steve/pillow-block

Cast-iron pillow block unit UCP201 to UCP210, shafts 12 to 50 mm, as an envelope with its mounting slots.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset11 sizes

Unit number10 options

Detail

fullsimple

full: casting and bearing insert. simple: one solid casting with the bore, for big assemblies.

Defaults built

part.py 52 lines · Python · STEVE runtime · checked

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"""Cast-iron pillow block unit, NTN UCP2 series. Base on the XY plane, length along X; the shaft axis along Y at height H. Sourced and making the fit: bore d, shaft height H, length L, slots J and N x N1,

base width A and thickness H1, overall height H2, housing width L1, and the inner ring's width B. detail = "full" shows the unit: a casting that narrows from the feet to a round housing

of diameter 2 (H2 - H), and the bearing insert in it as its own solids, an outer ring and an inner ring standing out wider. The casting's taper and the rings' diameters are

proportions for looks, not for design. detail = "simple" is one solid casting with the bore. The set screws and the grease nipple are not modelled."""

from steve import Model

designation = "UCP204" # Unit number

detail = "full" # full: casting and bearing insert; simple: one solid

# number: (d, H, L, J, A, N, N1, H1, H2, L1, B, S). NTN Ball and Roller Bearings CAT. No. 2203-3/E (2024), Bearing Units, Cast iron pillow blocks UCP type,

# PDF pages 336 and 337, https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf

UNITS = {"UCP201": (12, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP202": (15, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP203": (17, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP204": (20, 33.3, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 65.0, 42.0, 31.0, 12.7), "UCP205": (25, 36.5, 140.0, 105.0, 38.0, 13.0, 16.0, 15.0, 71.0, 42.0, 34.1, 14.3), "UCP206": (30, 42.9, 165.0, 121.0, 48.0, 17.0, 20.0, 17.0, 83.0, 54.0, 38.1, 15.9), "UCP207": (35, 47.6, 167.0, 127.0, 48.0, 17.0, 20.0, 18.0, 93.0, 54.0, 42.9, 17.5), "UCP208": (40, 49.2, 184.0, 137.0, 54.0, 17.0, 20.0, 18.0, 98.0, 52.0, 49.2, 19.0), "UCP209": (45, 54.0, 190.0, 146.0, 54.0, 17.0, 20.0, 20.0, 106.0, 60.0, 49.2, 19.0), "UCP210": (50, 57.2, 206.0, 159.0, 60.0, 20.0, 23.0, 21.0, 114.0, 65.0, 51.6, 19.0)}

d, H, L, J, A, N, N1, H1, H2, L1, B, S = UNITS[designation]

R = H2 - H

slot = (N1 - N) / 2

seat = 0.74 * R if detail == "full" else d / 2 # the housing's bore: the insert's outer ring sits in it

foot = J / 2 - N1 / 2 - 0.15 * (J / 2)

foot = max(foot, 0.62 * R)

model = Model()

with model.sketch("casting_sketch", on="XZ", name="Casting") as sk:

sk.polyline("casting", [(-L / 2, 0), (L / 2, 0), (L / 2, H1), (foot, H1), (R, H), (R, H + 0.01), (-R, H + 0.01), (-R, H), (-foot, H1), (-L / 2, H1)], closed=True)

model.extrude("casting", "casting_sketch", distance=A, both=True, name="Casting")

with model.sketch("housing_sketch", on="XZ", name="Housing") as sk:

sk.circle("housing_od", (0, H), R)

model.extrude("housing", "housing_sketch", distance=L1, both=True, name="Housing")

with model.sketch("trim_sketch", on="XY", name="Below the base") as sk: # the housing circle can reach past the base's underside

sk.rect("trim", (-L, -L1), (L, L1))

model.extrude("trim", "trim_sketch", distance=-R, op="cut", name="Below the base")

with model.sketch("bore_sketch", on="XZ", name="Seat") as sk:

sk.circle("seat_d", (0, H), seat)

model.extrude("seat_cut", "bore_sketch", distance=max(L1, A) + 1, both=True, op="cut", name="Seat")

with model.sketch("slots_sketch", on="XY", name="Mounting slots") as sk:

sk.slot("slot_left", (-J / 2 - slot, 0), (-J / 2 + slot, 0), N / 2)

sk.slot("slot_right", (J / 2 - slot, 0), (J / 2 + slot, 0), N / 2)

