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Combined needle roller and axial cylindrical roller bearing for screw drives, 40 x 115 x 93 mm, double direction, 117 kN axial dynamic load rating.
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| MFR / Brand | INA |
|---|---|
| MPN | ZARF40115LTVA |
| Model | ZARF 40115 L TV A |
| ID | 40 mm |
| OD | 115 mm |
| Width | 93 mm (overall height H) |
| Condition | New |
|---|---|
| Base Number | ZARF40115 |
| Common Misspellings | ZARF40115LTVA; ZARF40115 LTVA; ZARF 40115LTVA; ZARF40115-LTVA; ZARF40115LTV-A; ZARF40155LTVA |
| Application Types | Machine tool ball screw and lead screw fixed-end support; CNC feed axes; press and injection moulding screw drives; precision positioning stages |
| Total Width | 93 mm (overall height H) |
| Bolt Center To Center Length | 94 mm pitch circle diameter, 12 holes at 30° |
| Bore Shaft Size | 40 mm |
| Locking Method | Screw mounting: 12 x M8 at 30° spacing on a 94 mm pitch circle; AM40 axial locknut at 120 Nm |
| Relubrication | 6 mm lubrication hole, 12.5 mm from the outer ring face |
| Replacement Insert | Specified locknuts: INA AM40 (axial locking), INA ZMA40/75 precision locknut (radial locking) |
| Mpn Variants | ZARF40115LTVA; ZARF40115-L-TV-A; ZARF-40115-L-TV-A; ZARF 40115 L TV A; ZARF40115LTV; ZARF40115-L-TV; ZARF40115L; ZARF40115 |
| Compatible With Replaces | INA ZARF40115-L-TV; ZARF40115-L-TV-A |
| Arrangement Configuration | Double direction, combined axial and radial, screw-mounted through the outer ring, long stepped shaft locating washer |
| Additional Attributes | Fatigue load limit axial (Cua): 27,000 N. Fatigue load limit radial (Cur): 10,400 N. Axial rigidity (caL): 3,800 N/µm. Tilting stiffness (ckL): 1,800 Nm/mrad. Bearing friction torque (MRL): 2.5 Nm. Mass moment of inertia: 15.5 kg.cm2. Outer ring width (C): 22.5 mm. Height outer ring over wave washer (H1): 65.5 mm. Shaft washer rib diameter (D1): 78 mm. Wave washer: width 16 mm; long form width 34 mm, heel width 14 mm, heel diameter 60 mm, outside diameter 78 mm. Max housing shoulder diameter (Da): 79 mm. Min shaft shoulder diameter (da): 58 mm. Housing bore position tolerance (t1): 0.2 mm. Min chamfer: 0.3 mm and 0.6 mm. Lubrication hole diameter: 6 mm, 12.5 mm from face. Screw pattern: 12 x M8 on a 94 mm pitch circle at 30°. |
| Material | Through-hardened chrome bearing steel rings and rollers, PA66 polyamide cage |
| Min Temp | -30 °C |
| Cage Type | Moulded |
| Dynamic Load Rating | 117 kN / 26,303 lbf (axial, Ca); 38 kN / 8,543 lbf (radial, Cr) |
| Static Load Rating | 315 kN / 70,815 lbf (axial, C0a); 74 kN / 16,636 lbf (radial, C0r) |
| Series | ZARF |
| Rolling Elements | Needle rollers (radial row) and cylindrical rollers (two axial rows) |
| Max Temp | 120 °C |
| Bearing Type | Needle Roller / Axial Cylindrical Roller Bearing, Combined, Double Direction |
| Item Weight | 6.09 lbs (2.761 kg) |
| Cage Material | Polyamide PA66 |
| Limiting Speed | 3,700 rpm oil / 1,200 rpm grease |
| Number Of Rows | 3 (one radial needle row, two axial cylindrical roller rows) |
| Bore Type | Straight cylindrical |
| Harmonization Code | 8482.40.00 |
| Preload | 29,834 N axial at 120 Nm locknut tightening torque |
| Bearing Material | Through-hardened chrome bearing steel rings and rollers, PA66 polyamide cage |
| Part Number | ZARF40115LTVA |
| Running Accuracy Radial And Axial Runout | Axial runout 1 µm |
| Cross Reference 1 | INA ZARF40115-L-TV (current catalogue designation) |
|---|---|
| Cross Reference 2 | INA ZARF40115-TV (related size, short locating washer, 75 mm height) |
INA ZARF40115LTVA needle roller / axial cylindrical roller bearing. ZARF series, double direction, for screw mounting, with a long shaft locating washer. 40 mm bore x 115 mm outside diameter x 93 mm height. This is a combined bearing: a radial needle roller row and two axial cylindrical roller rows in one unit, designed as the fixed-end support for a ball screw or lead screw. Carton designations: ZARF40115LTVA, ZARF-40115-L-TV-A, ZARF 40115 L TV A, ZARF40115-L-TV.
Series: ZARF, INA’s axial and radial roller bearing range for screw drives. Cage: TV, plastic cage in PA66 polyamide. Locating feature L: stepped shaft locating washer, extended on one side, which is what makes the overall height 93 mm rather than the 75 mm of the plain ZARF40115-TV. Mounting: screw mounting through the outer ring, 12 holes at 30° spacing on a 94 mm pitch circle for M8 screws.
The combined design carries the screw thrust and the radial reaction in a single short unit, so one bearing position does the work of a thrust bearing plus a radial bearing. Basic dynamic load rating, axial: 117,000 N. Basic static load rating, axial: 315,000 N. Basic dynamic load rating, radial: 38,000 N. Basic static load rating, radial: 74,000 N. Fatigue load limit, axial: 27,000 N. Fatigue load limit, radial: 10,400 N. Axial rigidity: 3,800 N/µm. Tilting stiffness: 1,800 Nm/mrad. Axial runout: 1 µm. Bearing friction torque: 2.5 Nm. Limiting speed with oil: 3,700 rpm. Limiting speed with grease: 1,200 rpm. Operating range: -30 °C to 120 °C. Weight: 2.761 kg (6.09 lb). Mass moment of inertia: 15.5 kg·cm².
One bearing unit, complete: outer ring, needle roller row, both axial cylindrical roller rows, the wave washer and the long shaft locating washer.
Screw-mounted to the housing face through 12 M8 holes on a 94 mm pitch circle at 30° spacing. Tightening torque for the axial locknut: 120 Nm, giving an axial preload force of 29,834 N. Maximum housing shoulder diameter: 79 mm. Minimum shaft shoulder diameter: 58 mm. Outer ring width: 22.5 mm. Height of outer ring over the wave washer: 65.5 mm. Shaft washer rib diameter: 78 mm. Wave washer width: 16 mm; long wave washer width: 34 mm; heel width 14 mm; heel diameter 60 mm; outside diameter 78 mm. Lubrication hole diameter: 6 mm, 12.5 mm from the face. Minimum chamfer dimensions: 0.3 mm and 0.6 mm. Housing bore position tolerance: 0.2 mm.
INA specifies an AM40 locknut for axial locking and a ZMA40/75 INA precision locknut for radial locking. The matching sealing ring size is 60 x 80 x 8 mm. Screw size: M8, twelve off.
ZARF40115-TV is a related size on the same 40 x 115 mm envelope: it uses the short locating washer and stands 75 mm high instead of 93 mm, so the two are not interchangeable in a given housing. The ZARF series is distinct from angular contact thrust types such as the 2344 or the BST family; its axial rows are cylindrical rollers, not balls, which is what gives the very high static axial capacity and the high tilting stiffness.
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