Houston Precision • Tooling Guide
Cold Root Rolling Toolholders
Choosing the right setup for box and pin connections.
Cold root rolling applications require the right combination of tooling configuration, wheel style, shank size, and machine clearance. Depending on whether the application involves an internal thread (box connection) or an external thread (pin connection), manufacturers have several toolholder configurations available to match the machining environment.
The CJWinter cold root rolling product offerings highlighted here include bar-style tools for both box and pin connections, along with turret-mount and tool-post-mount options for external pin applications. Together, these configurations provide manufacturers with multiple ways to integrate cold root rolling into existing equipment and production processes.
01 / Internal Thread
Bar-Style Tools for Box Connections
For internal thread or box connection applications, the product guide identifies the 11069/11070-xxx-SA and GP Series as bar-style tooling options.
The SA Series uses an EPL, or “Error Proof Loading,” internal tool. This configuration uses a 1.0-inch OD by .375-inch-wide EPL wheel. The standard configuration features a 2.5-inch diameter by 4-inch-long shank, with additional shank configurations available.
Available Shank Configurations
- Standard: 2.5-inch diameter × 4-inch-long
- Alternative: 65 mm diameter × 4-inch-long
- Alternative: 2.0-inch diameter × 5.25-inch-long
The corresponding GP Series is designed around a General Purpose-style wheel, also measuring 1.0-inch OD by .375-inch wide, and is available with the same shank size options as the SA tooling.
This range of configurations gives machine shops options when integrating internal cold root rolling tooling into different machines and setups.
02 / External Thread
Bar-Style Tools for Pin Connections
For external thread or pin connection applications, the 11071-xxx-SA and GP Series provides a similar bar-style approach.
The SA configuration is an EPL external tool using a 2.0-inch OD by .375-inch-wide EPL wheel. Its standard shank is again 2.5 inches in diameter by 4 inches long, with 65 mm × 4-inch and 2.0-inch × 5.25-inch shank alternatives available.
The GP version uses a larger-width General Purpose wheel measuring 2.0-inch OD by .500-inch wide while retaining the same available shank sizes as the SA version.
The bar-style configuration can be an effective choice when the machine and workholding arrangement provide adequate room for the tooling and the application is suited to a conventional shank-mounted setup.
03 / Direct Mounting
Turret-Mount Cold Root Rolling Tools
For external pin applications where machine clearance or tooling integration presents additional challenges, the 11072-xxx-SA and GP Series introduces a direct turret/tool-post mounting configuration.
Because the tool mounts directly to the turret or tool post, the design also eliminates the need for a separate toolholder adapter. According to the product guide, its profile more closely resembles other OD turning tools, helping reduce potential interference with the machine’s chuck jaws and back wall.
Another design characteristic is the alignment of the rolling forces directly with the turret.
Square-Shank and Machine Compatibility Options
The 11072-A-xxx-SA Series is available as a square-shank mount.
A 1.25-inch shank is standard, while additional options include sizes from 1.00 inch through 1.50 inches, as well as metric-sized shanks.
These options can make it easier to match the cold root rolling tool to different machine-tool configurations without forcing a shop into a single mounting dimension.
04 / Wheel Selection
SA vs. GP Wheel Configurations
Both product families provide SA and GP configurations, but their rolling wheel specifications differ.
| Tooling / Application | SA / EPL Wheel | GP / General Purpose Wheel |
|---|---|---|
| 11069/11070 Internal box, bar-style |
1.0-inch OD × .375-inch wide | 1.0-inch OD × .375-inch wide |
| 11071 External pin, bar-style |
2.0-inch OD × .375-inch wide | 2.0-inch OD × .500-inch wide |
| 11072 External pin, turret-mount |
2.0-inch OD × .375-inch wide | 2.0-inch OD × .500-inch wide |
For external turret-mounted tooling, the SA model uses a 2.0-inch OD × .375-inch-wide EPL-style wheel, while the GP model uses a 2.0-inch OD × .500-inch-wide General Purpose-style wheel.
The GP turret-mount version retains the same basic clearance characteristics and mounting features described for the corresponding SA Series.
For shops evaluating tooling, this means the decision is not simply between bar-style and turret-mounted tooling. The specific rolling-wheel style must also be matched to the intended setup and application.
05 / Operator Visibility
Tool-Post Mounting and Gauge Visibility
The 11072 tooling family also includes 11072-xxx-SA1 and GP1 Series tool-post-mounted configurations.
These retain the primary characteristics of the turret-mounted versions while incorporating an alternate gauge orientation for viewing from the back of the machine.
That seemingly small design detail can be important when machine configuration or operator position makes conventional gauge viewing difficult.
Selecting the Right Cold Root Rolling Toolholder
Choosing among these configurations generally starts with a few practical questions:
- Is the application an internal box connection or external pin connection?
- Does the machine favor a bar-style, turret-mount, or tool-post-mount configuration?
- How much turret and chuck clearance is available?
- What shank size best matches the machine?
- Is an EPL-style or General Purpose wheel configuration appropriate for the application?
- Where will the operator need to view the tool’s gauge?
Answering these questions before selecting the tooling can help narrow the available configurations and simplify integration into the machine.
Matching Cold Root Rolling Tooling to Your Equipment
Cold root rolling tooling is not a one-size-fits-all system. Internal box applications, external pin applications, machine clearance, turret configuration, shank dimensions, and wheel style can all influence the correct tooling choice.
The CJWinter product families covered in these guides provide options ranging from 11069/11070 internal bar-style tooling and 11071 external bar-style tooling to the more compact 11072 direct turret and tool-post configurations.
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Find the Right Setup for Your Application
Houston Precision can help evaluate the application, machine configuration, and tooling requirements to identify the cold root rolling setup that best fits your manufacturing process.