model.extrude("slots", "slots_sketch", distance=H1, op="cut", name="Mounting slots")

if detail == "full":

gap = 0.03 * R

ring_in = (d / 2 + seat) / 2 + 0.03 * R

ring_width = 0.8 * L1

with model.sketch("outer_sketch", on="XZ", name="Insert outer ring") as sk:

sk.circle("outer_od", (0, H), seat)

sk.circle("outer_id", (0, H), ring_in + gap)

model.extrude("insert_outer", "outer_sketch", distance=ring_width, both=True, op="new", body="insert_outer_body", name="Insert outer ring")

with model.sketch("inner_sketch", on="XZ", name="Insert inner ring") as sk:

sk.circle("inner_od", (0, H), ring_in)

sk.circle("inner_id", (0, H), d / 2)

model.extrude("insert_inner", "inner_sketch", distance=B, both=True, op="new", body="insert_inner_body", name="Insert inner ring")

model.material("steel-generic", color="#6d7075")

result = model.result()

"""Cast-iron pillow block unit, NTN UCP2 series. Base on the XY plane, length along X; the shaft axis along Y at height H. Sourced and making the fit: bore d, shaft height H, length L, slots J and N x N1,
base width A and thickness H1, overall height H2, housing width L1, and the inner ring's width B. detail = "full" shows the unit: a casting that narrows from the feet to a round housing
of diameter 2 (H2 - H), and the bearing insert in it as its own solids, an outer ring and an inner ring standing out wider. The casting's taper and the rings' diameters are
proportions for looks, not for design. detail = "simple" is one solid casting with the bore. The set screws and the grease nipple are not modelled."""
from steve import Model

designation = "UCP204"  # Unit number
detail = "full"  # full: casting and bearing insert; simple: one solid

# number: (d, H, L, J, A, N, N1, H1, H2, L1, B, S). NTN Ball and Roller Bearings CAT. No. 2203-3/E (2024), Bearing Units, Cast iron pillow blocks UCP type,
# PDF pages 336 and 337, https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf
UNITS = {"UCP201": (12, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP202": (15, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP203": (17, 30.2, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 62.0, 42.0, 31.0, 12.7), "UCP204": (20, 33.3, 127.0, 95.0, 38.0, 13.0, 16.0, 14.0, 65.0, 42.0, 31.0, 12.7), "UCP205": (25, 36.5, 140.0, 105.0, 38.0, 13.0, 16.0, 15.0, 71.0, 42.0, 34.1, 14.3), "UCP206": (30, 42.9, 165.0, 121.0, 48.0, 17.0, 20.0, 17.0, 83.0, 54.0, 38.1, 15.9), "UCP207": (35, 47.6, 167.0, 127.0, 48.0, 17.0, 20.0, 18.0, 93.0, 54.0, 42.9, 17.5), "UCP208": (40, 49.2, 184.0, 137.0, 54.0, 17.0, 20.0, 18.0, 98.0, 52.0, 49.2, 19.0), "UCP209": (45, 54.0, 190.0, 146.0, 54.0, 17.0, 20.0, 20.0, 106.0, 60.0, 49.2, 19.0), "UCP210": (50, 57.2, 206.0, 159.0, 60.0, 20.0, 23.0, 21.0, 114.0, 65.0, 51.6, 19.0)}

d, H, L, J, A, N, N1, H1, H2, L1, B, S = UNITS[designation]
R = H2 - H
slot = (N1 - N) / 2
seat = 0.74 * R if detail == "full" else d / 2   # the housing's bore: the insert's outer ring sits in it
foot = J / 2 - N1 / 2 - 0.15 * (J / 2)
foot = max(foot, 0.62 * R)

