ROYAL CNC I.D. WORKHOLDING
For Turning Applications
I.D. Workholding Advantages:
- Allows for full access to the entire length of the workpiece so all external diameters can be turned in a single operation, guaranteeing perfect concentricity.
- On sub-spindle machines, I.D. gripping on the second spindle eliminates the risk of surface damage that can be caused by second-op O.D. gripping of a previously-turned diameter.
- For many parts, the engagement-length of an I.D. bore can be greater than what is available for O.D. gripping, resulting in superior rigidity and torque transmission.
- I.D. systems tend to be more streamlined than O.D. systems, enabling better part access – especially important for use on machines with live tooling.
Bolt & Go™
Royal’s exclusive Bolt & Go™ mounting feature ensures maximum accuracy and rigidity with no adjusting required. Other systems require the mandrel to be trammed in – a hassle that wastes valuable machining time.
Oversized Flange
Borrowing from the winning design of our CNC Collet Chucks, all bodies feature an oversized flange to protect the machine tool spindle bearings from coolant penetration.
Z-Axis Repeatability
Pullback action draws the workpiece securely against a ground locating plate for maximum “dual-contact” rigidity and consistent z-axis repeatability.
Easy Installation
Royal CNC I.D. Workholding Systems include all mounting hardware, wrenches, and a custom-machined drawtube connector to ensure hassle-free installation.
Heavy-Duty Construction
Royal consistently builds products that outlast the competition, especially in the most demanding environments. Bodies, mandrels, and expanding rods are all hardened to Rc 61-63 for maximum durability.
Same-Day Shipping
Royal maintains a huge inventory of standard bodies, mandrels, and sleeves to help us achieve our goal of same-day shipping on all orders.
Custom Systems
If our standard line doesn’t meet your needs, give us a call to discuss your special requirements. Capabilities include:
- Larger sizes – up to 25″ diameter
- Extended-length systems
- Multi-step systems for locating on multiple bore diameters
- Automation enhancements such as ejector rings, part confirmation, etc.
Ultra-Precision Accuracy
System runout guaranteed to be 0.0005″ TIR or better.
Modular Design
Mandrel models A-E all have a common mounting interface with the body so the system can grow with your needs.
Wide Gripping Range
A broad 0.032″ expansion range (0.020″ for model A) enables many bore sizes to be covered with a single expanding sleeve.
Parallel-Grip
Royal’s double-angle design provides parallel sleeve expansion, ensuring full-length part contact and positive release when the part is unclamped.
Outstanding Tool Clearance
Royal CNC I.D. Workholding Systems have been optimized for superior tool clearance over other workholding systems.
Completely Sealed
All expanding sleeve slots are sealed to prevent contaminants from accumulating on the mandrel surface – ensuring years of trouble-free service. An internal O-ring on the drawtube connector offers additional protection.
How to Order:
- Choose the appropriate body assembly based upon your application.
- Choose the appropriate mandrel (models A-E) based upon the diameter you need to All mandrels and bodies share a common mounting interface for full interchangeability.
- If required, choose the appropriate part locator to provide a ground banking surface for the workpiece.
- Choose the appropriate expanding sleeve based upon the mandrel and diameter you need to grip.
Step 1 – Choose Body Assembly
CNC BODY – For CNC Lathes
- This body provides a precision interface for mounting the system to a CNC lathe spindle.
- CNC body assembly incudes the hardened steel body, a custom-machined drawtube connector for hassle-free installation, and all mounting hardware.
- Order mandrels, locators, and sleeves separately.
Dimensions
Note - dimension shown without optional part locator
| SPINDLE MOUNT | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|
| A2-5 | 3.75 | 4.34 | See Mandrel Chart | 6.45 | 5.00 | ||
| A2-6 | 4.00 | 4.59 | 7.45 | 6.25 | |||
| 140mm | 3.90 | 4.49 | 7.45 | 6.25 | |||
| A2-8 | 5.00 | 5.59 | 9.45 | 8.00 | |||
Step 2 - Choose Mandrel
- Choose appropriate mandrel model according to gripping range.
- All Royal mandrels have a common precision ground interface for complete compatibility with all Royal I.D. body assemblies.
- Order body assembly, locators, and sleeves separately.
Royal Mandrels
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Mandrel Model | Gripping Range | C | D | E | Max Axial Force (lbs) | Max Clamping Force (lbs) | PART NUMBER | PRICE | |
|---|---|---|---|---|---|---|---|---|---|
A | 0.479–0.640 | 1.57 | 0.57 | 0.87 | 1570 | 2670 | $1,620.00 | ||
B | 0.620 –0.901 | 1.81 | 0.59 | 1.06 | 2245 | 3820 | $1,620.00 | ||
C | 0.870 –1.151 | 2.05 | 0.61 | 1.26 | 2695 | 4580 | $1,620.00 | ||
D | 1.120 –1.651 | 2.32 | 0.60 | 1.50 | 4045 | 6875 | $1,620.00 | ||
E | 1.620 –3.276 | 2.52 | 0.58 | 1.69 | 5170 | 8785 | $1,620.00 |
Step 3 - Choose Part Locator
- Optional part locator bolts to the front of the mandrel and provides a precision banking surface for the workpiece to locate against.
