a surface geometry; it does not by itself specify how the feature is made. The process choice affects blank size, part loading and the way the feature is inspected.
Form knurling
Wheels displace metal under pressure to produce the pattern. Material moves into the raised peaks, so the outside diameter increases. The blank diameter must allow for this growth.
Material ductility, wall thickness and workholding influence suitability. Thin sleeves and slender parts need particular attention to deformation and support.
Cut knurling
A cutting action removes material to produce the texture. Lower forming loads can make this route worth considering for pressure-sensitive geometries.
Tool access, pattern, material and available tooling still govern feasibility. Send thin-wall or special-profile drawings for a project-specific process review.
Process descriptions explain the engineering choices. The route for your part is confirmed in the quotation.
Technical reference: Hommel+Keller: form knurling ↗ · cut knurling ↗. Toolmaker guidance describes the processes; it does not certify ProleanTech tooling or capacity.
Knurled parts,
considered as complete components.
Threads, bores, shoulders and gripping surfaces need to work together. Request custom knurled parts from prototypes to production quantities, with the machining and finish reviewed against one drawing revision.
Knobs & caps
For manual adjustment and access. Define the grip length, adjacent threads, edge breaks and acceptable surface appearance.
Rings & collars
For adjustment and retaining components. Review wall thickness, bore geometry and the relationship between the knurled surface and mating features.
Threaded sleeves & inserts
For components that combine a patterned exterior with internal threads. Retention in a mating material requires an application-specific joint design and validation.
These photographs show part features, rather than documented customer performance or certified material grades.
Match the material.
Plan the finish around the texture.
Request knurled components in aluminum, brass, stainless steel and mild steel. Quote the exact grade and condition: a material family alone cannot determine the process or final dimensions.
Aluminum
Specify alloy and temper. Review wall support, finished outside diameter and any anodizing requirement together.
Brass
Specify the alloy and intended function. Include thread, bore and appearance requirements for knobs, sleeves and fittings.
Stainless steel
State grade and condition. Forming response and machining behavior vary; hardness and work hardening need review.
Mild steel
Identify grade, stock condition and corrosion protection. Include any heat treatment and final dimensional requirements.
Preserve the grip profile
Specify deburring and edge requirements without calling for indiscriminate polishing of the knurled zone. Polishing can soften the peaks and change the feel of the texture.
Define the final condition
Anodizing on aluminum or a specified coating can affect dimensions and appearance. Mark masked areas and state whether diameter acceptance applies after finishing.
DRAWING & ACCEPTANCE
Specify the texture.
Control what actually fits.
A knurl callout needs more than a roughness value. Define the geometry and acceptance criteria that govern handling or assembly, including the condition in which the part will be measured.
Include these on the drawing
- Pattern: straight, diamond or diagonal; profile, pitch system, hand and angle where relevant.
- Location: textured length, start and end positions, datum and nearby shoulders.
- Size: finished outside diameter over the peaks, tolerance and bore or thread requirements.
- Final condition: material grade, condition, heat treatment, finish, masking and edge acceptance.
Agree what “acceptable” looks like.
For visible or hand-contact parts, provide a reference sample or clearly defined visual criteria. State requirements for pattern continuity, double tracking, incomplete teeth, burrs and sharp edges.
For a press-fit or molded-in feature, supply the mating material, interface dimensions and required retention tests. A knurl alone does not establish pull-out strength or torque resistance.
Make inspection part of the quote.
Identify critical dimensions and the measurement method for the textured surface. Agree sampling, reports, material documents and any first-article approval before placing the order.
We review requested tolerances against geometry, material, process and measurement access. No single tolerance or surface roughness value describes every knurled part.
A clear specification.
A traceable agreement.
Review our company, quality certificate and documentation guidance alongside your part requirements. Specify which records need to accompany your order.
From your drawing
to a defined production scope.
Material and blank size, pattern tooling, knurl length, access, quantity, secondary machining, finishing and inspection. Send prototype and repeat-order quantities together for a useful comparison.
Can I order a complete custom knurled knob or turned part?
Yes. Send the complete component drawing, including the knurled zone, threads, bores and other features. ProleanTech reviews the machining, material and finish together, with the final production scope confirmed in the quote.
Which knurling patterns can I request?
Request straight, diamond or directional knurling with the pitch and textured area defined. Include the profile or standard designation where required. Exact pattern, tooling availability and feasibility are confirmed after drawing review.
Does knurling change the outside diameter?
Form knurling displaces metal and increases the outside diameter. Cut knurling removes material. Specify the required final diameter and finishing condition so the blank and process can be selected appropriately.
Can you knurl aluminum or thin-wall sleeves?
Aluminum is among the materials covered by this service. Include alloy, temper, wall thickness and bore requirements. Thin-wall sleeves need a review of forming loads, support and possible cutting routes before feasibility is confirmed.
What tolerances and inspection reports are available?
Send the critical dimensions, datums and final condition for review. Agree the diameter measurement method, acceptance criteria and any dimensional or material records with the quotation. Tolerances and reporting are specific to the reviewed order.
Can a knurled part be anodized, plated or polished?
Finishing must be matched to the material and function. Specify the coating and masked areas, and whether size is controlled after finishing. Polishing the knurl can soften the texture, so define which surfaces may be polished.
Do you have a minimum order or fixed lead time?
Share your prototype, batch and repeat-order quantities together with the requested delivery date. Order feasibility, pricing and timing are quoted for the part after material, tooling, operations and inspection requirements have been reviewed.
What files are needed for a CNC knurling quote?
A STEP model and dimensioned PDF are a useful starting point. Include material grade and condition, quantity, revision, pattern and pitch, finished diameter, finish and inspection requirements. Files are handled confidentially; an NDA is available if required.
START WITH YOUR DRAWING
Let’s review your
next knurled part.
Send your design, quantity and critical requirements. Get a project-specific review of the pattern, material, final dimensions and production scope.
Your files stay confidential · Optional NDA available ↗