model = Model()
with model.sketch("casting_sketch", on="XZ", name="Casting") as sk:
    sk.polyline("casting", [(-L / 2, 0), (L / 2, 0), (L / 2, H1), (foot, H1), (R, H), (R, H + 0.01), (-R, H + 0.01), (-R, H), (-foot, H1), (-L / 2, H1)], closed=True)
model.extrude("casting", "casting_sketch", distance=A, both=True, name="Casting")
with model.sketch("housing_sketch", on="XZ", name="Housing") as sk:
    sk.circle("housing_od", (0, H), R)
model.extrude("housing", "housing_sketch", distance=L1, both=True, name="Housing")
with model.sketch("trim_sketch", on="XY", name="Below the base") as sk:   # the housing circle can reach past the base's underside
    sk.rect("trim", (-L, -L1), (L, L1))
model.extrude("trim", "trim_sketch", distance=-R, op="cut", name="Below the base")
with model.sketch("bore_sketch", on="XZ", name="Seat") as sk:
    sk.circle("seat_d", (0, H), seat)
model.extrude("seat_cut", "bore_sketch", distance=max(L1, A) + 1, both=True, op="cut", name="Seat")
with model.sketch("slots_sketch", on="XY", name="Mounting slots") as sk:
    sk.slot("slot_left", (-J / 2 - slot, 0), (-J / 2 + slot, 0), N / 2)
    sk.slot("slot_right", (J / 2 - slot, 0), (J / 2 + slot, 0), N / 2)
model.extrude("slots", "slots_sketch", distance=H1, op="cut", name="Mounting slots")
if detail == "full":
    gap = 0.03 * R
    ring_in = (d / 2 + seat) / 2 + 0.03 * R
    ring_width = 0.8 * L1
    with model.sketch("outer_sketch", on="XZ", name="Insert outer ring") as sk:
        sk.circle("outer_od", (0, H), seat)
        sk.circle("outer_id", (0, H), ring_in + gap)
    model.extrude("insert_outer", "outer_sketch", distance=ring_width, both=True, op="new", body="insert_outer_body", name="Insert outer ring")
    with model.sketch("inner_sketch", on="XZ", name="Insert inner ring") as sk:
        sk.circle("inner_od", (0, H), ring_in)
        sk.circle("inner_id", (0, H), d / 2)
    model.extrude("insert_inner", "inner_sketch", distance=B, both=True, op="new", body="insert_inner_body", name="Insert inner ring")
model.material("steel-generic", color="#6d7075")
result = model.result()

pypart.toml 98 lines · TOML

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name = "steve/pillow-block"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Cast-iron pillow block unit UCP201 to UCP210, shafts 12 to 50 mm, as an envelope with its mounting slots."

description = """Pillow block unit (UCP2 series): a casting that narrows from its feet to a round housing, its two mounting slots, and the bearing insert showing in the housing. Base on the XY plane, shaft axis along Y. The fit dimensions are from a maker's public catalogue; the casting's taper and the rings' diameters are proportions for looks, not for design. detail = simple is one solid casting with the bore. See the README; not affiliated with any maker."""

tags = ["bearing", "pillow-block", "ucp", "bearing-unit", "metric", "motion"]

[parameters.designation]

type = "choice"

default = "UCP204"

choices = ["UCP201", "UCP202", "UCP203", "UCP204", "UCP205", "UCP206", "UCP207", "UCP208", "UCP209", "UCP210"]

label = "Unit number"

[parameters.detail]

type = "choice"

default = "full"

choices = ["full", "simple"]

label = "Detail"

description = "full: casting and bearing insert. simple: one solid casting with the bore, for big assemblies."

[[presets]]

id = "UCP201"

title = "UCP201 (12 mm shaft)"

params = { designation = "UCP201" }

aliases = ["UCP201 pillow block", "12mm pillow block", "UC201 unit", "P201"]

standard = "NTN UCP"

[[presets]]

id = "UCP202"

title = "UCP202 (15 mm shaft)"

params = { designation = "UCP202" }

aliases = ["UCP202 pillow block", "15mm pillow block", "UC202 unit", "P202"]

standard = "NTN UCP"

[[presets]]

id = "UCP203"

title = "UCP203 (17 mm shaft)"

params = { designation = "UCP203" }

aliases = ["UCP203 pillow block", "17mm pillow block", "UC203 unit", "P203"]

standard = "NTN UCP"

[[presets]]

id = "UCP204"

title = "UCP204 (20 mm shaft)"

params = { designation = "UCP204" }

aliases = ["UCP204 pillow block", "20mm pillow block", "UC204 unit", "P204"]

standard = "NTN UCP"

[[presets]]

id = "UCP205"

title = "UCP205 (25 mm shaft)"

params = { designation = "UCP205" }

aliases = ["UCP205 pillow block", "25mm pillow block", "UC205 unit", "P205"]

standard = "NTN UCP"