- Order body assembly, mandrels, and sleeves separately.
Step 4 - Choose Expanding Sleeve
- Order expanding sleeves according to mandrel models A thru E.
- All expanding sleeves are fully sealed against coolant and chip penetration.
- Parallel grip ensures full-length part contact for optimum accuracy and grip force.
- All sleeves collapse 0.005" below nominal ground size to ensure easy part loading and unloading.
- Order body assembly, mandrels, and locators separately
Royal Expanding Sleeves - Model A
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Nominal Sleeve Diameter | Gripping Range | Part Number | PRICE | |
|---|---|---|---|---|
31⁄64″ | 0.479 - 0.499 | 47120 * Not sealed due to limited wall thickness. | $457.00 | |
1⁄2″ | 0.495 - 0.515 | 47121 * Not sealed due to limited wall thickness. | $457.00 | |
33⁄64″ | 0.511 - 0.531 | $457.00 | ||
17⁄32″ | 0.526 - 0.546 | $457.00 | ||
35⁄64″ | 0.542 - 0.562 | $457.00 | ||
9⁄16″ | 0.558 - 0.578 | $457.00 | ||
37⁄64″ | 0.573 - 0.593 | $457.00 | ||
19⁄32″ | 0.589 - 0.609 | $457.00 | ||
39⁄64″ | 0.604 - 0.624 | $457.00 | ||
5⁄8″ | 0.620 - 0.640 | $457.00 | ||
41⁄64″ | 0.636 - 0.656 | $457.00 |
Royal Expanding Sleeves - Model B
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Nominal Sleeve Diameter | Gripping Range | Part Number | PRICE | |
|---|---|---|---|---|
5⁄8″ | 0.620 - 0.651 | 47130 * Not sealed due to limited wall thickness. | $498.00 | |
21⁄32″ | 0.651 - 0.682 | $498.00 | ||
11⁄16″ | 0.683 - 0.714 | $498.00 | ||
23⁄32″ | 0.714 - 0.745 | $498.00 | ||
3⁄4″ | 0.745 - 0.776 | $498.00 | ||
25⁄32″ | 0.776 - 0.807 | $498.00 | ||
13⁄16″ | 0.808 - 0.839 | $498.00 | ||
27⁄32″ | 0.830 - 0.870 | $498.00 | ||
7⁄8″ | 0.870 - 0.901 | $498.00 |
Royal Expanding Sleeves - Model C
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Nominal Sleeve Diameter | Gripping Range | Part Number | PRICE | |
|---|---|---|---|---|
7⁄8″ | 0.870 - 0.901 | $498.00 | ||
29⁄32″ | 0.901 - 0.932 | $498.00 | ||
15⁄16″ | 0.933 - 0.964 | $498.00 | ||
31⁄32″ | 0.964 - 0.995 | $498.00 | ||
1″ | 0.995 - 1.026 | $498.00 | ||
1 1⁄32″ | 1.026 - 1.057 | $498.00 | ||
1 1⁄16″ | 1.058 - 1.089 | $498.00 | ||
1 3⁄32″ | 1.089 - 1.120 | $498.00 | ||
1 1⁄8″ | 1.120 - 1.151 | $498.00 |
Royal Expanding Sleeves - Model D
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Nominal Sleeve Diameter | Gripping Range | Part Number | PRICE | |
|---|---|---|---|---|
1 1⁄8″ | 1.120 - 1.151 | $543.00 | ||
1 5⁄32″ | 1.151 - 1.182 | $543.00 | ||
1 3⁄16″ | 1.183 - 1.214 | $543.00 | ||
1 7⁄32″ | 1.214 - 1.245 | $543.00 | ||
1 1⁄4″ | 1.145 - 1.276 | $543.00 | ||
1 9⁄32″ | 1.276 - 1.317 | $543.00 | ||
1 5⁄16″ | 1.308 - 1.339 | $543.00 | ||
1 11⁄32″ | 1.339 - 1.370 | $543.00 | ||
1 3⁄8″ | 1.370 - 1.401 | $543.00 | ||