[[presets]]

id = "UCP206"

title = "UCP206 (30 mm shaft)"

params = { designation = "UCP206" }

aliases = ["UCP206 pillow block", "30mm pillow block", "UC206 unit", "P206"]

standard = "NTN UCP"

[[presets]]

id = "UCP207"

title = "UCP207 (35 mm shaft)"

params = { designation = "UCP207" }

aliases = ["UCP207 pillow block", "35mm pillow block", "UC207 unit", "P207"]

standard = "NTN UCP"

[[presets]]

id = "UCP208"

title = "UCP208 (40 mm shaft)"

params = { designation = "UCP208" }

aliases = ["UCP208 pillow block", "40mm pillow block", "UC208 unit", "P208"]

standard = "NTN UCP"

[[presets]]

id = "UCP209"

title = "UCP209 (45 mm shaft)"

params = { designation = "UCP209" }

aliases = ["UCP209 pillow block", "45mm pillow block", "UC209 unit", "P209"]

standard = "NTN UCP"

[[presets]]

id = "UCP210"

title = "UCP210 (50 mm shaft)"

params = { designation = "UCP210" }

aliases = ["UCP210 pillow block", "50mm pillow block", "UC210 unit", "P210"]

standard = "NTN UCP"

[[presets]]

id = "UCP204-simple"

title = "UCP204, simple (one solid)"

params = { designation = "UCP204", detail = "simple" }

aliases = ["UCP204 simple"]

standard = "NTN UCP"

name = "steve/pillow-block"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Cast-iron pillow block unit UCP201 to UCP210, shafts 12 to 50 mm, as an envelope with its mounting slots."
description = """Pillow block unit (UCP2 series): a casting that narrows from its feet to a round housing, its two mounting slots, and the bearing insert showing in the housing. Base on the XY plane, shaft axis along Y. The fit dimensions are from a maker's public catalogue; the casting's taper and the rings' diameters are proportions for looks, not for design. detail = simple is one solid casting with the bore. See the README; not affiliated with any maker."""
tags = ["bearing", "pillow-block", "ucp", "bearing-unit", "metric", "motion"]

[parameters.designation]
type = "choice"
default = "UCP204"
choices = ["UCP201", "UCP202", "UCP203", "UCP204", "UCP205", "UCP206", "UCP207", "UCP208", "UCP209", "UCP210"]
label = "Unit number"

[parameters.detail]
type = "choice"
default = "full"
choices = ["full", "simple"]
label = "Detail"
description = "full: casting and bearing insert. simple: one solid casting with the bore, for big assemblies."

[[presets]]
id = "UCP201"
title = "UCP201 (12 mm shaft)"
params = { designation = "UCP201" }
aliases = ["UCP201 pillow block", "12mm pillow block", "UC201 unit", "P201"]
standard = "NTN UCP"

[[presets]]
id = "UCP202"
title = "UCP202 (15 mm shaft)"
params = { designation = "UCP202" }
aliases = ["UCP202 pillow block", "15mm pillow block", "UC202 unit", "P202"]
standard = "NTN UCP"

[[presets]]
id = "UCP203"
title = "UCP203 (17 mm shaft)"
params = { designation = "UCP203" }
aliases = ["UCP203 pillow block", "17mm pillow block", "UC203 unit", "P203"]
standard = "NTN UCP"

[[presets]]
id = "UCP204"
title = "UCP204 (20 mm shaft)"
params = { designation = "UCP204" }
aliases = ["UCP204 pillow block", "20mm pillow block", "UC204 unit", "P204"]
standard = "NTN UCP"

[[presets]]
id = "UCP205"
title = "UCP205 (25 mm shaft)"
params = { designation = "UCP205" }
aliases = ["UCP205 pillow block", "25mm pillow block", "UC205 unit", "P205"]
standard = "NTN UCP"

[[presets]]
id = "UCP206"
title = "UCP206 (30 mm shaft)"
params = { designation = "UCP206" }
aliases = ["UCP206 pillow block", "30mm pillow block", "UC206 unit", "P206"]
standard = "NTN UCP"

[[presets]]
id = "UCP207"
title = "UCP207 (35 mm shaft)"
params = { designation = "UCP207" }
aliases = ["UCP207 pillow block", "35mm pillow block", "UC207 unit", "P207"]
standard = "NTN UCP"

[[presets]]
id = "UCP208"
title = "UCP208 (40 mm shaft)"
params = { designation = "UCP208" }
aliases = ["UCP208 pillow block", "40mm pillow block", "UC208 unit", "P208"]
standard = "NTN UCP"

[[presets]]
id = "UCP209"
title = "UCP209 (45 mm shaft)"
params = { designation = "UCP209" }
aliases = ["UCP209 pillow block", "45mm pillow block", "UC209 unit", "P209"]
standard = "NTN UCP"

[[presets]]
id = "UCP210"
title = "UCP210 (50 mm shaft)"
params = { designation = "UCP210" }
aliases = ["UCP210 pillow block", "50mm pillow block", "UC210 unit", "P210"]
standard = "NTN UCP"

[[presets]]
id = "UCP204-simple"
title = "UCP204, simple (one solid)"
params = { designation = "UCP204", detail = "simple" }
aliases = ["UCP204 simple"]
standard = "NTN UCP"

README.md 30 lines · Markdown

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Pillow block (UCP)

Cast-iron pillow block unit, UCP2 series, as an envelope for assemblies. Base on the XY plane, length along X, shaft axis along Y at height H.

Geometry

A casting that narrows from its feet to a round housing of diameter 2 (H2 − H) and width L1, two mounting slots N × N1 at ±J/2, and the bearing insert in the housing: an outer ring, and an inner ring of the published width B that stands out wider.

For the fit (sourced, below): d, H, L, J, A, N, N1, H1, H2, L1, and B in part.py. For looks only, not for design: the casting's taper and the rings' diameters; the catalogue doesn't draw the outline. Set screws and the grease nipple aren't modelled. detail = "simple" is one solid casting with the bore.

Source

NTN, Ball and Roller Bearings, CAT. No. 2203-3/E (2024), Bearing Units, Cast iron pillow blocks UCP type, PDF pages 336 and 337, https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf.

Number	d	H	L	J	A	N × N1	H1	H2	L1
UCP201	12	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP202	15	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP203	17	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP204	20	33.3	127.0	95.0	38.0	13.0 × 16.0	14.0	65.0	42.0
UCP205	25	36.5	140.0	105.0	38.0	13.0 × 16.0	15.0	71.0	42.0
UCP206	30	42.9	165.0	121.0	48.0	17.0 × 20.0	17.0	83.0	54.0
UCP207	35	47.6	167.0	127.0	48.0	17.0 × 20.0	18.0	93.0	54.0
UCP208	40	49.2	184.0	137.0	54.0	17.0 × 20.0	18.0	98.0	52.0
UCP209	45	54.0	190.0	146.0	54.0	17.0 × 20.0	20.0	106.0	60.0
UCP210	50	57.2	206.0	159.0	60.0	20.0 × 23.0	21.0	114.0	65.0

Maker names identify the source; this part isn't made by or affiliated with any maker.

# Pillow block (UCP)

Cast-iron pillow block unit, UCP2 series, as an envelope for assemblies. Base on the XY plane, length along X, shaft axis along Y at height H.

## Geometry

A casting that narrows from its feet to a round housing of diameter 2 (H2 − H) and width L1, two mounting slots N × N1 at ±J/2, and the bearing insert in the housing: an outer ring, and an inner ring of the published width B that stands out wider.

**For the fit (sourced, below):** d, H, L, J, A, N, N1, H1, H2, L1, and B in `part.py`. **For looks only, not for design:** the casting's taper and the rings' diameters; the catalogue doesn't draw the outline. Set screws and the grease nipple aren't modelled. `detail = "simple"` is one solid casting with the bore.

## Source

NTN, *Ball and Roller Bearings*, CAT. No. 2203-3/E (2024), Bearing Units, Cast iron pillow blocks UCP type, PDF pages 336 and 337,
<https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf>.