1 13⁄32″ | 1.401 - 1.432 | $543.00 | ||
1 7⁄16″ | 1.433 - 1.464 | $543.00 | ||
1 15⁄32″ | 1.464 - 1.495 | $543.00 | ||
1 1⁄2″ | 1.495 - 1.526 | $543.00 | ||
1 17⁄32″ | 1.526 - 1.557 | $543.00 | ||
1 9⁄16″ | 1.558 - 1.589 | $543.00 | ||
1 19⁄32″ | 1.589 - 1.620 | $543.00 | ||
1 5⁄8″ | 1.620 - 1.651 | $543.00 |
Royal Expanding Sleeves - Model E
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Nominal Sleeve Diameter | Gripping Range | Part Number | PRICE | |
|---|---|---|---|---|
1 5⁄8″ | 1.620 - 1.651 | $662.00 | ||
1 21⁄32″ | 1.651 - 1.682 | $662.00 | ||
1 11⁄16″ | 1.683 - 1.714 | $662.00 | ||
1 23⁄32″ | 1.714 - 1.745 | $662.00 | ||
1 3⁄4″ | 1.745 - 1.776 | $662.00 | ||
1 25⁄32″ | 1.776 - 1.807 | $662.00 | ||
1 13⁄16″ | 1.808 - 1.839 | $662.00 | ||
1 27⁄32″ | 1.839 - 1.870 | $662.00 | ||
1 7⁄8″ | 1.870 - 1.901 | $662.00 | ||
1 29⁄32″ | 1.901 - 1.932 | $662.00 | ||
1 15⁄16″ | 1.933 - 1.964 | $662.00 | ||
1 31⁄32″ | 1.964 - 1.995 | $662.00 | ||
2″ | 1.995 - 2.026 | $662.00 | ||
2 1⁄32″ | 2.026 - 2.057 | $662.00 | ||
2 1⁄16″ | 2.058 - 2.089 | $662.00 | ||
2 3⁄32″ | 2.089 - 2.120 | $662.00 | ||
2 1⁄8″ | 2.120 - 2.151 | $662.00 | ||
2 5⁄32″ | 2.151 - 2.182 | $662.00 | ||
2 3⁄16″ | 2.183 - 2.214 | $662.00 | ||
2 7⁄32″ | 2.214 - 2.245 | $662.00 | ||
2 1⁄4″ | 2.245 - 2.276 | $662.00 | ||
2 9⁄32″ | 2.276 - 2.307 | $662.00 | ||
2 5⁄16″ | 2.308 - 2.339 | $662.00 | ||
2 11⁄32″ | 2.339 - 2.370 | $662.00 | ||
2 3⁄8″ | 2.370 - 2.401 | $662.00 | ||
2 13⁄32″ | 2.401 - 2.432 | $662.00 | ||
2 7⁄16″ | 2.433 - 2.464 | $662.00 | ||
2 15⁄32″ | 2.464 - 2.495 | $662.00 | ||
2 1⁄2″ | 2.495 - 2.526 | $662.00 | ||
2 17⁄32″ | 2.526 - 2.557 | $748.00 | ||
2 9⁄16″ | 2.558 - 2.589 | $748.00 | ||
2 19⁄32″ | 2.589 - 2.620 | $748.00 | ||
2 5⁄8″ | 2.620 - 2.651 | $748.00 | ||
2 21⁄32″ | 2.651 - 2.682 | $748.00 | ||
2 11⁄16″ | 2.683 - 2.714 | $748.00 | ||
2 23⁄32″ | 2.714 - 2.745 | $748.00 | ||
2 3⁄4″ | 2.745 - 2.776 | $748.00 | ||
2 25⁄32″ | 2.776 - 2.807 | $748.00 | ||
2 13⁄16″ | 2.808 - 2.839 | $748.00 | ||
2 27⁄32″ | 2.839 - 2.870 | $748.00 | ||
2 7⁄8″ | 2.870 - 2.901 | $748.00 | ||
2 29⁄32″ | 2.901 - 2.932 | $748.00 | ||
2 15⁄16″ | 2.933 - 2.964 | $748.00 | ||
2 31⁄32″ | 2.964 - 2.995 | $748.00 | ||
3″ | 2.995 - 3.026 | $748.00 | ||
3 1⁄32″ | 3.026 - 3.057 | $748.00 | ||
3 1⁄16″ | 3.058 - 3.089 | $748.00 | ||
3 3⁄32″ | 3.089 - 3.120 | $748.00 | ||
3 1⁄8″ | 3.120 - 3.151 | $748.00 | ||
3 5⁄32″ | 3.151 - 3.182 | $748.00 | ||
3 7⁄32″ | 3.214 - 3.245 | $748.00 | ||
3 3⁄16″ | 3.183 - 3.214 | $748.00 | ||
3 1⁄4″ | 3.245 - 3.276 | $748.00 |
*Not sealed due to limited wall thickness.
Note – sleeves larger than 2-1/2" dia. are 0.28" longer than dimension E and terminate flush with the face of the expanding rod.