| Number | d | H | L | J | A | N × N1 | H1 | H2 | L1 |
|---|---|---|---|---|---|---|---|---|---|
| UCP201 | 12 | 30.2 | 127.0 | 95.0 | 38.0 | 13.0 × 16.0 | 14.0 | 62.0 | 42.0 |
| UCP202 | 15 | 30.2 | 127.0 | 95.0 | 38.0 | 13.0 × 16.0 | 14.0 | 62.0 | 42.0 |
| UCP203 | 17 | 30.2 | 127.0 | 95.0 | 38.0 | 13.0 × 16.0 | 14.0 | 62.0 | 42.0 |
| UCP204 | 20 | 33.3 | 127.0 | 95.0 | 38.0 | 13.0 × 16.0 | 14.0 | 65.0 | 42.0 |
| UCP205 | 25 | 36.5 | 140.0 | 105.0 | 38.0 | 13.0 × 16.0 | 15.0 | 71.0 | 42.0 |
| UCP206 | 30 | 42.9 | 165.0 | 121.0 | 48.0 | 17.0 × 20.0 | 17.0 | 83.0 | 54.0 |
| UCP207 | 35 | 47.6 | 167.0 | 127.0 | 48.0 | 17.0 × 20.0 | 18.0 | 93.0 | 54.0 |
| UCP208 | 40 | 49.2 | 184.0 | 137.0 | 54.0 | 17.0 × 20.0 | 18.0 | 98.0 | 52.0 |
| UCP209 | 45 | 54.0 | 190.0 | 146.0 | 54.0 | 17.0 × 20.0 | 20.0 | 106.0 | 60.0 |
| UCP210 | 50 | 57.2 | 206.0 | 159.0 | 60.0 | 20.0 × 23.0 | 21.0 | 114.0 | 65.0 |

Maker names identify the source; this part isn't made by or affiliated with any maker.

Use this part

STEVE

Open in STEVE

Open it in STEVE The STEVE runtime runs in STEVE: open the part there, or download the code and bundle.

Get the code

curl -o part.py "https://pythonparts.org/p/steve/pillow-block/v/1.0.0/raw/part.py"

Raw files, bundle and API

part.py
pypart.toml
README.md
bundle.tar.gzthe package, as published

curl "https://pythonparts.org/api/v1/parts/steve/pillow-block/1.0.0"

The version's JSON (parameters, presets, files); add /build?name=value for a build at other values.

About this part

steve124 parts

Profile

Steel (generic)Carbon & alloy steels · Custom finish · 7.9 g/cm³

Mass: 1.2 kg

At the parameters shown in the viewer, 3 bodies.

License: MIT

Permissive: use, change and sell it; keep the copyright notice.

Runtime: STEVE
Requirements: None stated in the code
Built with: CadQuery 2.9.0.dev0
Published: Nov 5, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: b615e677be9f…

#bearing #pillow-block #ucp #bearing-unit #metric #motion

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Pillow block unit (UCP2 series): a casting that narrows from its feet to a round housing, its two mounting slots, and the bearing insert showing in the housing. Base on the XY plane, shaft axis along Y. The fit dimensions are from a maker's public catalogue; the casting's taper and the rings' diameters are proportions for looks, not for design. detail = simple is one solid casting with the bore. See the README; not affiliated with any maker.

Pillow block (UCP)

Cast-iron pillow block unit, UCP2 series, as an envelope for assemblies. Base on the XY plane, length along X, shaft axis along Y at height H.

Geometry

Source

NTN, Ball and Roller Bearings, CAT. No. 2203-3/E (2024), Bearing Units, Cast iron pillow blocks UCP type, PDF pages 336 and 337, https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf.

Number	d	H	L	J	A	N × N1	H1	H2	L1
UCP201	12	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP202	15	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP203	17	30.2	127.0	95.0	38.0	13.0 × 16.0	14.0	62.0	42.0
UCP204	20	33.3	127.0	95.0	38.0	13.0 × 16.0	14.0	65.0	42.0
UCP205	25	36.5	140.0	105.0	38.0	13.0 × 16.0	15.0	71.0	42.0
UCP206	30	42.9	165.0	121.0	48.0	17.0 × 20.0	17.0	83.0	54.0
UCP207	35	47.6	167.0	127.0	48.0	17.0 × 20.0	18.0	93.0	54.0
UCP208	40	49.2	184.0	137.0	54.0	17.0 × 20.0	18.0	98.0	52.0
UCP209	45	54.0	190.0	146.0	54.0	17.0 × 20.0	20.0	106.0	60.0
UCP210	50	57.2	206.0	159.0	60.0	20.0 × 23.0	21.0	114.0	65.0

Maker names identify the source; this part isn't made by or affiliated with any maker.

1.0.0 Latest Nov 5, 2026 · 1 day ago

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Pillow block (UCP)

Geometry

Source

Pillow block (UCP)

Geometry

Source

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